Vacuum adsorption unit and vacuum adsorption carrier

Patent metadata

Field	Value
Publication number	US-10861728-B2
Application number	US-201715730756-A
Country	US
Kind code	B2
Filing date	Oct 12, 2017
Priority date	Feb 28, 2017
Publication date	Dec 8, 2020
Grant date	Dec 8, 2020

Abstract

The present disclosure discloses a vacuum adsorption unit and a vacuum adsorption carrier, wherein the vacuum adsorption unit comprises: a housing defining an air path through-hole therein, the air path through-hole provided with an upper abutting surface and a lower abutting surface; a piston movable provided in the air path through-hole and is located between the upper abutting surface and the lower abutting surface; an outer peripheral wall of the piston is slidably matched with an inner peripheral wall of the air path through-hole; an elastic member having both ends that respectively abut against the housing and the piston, to constantly drive the piston to abut on the upper abutting surface; and a pressure relief passage communicated with the air path through-hole, and is configured to be closed only when the piston moves to abut against the lower abutting surface.

First claim

What is claimed is:

1. A vacuum adsorption unit comprising:
a housing defining an air path through-hole therein, the air path through-hole is provided with an upper abutting surface and a lower abutting surface;
a piston movably provided in the air path through-hole and located between the upper abutting surface and the lower abutting surface, an outer peripheral wall of the piston is slidably matched with an inner peripheral wall of the air path through-hole;
an elastic member having an upper end and a lower end that respectively abut against an abutment piece of the housing and the piston, to constantly drive the piston to abut against the upper abutting surface; and
a pressure relief passage communicated with the air path through-hole, and configured to be closed only when the piston moves to abut against the lower abutting surface;
wherein, the pressure relief passage is provided in the housing, an upper end of the pressure relief passage is located above the upper abutting surface, a lower end of the pressure relief passage is located above the lower abutting surface, a side wall of the piston plugs the lower end of the pressure relief passage to close the pressure relief passage when the piston moves to abut against the lower abutting surface.

2. The vacuum adsorption unit according to claim 1 , wherein, the housing comprises:
a cylinder defining the air path through-hole therein;
a stopper provided on an inner wall of the air path through-hole, the stopper is provided with a through hole in communication with the air path through-hole, an upper surface of the stopper defines the lower abutting surface; and
the abutment piece provided on a lower surface of the stopper, the elastic member is provided under the piston, and the lower end of the elastic member passes through the through hole to abut against the abutment piece;
wherein the abutment piece is a gasket.

3. The vacuum adsorption unit according to claim 2 , wherein, the cylinder comprises:
a hollow outer sleeve;
a hollow inner sleeve provided in the outer sleeve and located above the stopper, the pressure relief passage is defined between an outer peripheral wall of the inner sleeve and the inner peripheral wall of the outer sleeve, the piston is movably provided in the inner sleeve.

4. The vacuum adsorption unit according to claim 3 , wherein, an inner top wall of the inner sleeve defines the upper abutting surface.

5. The vacuum adsorption unit according to claim 1 , wherein, the housing comprises:
a cylinder defining the air path through-hole therein;
a stopper provided on an inner wall of the air path through-hole, the stopper is provided with a through hole in communication with the air path through-hole, an upper surface of the stopper defines the lower abutting surf ace; and
the abutment piece provided on an inner wall of the cylinder and located above the stopper, the elastic member is located above the piston, the upper and lower ends of the elastic member are connected to the abutment piece and the piston, respectively
wherein the abutment piece is a gasket.

6. The vacuum adsorption unit according to claim 5 , wherein, the cylinder comprises:
a hollow outer sleeve; and
a hollow inner sleeve provided in the outer sleeve and located above the stopper, the pressure relief passage is defined between the outer peripheral wall of the inner sleeve and the inner peripheral wall of the outer sleeve, the piston is movably provided in the inner sleeve.

7. The vacuum adsorption unit according to claim 6 , wherein, an inner top wall of the inner sleeve defines the upper abutting surface.

8. The vacuum adsorption unit according to claim 1 , wherein, an upper end of the housing is provided with external threads.

9. The vacuum adsorption unit according to claim 1 , wherein, the inner peripheral wall of the lower end of the air path through-hole is provided with internal threads.

10. The vacuum adsorption unit according to claim 1 , wherein, the elastic member is a spring.

11. The vacuum adsorption unit according to claim 1 , wherein, a cross-sectional area of the pressure relief passage remains constant.

12. A vacuum adsorption carrier comprising:
a substrate carrier provided with a vacuum suction tank;
a vacuum adsorption unit connected with the vacuum suction tank in fit manner; wherein, the vacuum adsorption unit comprises:
a housing defining an air path through-hole therein, the air path through-hole is provided with an upper abutting surface and a lower abutting surface;
a piston movably provided in the air path through-hole and located between the upper abutting surface and the lower abutting surface, an outer peripheral wall of the piston slidably matches with an inner peripheral wall of the air path through-hole;
an elastic member having an upper end and a lower end that respectively abut against an abutment piece of the housing and the piston, to constantly drive the piston to abut against the upper abutting surface; and
a pressure relief passage communicated with the air path through-hole, and is configured to be closed only when the piston moves to abut against the lower abutting surface;
wherein, the pressure relief passage is provided in the housing, an upper end of the pressure relief passage is located above the upper abutting surface, and a lower end of the pressure relief passage is located above the lower abutting surface, a side wall of the piston plugs the lower end of the pressure relief passage to close the pressure relief passage when the piston moves to abut against the lower abutting surface.

13. The vacuum adsorption carrier according to claim 12 , wherein, the vacuum suction tank is in plural, the vacuum adsorption unit is in plural and is connected with a plurality of vacuum suction tank in a corresponding and fit manner.

14. The vacuum adsorption carrier according to claim 12 , wherein, the housing comprises:
a cylinder defining the air path through-hole therein;
a stopper, which is provided on an inner wall of the air path through-hole, the stopper is provided with a through hole in communication with the air path through-hole, an upper surface of the stopper defines the lower abutting surface; and
the abutment piece provided on a lower surface of the stopper, the elastic member is provided under the piston, and the lower end of the elastic member passes through the through hole to abut on the abutment piece; wherein the abutment piece is a gasket.

15. The vacuum adsorption carrier according to claim 12 , wherein, the housing comprises:
a cylinder defining the air path through-hole therein;
a stopper provided on an inner wall of the air path through-hole, the stopper is provided with a through hole in communication with the air path through-hole, an upper surface of the stopper defines the lower abutting surf ace; and
the abutment piece provided on an inner wall of the cylinder and located above the stopper, the elastic member is located above the piston, the upper and lower ends of the elastic member are connected to the abutment piece and the piston, respectively;
wherein the abutment piece is a gasket.

16. The vacuum adsorption carrier according to claim 15 , wherein, the cylinder comprises:
a hollow outer sleeve;
a hollow inner sleeve provided in the outer sleeve and located above the stopper, the pressure relief passage is defined between an outer peripheral wall of the inner sleeve and the inner peripheral wall of the outer sleeve, the piston is movably provided in the inner sleeve.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Zheng Hanbo
• Li Li
• Yan Junwei
• Feng Changhai

Classifications

• H10P72/1921

  characterised by substrate supports · CPC title

• H10P72/1926 Primary

  characterised by the presence of atmosphere modifying elements inside or attached to the closed carrier · CPC title

• B25B11/005 Primary

  Vacuum work holders · CPC title

• H05K2203/0195

  Tool for a process not provided for in H05K3/00, e.g. tool for handling objects using suction, for deforming objects, for applying local pressure · CPC title

• H05K3/00

  Apparatus or processes for manufacturing printed circuits · CPC title