Screwless terminal block

Patent metadata

Field	Value
Publication number	US-9819121-B2
Application number	US-201615382842-A
Country	US
Kind code	B2
Filing date	Dec 19, 2016
Priority date	Mar 7, 2016
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

A screwless terminal block allows easy insertion and removal of a wire. A housing ( 2 ) includes a fixture insertion opening ( 23 ) through which a rod-like fixture ( 6 ) is inserted to come in contact with a contact pressure spring ( 4 ) and deform the spring ( 4 ) away from a wire ( 5 ). When the fixture ( 6 ) is inserted through the fixture insertion opening ( 23 ), an acute angle of 45° or less is formed by an axis of the fixture ( 6 ) and a straight line connecting a contact point A between the housing ( 2 ) and a part of the fixture ( 6 ) adjacent to the wire insertion opening ( 24 ) and a contact point B between the housing ( 2 ) and a part of the fixture ( 6 ) adjacent to the spring ( 4 ) at a cross-section taken along a plane including the axis of the fixture ( 6 ) and parallel to a pressing direction of the spring ( 4 ).

First claim

The invention claimed is:

1. A screwless terminal block, comprising:
a resin housing having a wire insertion opening through which a wire is to be inserted, and an internal wire accommodating space configured to accommodate the wire; and
an elastic member configured to come in contact with the wire inserted through the wire insertion opening and apply a force to the wire in a predetermined pressing direction to prevent the wire from coming off,
the housing having a fixture insertion opening through which a rod-like fixture is to be inserted to come in contact with the elastic member and deform the elastic member away from the wire accommodating space,
wherein when the fixture is inserted through the fixture insertion opening, an acute angle of 45° or less is formed by an axis of the fixture and a straight line connecting a point A and a point B at a cross-section taken along a plane that includes the axis of the fixture and is parallel to the predetermined pressing direction, where the point A is a point of contact between the housing and a part of the fixture adjacent to the wire insertion opening, and the point B is a point of contact between the housing and a part of the fixture adjacent to the elastic member.

2. The screwless terminal block according to claim 1 , wherein the elastic member is configured to apply a force of 30 N or less to the fixture inserted through the fixture insertion opening.

3. The screwless terminal block according to claim 2 , wherein the housing has a curved surface with a curvature of an outer periphery of the fixture, and the point B is included in the curved surface.

4. The screwless terminal block according to claim 2 , wherein
when the fixture is inserted through the fixture insertion opening, c/b≦7/3,
where b is a distance between the point B and a plane X that includes the point A and is perpendicular to the axis of the fixture, and c is a distance between the plane X and a point C that is a point of contact between the fixture and the elastic member.

5. The screwless terminal block according to claim 4 , wherein the housing has a curved surface with a curvature of an outer periphery of the fixture, and the point B is included in the curved surface.

6. A screwless terminal block, comprising:
a resin housing having a wire insertion opening through which a wire is to be inserted; and
an elastic member configured to come in contact with the wire inserted through the wire insertion opening and apply a force to the wire in a predetermined pressing direction to prevent the wire from coming off,
the housing having a fixture insertion opening through which a rod-like fixture is to be inserted to come in contact with the elastic member and deform the elastic member away from the wire,
wherein when the fixture is inserted through the fixture insertion opening, c/b≦70/Fc at a cross-section taken along a plane that includes an axis of the fixture and is parallel to the predetermined pressing direction, where b is a distance between a point B and a plane X that includes a point A and is perpendicular to the axis of the fixture, c is a distance between the plane X and a point C, and Fc (N) is a force applied from the elastic member and received by the fixture, and the point A is a point of contact between the housing and a part of the fixture adjacent to the wire insertion opening, the point B is a point of contact between the housing and a part of the fixture adjacent to the elastic member, and the point C is a point of contact between the fixture and the elastic member.

7. The screwless terminal block according to claim 1 , wherein the housing has a curved surface with a curvature of an outer periphery of the fixture, and the point B is included in the curved surface.

Assignees

• Omron Tateisi Electronics Co

Inventors

• Masaki Kenichiro
• Yano Keisuke
• Hashimoto Hiroshi
• Tajiri Yoshikazu
• Ikeda Tomokazu
• Tsuji Shinya
• Fujiwara Taijiro
• Ono Masahiro
• Nagase Masao
• KOMOGUCHI Yusuke

Classifications

• H01R9/24 Primary

  Terminal blocks · CPC title

• H01R4/48 Primary

  utilising a spring, clip, or other resilient member (H01R4/52 takes precedence) · CPC title

• H01R13/635

  by mechanical pressure, e.g. spring force · CPC title

• H01R9/2416

  Means for guiding or retaining wires or cables connected to terminal blocks · CPC title

• H01R13/62 Primary

  Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement · CPC title