Printing device provided with walls for preventing leakage of electrolysis liquid to outside of walls

Patent metadata

Field	Value
Publication number	US-10081208-B2
Application number	US-201715466205-A
Country	US
Kind code	B2
Filing date	Mar 22, 2017
Priority date	Mar 25, 2016
Publication date	Sep 25, 2018
Grant date	Sep 25, 2018

Abstract

A printing device includes: a casing, a circuit board, an electrolytic capacitor, an explosion-proof valve, a first wall, a second wall, and a specific region. The electrolytic capacitor is connected to the circuit board. The electrolytic capacitor includes a sleeve portion containing electrolysis liquid therein and has an axis defining an axial direction. The sleeve portion has one end portion, another end portion, and a peripheral surface extending therebetween. The explosion-proof valve is provided at the one end portion. The first wall is disposed in the casing and faces the explosion-proof valve. The second wall extends from the first wall and faces at least a portion of the peripheral surface. The specific region is provided in the second wall and has one of a recessed portion and a protruding portion. The recessed portion is recessed away from the peripheral surface. The protruding portion protrudes toward the peripheral surface.

First claim

What is claimed is:

1. A printing device comprising:
a casing;
a circuit board provided in the casing;
an electrolytic capacitor disposed in the casing and connected to the circuit board, the electrolytic capacitor including a sleeve portion containing electrolysis liquid therein, the sleeve portion having an axis defining an axial direction, the sleeve portion including one end portion, another end portion away from the one end portion in the axial direction, and a peripheral surface extending between the one end portion and the other end portion;
an explosion-proof valve provided at the one end portion of the sleeve portion in the axial direction;
a first wall disposed in the casing and facing the explosion-proof valve in the axial direction with a space therebetween;
a second wall extending from the first wall in the axial direction, the second wall facing at least a portion of the peripheral surface of the sleeve portion with a space therebetween; and
a specific region provided in the second wall and having one of a recessed portion and a protruding portion, the recessed portion being recessed away from the peripheral surface, the protruding portion protruding toward the peripheral surface.

2. The printing device according to claim 1 , wherein the first wall has a peripheral end portion defining a profile of the first wall,
wherein at least a portion of the peripheral end portion and the axis defines a first distance therebetween in a radial direction of the sleeve portion, and
wherein the peripheral surface of the sleeve portion and the axis defines a second distance therebetween in the radial direction, the first distance being greater than the second distance.

3. The printing device according to claim 1 , wherein the sleeve portion has an outer diameter, and
wherein the first wall and the explosion-proof valve defines a minimum distance in the axial direction, the minimum distance being greater than zero and not more than half the outer diameter.

4. The printing device according to claim 1 , wherein the first wall has a sloped portion at a side facing the explosion-proof valve, the sloped portion being inclined so as to become closer to the explosion-proof valve with increasing a distance from the axis in a radial direction, and
wherein the second wall extends from a profile end of the sloped portion in a direction from the one end portion to the other end portion.

5. The printing device according to claim 1 , wherein the protruding portion of the specific region has two surfaces intersecting with each other to define a corner portion.

6. The printing device according to claim 5 , wherein the specific region comprises a plurality of protruding portions extending linearly in a direction crossing the axial direction, the plurality of the protruding portions being arrayed in the axial direction with a space between neighboring protruding portions.

7. The printing device according to claim 1 , wherein the circuit board extends in the axial direction and is spaced away from the sleeve portion and the first wall in a radial direction of the sleeve portion, and
wherein the second wall includes a first specific wall positioned opposite to the circuit board with respect to the sleeve portion.

8. The printing device according to claim 7 , wherein the specific region is provided in the first specific wall.

9. The printing device according to claim 7 , wherein the second wall further comprises a second specific wall disposed so as to extend perpendicularly relative to the first specific wall.

10. The printing device according to claim 9 , wherein the specific region is provided in the first specific wall and the second specific wall.

11. The printing device according to claim 7 , further comprising a third wall facing the other end portion of the sleeve portion with a space therebetween in the axial direction.

12. The printing device according to claim 1 , wherein the casing comprises:
a first casing having an open end opening in a direction crossing the axial direction; and
a second casing connected to the first casing to close the open end,
wherein the first casing has a particular region adjacent to the open end, the particular region being aligned with the sleeve portion in the axial direction.

13. The printing device according to claim 1 , wherein the circuit board is positioned opposite to the first wall with respect to the sleeve portion in the axial direction, and
wherein the specific region comprises a plurality of the protruding portions extending linearly in the axial direction and arrayed in a direction crossing the axial direction with a space between neighboring protruding portions.

14. The printing device according to claim 13 , wherein the first wall comprises a rib protruding toward the one end portion of the sleeve portion.

15. A printing device comprising:
a casing;
a circuit board provided in the casing;
an electrolytic capacitor disposed in the casing and connected to the circuit board, the electrolytic capacitor including a sleeve portion containing electrolysis liquid therein, the sleeve portion having an axis defining an axial direction, the sleeve portion including one end portion, another end portion away from the one end portion in the axial direction, and a peripheral surface extending between the one end portion and the other end portion;
an explosion-proof valve provided at the one end portion of the sleeve portion in the axial direction;
a first wall disposed in the casing and facing the explosion-proof valve in the axial direction with a space therebetween;
a second wall extending from the first wall in the axial direction, the second wall facing at least a portion of the peripheral surface of the sleeve portion with a space therebetween; and
a specific region provided in the first wall and having one of a recessed portion and a protruding portion, the recessed portion being recessed away from the one end portion of the sleeve portion, the protruding portion protruding toward the one end portion of the sleeve portion.

16. The printing device according to claim 15 , wherein the second wall comprises a pair of walls facing in a first direction perpendicular to the axial direction,
wherein the first wall is formed in a plane shape perpendicular to the axial direction, the first wall extending in the first direction and a second direction perpendicular to the first direction and the axial direction, and
wherein the protruding portion comprises a plurality of protruding portions extending linearly in the second direction, the plurality of protruding portions being arrayed in the first direction with a space between neighboring protruding portions.

17. The printing device according to claim 15 , wherein the first wall has a peripheral end portion defining a profile of the first wall,
wherein at least a portion of the peripheral end portion and the axis defines a first distance therebetween in a radial direction of the sleeve portion, and
wherein the peripheral surface of the sleeve portion and the axis defines a second distance therebetween in the radial direction, the first distance being greater than the second distance.

18. The printing device according to claim 15 , wherein the sleeve portion has an outer diameter, and
wherein the first wall and the explosion-proof valve defines a minimum distance in the axial direction, the minimum distance being greater than zero and not more than half the outer diameter.

19. The printing device according to claim 15 , wherein the first wa

Assignees

• Brother Ind Ltd

Inventors

• Takahashi Ryoya

Classifications

• B41J3/4075

  Tape printers; Label printers · CPC title

• B41J2/355

  Control circuits for heating-element selection · CPC title

• B41J29/13 Primary

  Cases or covers · CPC title

• H01G9/12

  Vents or other means allowing expansion · CPC title

• B41J2/32

  using thermal heads · CPC title