CN219127326U

CN219127326U - Vibration capsule

Info

Publication number: CN219127326U
Application number: CN202222622421.0U
Authority: CN
Inventors: 王芳; 段晓东
Original assignee: Ankon Medical Technologies Shanghai Ltd
Current assignee: Ankon Medical Technologies Shanghai Ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-06-06
Anticipated expiration: 2032-09-30

Abstract

The utility model discloses a vibration capsule which comprises a shell, a vibration motor, a battery assembly and a control assembly, wherein the vibration motor, the battery assembly and the control assembly are all positioned in the shell, the vibration motor and the battery assembly are electrically connected with the control assembly, the vibration capsule further comprises a motor support used for fixing the vibration motor, and the motor support is provided with a first fixing part matched with the motor support and a second fixing part matched with the control assembly. The control component is matched with the motor bracket, and the motor bracket is used for limiting the movement of the control component, namely, the structure for fixing the vibration motor and the structure for fixing the control component are integrated, so that the structure is simplified, the cost is reduced, the production and assembly procedures are reduced, the structure is more stable, the space utilization rate in the capsule is improved, and the crowding in the vibration capsule is avoided.

Description

Vibration capsule

Technical Field

The utility model relates to the field of medical instruments, in particular to a vibration capsule.

Background

A vibrating capsule is a device for treating chronic functional constipation. When the vibration capsule is swallowed by a patient, the vibration capsule can continuously vibrate, shake and roll when passing through the intestinal tract, so that the muscle is stimulated, the intestinal tract is promoted to restart natural peristalsis, and constipation symptoms are relieved.

The vibration capsule generally comprises a shell, a vibration motor, a battery assembly and a control assembly, wherein the vibration motor, the battery assembly and the control assembly are all positioned in the shell, and the vibration motor and the battery assembly are electrically connected with the control assembly. The control assembly is usually arranged at the bottommost part of the shell, is limited to the small internal size of the shell, and is not easy to fix and limit. The vibration capsule requires an additional structural member for fixing the control assembly, thus increasing the cost and the production process and making the inner space of the housing more crowded.

Disclosure of Invention

The utility model aims to provide a vibrating capsule with a control assembly fixed by a motor bracket.

In order to achieve one of the above objects, an embodiment of the present utility model provides a vibration capsule, including a housing, a vibration motor, a battery assembly, and a control assembly, where the vibration motor, the battery assembly, and the control assembly are all located in the housing, the vibration motor and the battery assembly are all electrically connected to the control assembly, and the vibration capsule further includes a motor bracket for fixing the vibration motor, where the motor bracket has a first fixing portion that is matched with the motor bracket, and a second fixing portion that is matched with the control assembly.

As a further improvement of an embodiment of the present utility model, the control assembly includes a PCB board and a plurality of electronic devices mounted on two sides of the PCB board, an end portion of the first fixing portion abuts against the PCB board, an accommodating space is provided inside the first fixing portion, and the vibration motor is disposed in the accommodating space.

As a further improvement of an embodiment of the present utility model, the inner wall of the accommodating space clamps the vibration motor, and the accommodating space has an opening facing the PCB.

As a further improvement of an embodiment of the present utility model, the second fixing portion includes a plurality of fixing bars extending in a direction parallel to an axial direction of the housing, the plurality of fixing bars are disposed around the PCB, and a fixing groove is disposed at an outer circumference of the PCB to be engaged with the fixing bars.

As a further improvement of one embodiment of the present utility model, the groove wall of the fixing groove is circular arc.

As a further improvement of an embodiment of the present utility model, the battery assembly includes a battery unit and a connecting member connected to the battery unit, and the connecting member is electrically connected to the control assembly;

the vibration motor, the control assembly and the battery unit are sequentially arranged along the axial direction of the shell, the second fixing portion extends from one end, close to the control assembly, of the first fixing portion to one side, away from the vibration motor, of the control assembly, and one end, away from the first fixing portion, of the second fixing portion abuts against the battery unit.

As a further improvement of an embodiment of the present utility model, the control assembly includes a PCB board; the connecting piece comprises a first connecting piece connected with one end of the battery unit facing the PCB and a second connecting piece connected with one end of the battery unit facing away from the PCB;

the first connecting piece with the second connecting piece extends towards the vibrating motor, be provided with on the PCB board be used for with first connecting piece welded first welding part, with second connecting piece welded second welding part.

As a further improvement of an embodiment of the present utility model, the first connection member includes a first main body portion connected to an end of the battery unit toward the vibration motor and a first extension portion extending from the first main body portion toward the vibration motor;

the second connecting piece comprises a second main body part connected to one end of the battery unit, which is far away from the vibration motor, and a second extension part extending from the second main body part towards the vibration motor.

As a further improvement of one embodiment of the present utility model,

the battery assembly further comprises a first insulating piece arranged between the first main body part and the control assembly, and a second insulating piece arranged between the second extending part and the battery unit, wherein the first insulating piece and the second insulating piece are integrally arranged.

As a further improvement of an embodiment of the present utility model, the battery unit includes a first battery and a second battery distributed along an axial direction of the housing, the first battery is close to the PCB board with respect to the second battery, the second insulating member extends in a direction parallel to the axial direction of the housing, and one end of the second insulating member is connected to the first insulating member, and the other end of the second insulating member is located at a side of the second battery.

As a further improvement of an embodiment of the present utility model, the battery assembly further includes a battery connection structure connecting the first battery and the second battery, the battery connection structure having a soldering tab extending between the PCB board and the vibration motor, the soldering tab being for soldering with a wire of the vibration motor.

As a further improvement of an embodiment of the present utility model, the battery connection structure has a battery mating cavity that mates with the first battery, and the second battery is connected to a side of the battery connection structure facing away from the PCB board.

As a further improvement of one embodiment of the present utility model, the battery connecting structure has a relief opening that is relieved from the second extension portion.

Compared with the prior art, the utility model has the beneficial effects that: the control component is matched with the motor bracket, and the motor bracket is used for limiting the movement of the control component, namely, the structure for fixing the vibration motor and the structure for fixing the control component are integrated, so that the structure is simplified, the cost is reduced, the production and assembly procedures are reduced, the structure is more stable, the space utilization rate in the capsule is improved, and the crowding in the vibration capsule is avoided.

Drawings

FIG. 1 is a schematic view of a vibrating capsule according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a partially hidden vibrating capsule housing according to an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of A-A' of FIG. 2;

FIG. 4 is a cross-sectional view of B-B' of FIG. 2;

FIG. 5 is a front view of a control assembly according to an embodiment of the present utility model;

FIG. 6 is a top view of a control assembly according to an embodiment of the present utility model;

FIG. 7 is a schematic view of a motor support according to an embodiment of the present utility model;

FIG. 8 is a schematic diagram of a power module according to an embodiment of the present utility model;

FIG. 9 is a schematic diagram of a power supply module according to an embodiment of the utility model

FIG. 10 is a schematic diagram illustrating a third view of a power module according to an embodiment of the present utility model

10, a shell; 20. a motor bracket; 21. a first fixing portion; 211. an accommodating space; 212. a first receiving groove; 213. a second accommodating groove; 22. a second fixing portion; 221. a fixed rod; 30. a vibration motor; 40. a control assembly; 41. a PCB board; 411. a fixing groove; 412. a first welded portion; 413. a second welded portion; 42. an electronic device; 50. a battery assembly; 51. a battery unit; 511. a first battery; 512. a second battery; 52. a first connector; 521. a first body portion; 522. a first extension; 53. a second connector; 531. a second body portion; 532. a second extension; 54. a battery connection structure; 541. welding the tab; 542. an avoidance port; 55. a first insulating member; 56. and a second insulating member.

Detailed Description

The present utility model will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the utility model and structural, methodological, or functional modifications of these embodiments that may be made by one of ordinary skill in the art are included within the scope of the utility model.

In the various illustrations of the utility model, certain dimensions of structures or portions may be exaggerated relative to other structures or portions for convenience of illustration, and thus serve only to illustrate the basic structure of the inventive subject matter.

As shown in fig. 1, 2, 3 and 4, the present utility model provides a vibration capsule including a housing 10, a motor bracket 20, a vibration motor 30, a control assembly 40, and a battery assembly 50.

Wherein, the shell 10 is made of biocompatible materials, and a cavity is formed inside the shell 10. The housing 10 is formed by splicing a plurality of parts to facilitate assembly of the vibration capsule.

The vibration motor 30, the battery assembly 50 and the control assembly 40 are all located in the shell 10, and the vibration motor 30 and the battery assembly 50 are all electrically connected with the control assembly 40.

The motor bracket 20 is used to fix the vibration motor 30. As shown in fig. 2 and 7, the motor bracket 20 has a first fixing portion 21 for fittingly mounting the vibration motor 30, and a second fixing portion 22 for fittingly mounting the control unit 40.

The control assembly 40 of the present utility model is coupled to the motor bracket 20, and the movement of the control assembly 40 is restricted by the motor bracket 20. That is, the structure of the fixed vibration motor 30 and the structure of the fixed control assembly 40 are integrated, so that the structure is simplified, the cost is reduced, the production and assembly processes are reduced, the structure is more stable, the space utilization rate of the inside of the vibration capsule is improved, and the crowding of the inside of the vibration capsule is avoided.

The vibration motor 30 vibrates when started, so as to drive the vibration capsule to vibrate integrally, thereby stimulating the muscles of the user, promoting the intestinal tract to restart natural peristalsis, and relieving constipation symptoms.

The control assembly 40 is used to control the operation of the vibration motor 30. Along the axial direction of the housing 10, the vibration motor 30 is located at one side of the control assembly 40.

As shown in fig. 5 and 6, in an embodiment of the present utility model, the control assembly 40 includes a PCB board (Printed Circuit Board, printed wiring board) 41 and a plurality of electronic devices 42 mounted on both sides of the PCB board 41, and pads (pads and wires are not shown) for connection with wires of the vibration motor 30 are further provided on the PCB board 41. The illustrated electronic device 42 includes, but is not limited to, a chip.

The plate surface of the PCB 41 is substantially perpendicular to the axial direction of the case 10. To reduce the number or area of PCB boards in the vibration capsule, the two boards of the PCB board 41 are each mounted with an electronic device 42.

The motor bracket 20 is connected to the inner wall of the housing 10. Specifically, the outer periphery of the motor support 20 is provided with a slot, and the inner wall of the shell 10 is provided with an inserting block which is inserted into the slot.

As shown in fig. 3, an end of the first fixing portion 21 abuts against the PCB 41, a receiving space 211 is provided inside the first fixing portion 21, and the vibration motor 30 is provided in the receiving space 211.

In the process of assembling the vibration capsule, because the electronic device 42 has uneven heights, the control component 40 and the vibration motor 30 are easy to incline, the coaxiality of the internal structure of the vibration capsule cannot be ensured, and the assembly is greatly disturbed, so that the yield of the vibration capsule is seriously affected. In the vibration capsule assembly according to the above embodiment of the present utility model, the vibration motor 30 is first installed in the housing space 211, and the vibration motor 30 is fixed by the first fixing portion 21, so that the vibration motor 30 is prevented from tilting. Then, the control assembly 40 is matched with the second fixing part 22, and the end part of the first fixing part 21 abuts against the PCB 41 to prevent the control assembly 40 from tilting.

The inner wall of the accommodation space 211 holds the vibration motor 30. The receiving space 211 has an opening toward the PCB 41, which can be provided to avoid the electronic device 42 mounted on the side of the PCB 41 toward the vibration motor 30, and pass a wire connecting the vibration motor 30 and the PCB 41.

As shown in fig. 2 and 7, the second fixing portion 22 includes a plurality of fixing bars 221 extending in a direction parallel to the axial direction of the case 10, and the plurality of fixing bars 221 are disposed around the PCB board 41. The fixing lever 221 is used to cooperate with the PCB board 41 to restrict the radial movement of the control assembly 40 along the housing 10.

As shown in fig. 4 and 6, the outer circumference of the PCB board 41 is provided with a fixing slot 411 engaged with the fixing lever 221. The process of matching the second fixing portion 22 with the control assembly 40 is as follows: the staff moves the control assembly 40 and the motor bracket 20 relatively, so that the fixing rod 221 passes through the fixing slot 411 of the PCB 41 until the end part of the first fixing part 21 abuts against the board surface of the PCB 41, then the PCB 41 and the motor bracket 20 are reinforced by glue, and the PCB 41 is prevented from being separated from the motor bracket 20 along the axial direction of the shell 10.

Specifically, the slot wall of the fixing slot 411 is circular arc, which means that the projection of the fixing slot 411 on the board surface of the PCB 41 is circular arc, and no corner exists in the fixing slot 411, so that the fixing rod 221 is convenient to be matched with the fixing slot 411.

As shown in fig. 8, 9 and 10, in an embodiment of the present utility model, the battery assembly 50 includes a battery cell 51, a connection member, a battery connection structure 54, a first insulating member 55, and a second insulating member 56.

The battery unit 51 is used to supply power required for the operation of the vibration motor 30. The battery unit 51 includes at least one battery. The battery is preferably a silver oxide battery.

The vibration motor 30, the control assembly 40 and the battery unit 51 are sequentially arranged along the axial direction of the shell 10, the second fixing portion 22 extends from one end of the first fixing portion 21 close to the control assembly 40 to one side of the control assembly 40 away from the vibration motor 30, and one end of the second fixing portion 22 away from the first fixing portion 21 abuts against the battery unit 51. In the above scheme, the second fixing portion 22 abuts against the battery unit 51, so that the battery unit 51 is prevented from being directly pressed onto the electronic device 42 of the control assembly 40, faults such as cold welding with the PCB 41 due to extrusion of the battery pack cannot occur to the electronic device 42, coaxiality of the vibration motor 30, the motor bracket 20 and the battery assembly 50 cannot be affected due to the fact that the heights of the electronic device 42 are different, and the axial distance between the battery assembly 50 and the motor bracket 20 is ensured to be fixed.

The connecting member is connected to the battery unit 51, and the connecting member is electrically connected to the control assembly 40. That is, the battery unit 51, the connector, the control unit 40, and the vibration motor 30 are sequentially connected to realize electrical conduction.

Specifically, the connectors include a first connector 52 connected to an end of the battery unit 51 facing the PCB board 41, and a second connector 53 connected to an end of the battery unit 51 facing away from the PCB board 41. The first connecting piece 52 and the second connecting piece 53 are made of metal.

The first and

second connection members

52 and 53 extend toward the vibration motor 30. As shown in fig. 4 and 6, the PCB 41 is provided with a first soldering portion 412 to be soldered with the first connector 52 and a second soldering portion 413 to be soldered with the second connector 53. The electrical conduction between the battery assembly 50 and the control assembly 40 is achieved by welding the first connecting member 52 and the first welding portion 412, and welding the second connecting member 53 and the second welding portion 413, and the battery assembly 50 and the control assembly 40 are fixed together. Since the welding of the battery assembly 50 and the control assembly 40 is on the same side of the battery assembly 50, the structure formed after the welding of the battery assembly 50 and the control assembly 40 is more stable.

The first welding portion 412 and the second welding portion 413 are holes penetrating through the PCB board 41, and the ends of the first connecting piece 52 and the second connecting piece 53, which are far away from the battery unit 51, extend into the holes, and then are welded, so that the first connecting piece 52 and the second connecting piece 53 are respectively connected with the walls of the holes to form an integral structure.

Specifically, as shown in fig. 10, the first connection member 52 includes a first main body portion 521 and a first extension portion 522. The first body portion 521 is connected to an end of the battery unit 51 facing the vibration motor 30, and the first body portion 521 has an overall shape of a plate body parallel to the PCB board 41. The first extension 522 extends from an end of the first body 521 toward the vibration motor 30, and the first extension 522 is integral with the first body 521.

The second connection member 53 includes a second main body portion 531 and a second extension portion 532. The second body portion 531 is connected to an end of the battery unit 51 facing away from the vibration motor 30, and the second body portion 531 has an overall shape of a plate body parallel to the PCB board 41. The second extension portion 532 extends from an end portion of the second body portion 531 laterally toward the vibration motor 30 along the battery unit 51, and the second extension portion 532 is provided opposite to the first extension portion 522. The second extension 532 is integral with the second body 531.

As shown in fig. 7, a first receiving groove 212 for receiving one end of the first connector 52 away from the battery unit 51 and a second receiving groove 213 for receiving one end of the second connector 53 away from the battery unit 51 are provided on a side of the first fixing portion 21 facing the PCB board 41. The first and second receiving

grooves

212 and 213 provide a space required for a soldering process for connecting the connector to the PCB board 41.

In a preferred embodiment of the present utility model, the battery unit 51 includes a first battery 511 and a second battery 512, the first battery 511 and the second battery 512 are distributed along the axial direction of the housing 10, and the first battery 511 is close to the PCB board 41 with respect to the second battery 512. The first battery 511 and the second battery 512 may be constituted by a single battery or may be constituted by a plurality of batteries connected in series.

The battery connection structure 54 connects the first battery 511 and the second battery 512. Specifically, the battery connection structure 54 has a battery mating cavity that mates with the first battery 511, and the second battery 512 is connected to a side of the battery connection structure 54 facing away from the PCB board 41. The battery connection structure 54 is made of metal, the connection between the first battery 511 and the battery connection structure 54 is preferably welded, and the connection between the second battery 512 and the battery connection structure 54 is preferably welded. In assembling the battery assembly 50, the first battery 511 is first installed in the battery mating cavity, and then the second battery 512 is welded to the battery connecting structure 54. The battery mating cavity may function to locate the first battery 511 and promote the robustness of the connection of the first battery 511 with the battery connection structure 54.

The battery connection structure 54 has a bonding pad 541 extending between the PCB board 41 and the vibration motor 30, and the bonding pad 541 is to be bonded to a wire (wire is not shown) of the vibration motor 30.

One wire of the vibration motor 30 is soldered to a pad on the PCB board 41, and the other wire is soldered to a bonding pad 541 of the battery connection structure 54. And because both ends of the battery unit 51 are electrically connected with the PCB board 41, the battery connection structure 54 connects the first battery 511 and the second battery 512, so that one ends of the first battery 511 and the second battery 512 are electrically connected with the vibration motor 30 through the PCB board 41, and the other ends of the first battery 511 and the second battery 512 are electrically connected with the vibration motor 30 through the battery connection structure 54, and the first battery 511 and the second battery 512 can selectively supply power to the vibration motor 30 under the control of the control component 40. In addition, the two wires of the vibration motor 30 do not need to cross the battery assembly 50, the wires do not need to pass through between the battery assembly 50 and the inner wall of the housing 10, and the assembly of the vibration capsule is more convenient.

Further, the solder sheet 541 passes through the side of the PCB 41.

Further, the battery connecting structure 54 has a relief port 542 that vents away from the second extension 532 to avoid the second extension 532 from contacting the battery connecting structure 54, thereby preventing a short circuit. The escape port 542 is provided at a radial position of the battery connecting structure 54 and communicates with the battery accommodating chamber.

The first insulator 55 is disposed between the first body portion 521 and the control assembly 40, and the first insulator 55 serves to prevent the battery unit 51, the first body portion 521, and the electronics 42 of the control assembly 40 from contacting.

The second insulator 56 is disposed between the second extension 532 and the battery cell 51. The second insulator 56 prevents the second extension 532 from being in contact with the surface of the battery cell 51 to short-circuit. The first insulating member 55 is integrally provided with the second insulating member 56 to simplify the structure.

Specifically, the second insulating member 56 extends in a direction parallel to the axial direction of the housing 10, and one end of the second insulating member 56 is connected to the first insulating member 55, and the other end of the second insulating member 56 is located laterally of the second battery 512, i.e., the other end of the second insulating member 56 extends to a position beyond the first battery 511, thereby preventing the second insulating member 56 from contacting the battery connecting structure 54. The second insulating member 56 is sandwiched between the battery cell 51 and the second extension 532, so that the second insulating member 56 and the first insulating member 55 are positionally fixed with respect to the battery cell 51.

In summary, the assembly process of the internal structure of the vibration capsule according to an embodiment of the present utility model is as follows:

(1) The vibration motor 30 is installed in the accommodating space 211, so that the vibration motor 30 is fixed on the motor bracket 20, and the vibration motor 30 and the motor bracket 20 are stuck together by glue to strengthen the connection of the two.

(2) The control assembly 40 and the motor bracket 20 are moved relatively, so that the fixing rod 221 of the second fixing portion 22 passes through the fixing slot 411 of the PCB 41 until the end portion of the first fixing portion 21 abuts against the board surface of the PCB 41, and then the PCB 41 and the motor bracket 20 are reinforced by glue.

(3) Fixing the assembled component and battery assembly 50 in the step (2) to a proper position through a fixture, wherein the fixing rod 221 abuts against the battery unit 51, namely the assembled component and battery assembly 50 in the step (2) is positioned at the proper position.

(4) The first and

second connection members

52 and 53 are welded to the PCB board 41, and the two wires of the vibration motor 30 are respectively welded to the pads and the welding pieces 541 on the PCB board 41, thereby connecting the vibration motor 30, the control assembly 40, the battery assembly 50, and the motor bracket 20 together.

The vibration motor 30, the control assembly 40, the battery assembly 50 and the motor bracket 20 are connected together to form an integral structure, so that the stability of the internal components of the vibration capsule is improved. The assembled integral structure is integrally arranged in the shell 10, thus completing the assembly of the whole vibration capsule. Since the two wires of the vibration motor 30 do not cross the battery assembly 50, the width of the above-described overall structure at the location of the battery assembly 50 does not increase, and thus the above-described overall structure is more easily incorporated into the housing 10.

In another embodiment of the utility model, electronics 42 may also include a reed switch. Other portions of the present embodiment are the same as those of the above embodiment.

The above list of detailed descriptions is only specific to practical embodiments of the present utility model, and they are not intended to limit the scope of the present utility model, and all equivalent embodiments or modifications that do not depart from the spirit of the present utility model should be included in the scope of the present utility model.

Claims

1. The utility model provides a vibration capsule, includes casing, vibrating motor, battery pack, control assembly all are located in the casing, vibrating motor with battery pack all with control assembly electric connection, its characterized in that, vibrating capsule still includes the motor support that is used for fixing vibrating motor, the motor support have with motor support complex first fixed part, with control assembly complex second fixed part.

2. The vibration capsule according to claim 1, wherein the control assembly comprises a PCB board and a plurality of electronic devices mounted on both sides of the PCB board, the end of the first fixing portion abuts against the PCB board, a receiving space is provided inside the first fixing portion, and the vibration motor is disposed in the receiving space.

3. The vibrating capsule of claim 2, wherein an inner wall of the receiving space clamps the vibrating motor, the receiving space having an opening toward the PCB.

4. The vibration capsule according to claim 2, wherein the second fixing portion includes a plurality of fixing bars extending in an axial direction parallel to the housing, the plurality of fixing bars being disposed around the PCB board, and a periphery of the PCB board being provided with fixing grooves fitted with the fixing bars.

5. The vibration capsule of claim 4, wherein the walls of the fixing groove are circular arc-shaped.

6. The vibration capsule of claim 1, wherein the battery assembly comprises a battery cell and a connector connected to the battery cell, the connector being electrically connected to the control assembly;

7. The vibration capsule of claim 6, wherein the control assembly comprises a PCB board; the connecting piece comprises a first connecting piece connected with one end of the battery unit facing the PCB and a second connecting piece connected with one end of the battery unit facing away from the PCB;

8. The vibration capsule of claim 7, wherein the first connector includes a first body portion connected to an end of the battery unit toward the vibration motor and a first extension portion extending from the first body portion toward the vibration motor;

9. The vibration capsule of claim 8, wherein the battery assembly further comprises a first insulator disposed between the first body portion and the control assembly, a second insulator disposed between the second extension portion and the battery cell, the first insulator integrally disposed with the second insulator.

10. The vibration capsule according to claim 9, wherein the battery unit includes a first battery and a second battery distributed along an axial direction of the housing, the first battery is close to the PCB board with respect to the second battery, the second insulating member extends in a direction parallel to the axial direction of the housing, and one end of the second insulating member is connected to the first insulating member, and the other end of the second insulating member is located at a side of the second battery.

11. The vibration capsule of claim 10, wherein the battery assembly further comprises a battery connection structure connecting the first battery and the second battery, the battery connection structure having a solder tab extending between the PCB and the vibration motor, the solder tab being configured to be soldered with a wire of the vibration motor.

12. The vibration capsule of claim 11, wherein the battery connection structure has a battery mating cavity that mates with the first battery, the second battery being connected to a side of the battery connection structure facing away from the PCB.

13. The vibration capsule of claim 11, wherein the battery connection structure has a relief port that vents the second extension.