WO2009084480A1

WO2009084480A1 - Structure for receiving button cell battery, and electronic apparatus

Info

Publication number: WO2009084480A1
Application number: PCT/JP2008/073199
Authority: WO
Inventors: Masayoshi Nakajima; Fumitaka Tokuda
Original assignee: Ishida Co., Ltd.
Priority date: 2007-12-28
Filing date: 2008-12-19
Publication date: 2009-07-09
Also published as: JP2009158439A

Abstract

A structure for receiving a button cell battery, the structure protecting the battery from the outside and having a reduced size. An electronic apparatus (1) has a case body (20) having a rear face in which an opening (28) is formed. The case body (20) is provided with a battery receiving section (27) for receiving the button cell battery inserted from the opening (28). The case body (20) is formed integrally with a spacer (40) placed in the gap between a protective seal affixed to the case body (20) so as to cover the opening (28) and the battery in the battery receiving section (27).

Description

Button battery storage structure and electronic device

The present invention relates to a storage structure for a button battery and an electronic device including the storage structure.

As described in Patent Documents 1 to 3, various techniques have been proposed for button battery storage structures.

JP-A-10-302743 JP-A-10-15496 JP-A-9-274898

In recent years, downsizing of devices has progressed, and a button battery storage structure is desired to be as small as possible.

On the other hand, if the button battery is exposed to the outside, it may cause ignition, so it is necessary to sufficiently protect the button battery from the outside.

The present invention has been made in view of the above points, and an object of the present invention is to provide a technology capable of miniaturizing the storage structure of the button battery while protecting the button battery from the outside.

In order to solve the above problems, a first aspect of a button battery storage structure according to the present invention includes an opening and a case main body including a battery storage for storing a button battery inserted from the opening; And a spacer integrally formed with the case body, which is disposed in a gap between a seal attached to the case body so as to cover the opening and the button battery in the battery housing.

Further, a second aspect of the button battery storage structure according to the present invention is the first aspect, wherein the spacer is connected to the neck and a flexible neck extending from the case body into the opening. And a main body provided in the opening, and the main body has a region facing the neck.

Further, a third aspect of the button battery storage structure according to the present invention is any one of the first and second aspects, and the spacer is formed with a hole exposing the surface of the button battery. Has been.

Moreover, the 4th aspect of the storage structure of the button battery which concerns on this invention is a 3rd aspect, Comprising: The said hole is formed in the shape which shows the polarity of the surface of the said button battery exposed by the said hole. .

In addition, a fifth aspect of the button battery storage structure according to the present invention is the first aspect, wherein the spacer is connected to the neck and a flexible neck extending from the case body into the opening. And a main body portion provided in the opening portion, and a notch portion located on an extension line from the neck portion along a direction in which the neck portion extends is provided on a peripheral edge of the main body portion.

In addition, the electronic device according to the present invention includes a button battery, a case main body having an opening and a battery storage for storing the button battery inserted from the opening, and the case so as to cover the opening. A seal affixed to the main body, and a spacer integrally formed with the case main body, which is disposed in a gap between the seal and the button battery in the battery housing, and the seal includes the opening. Affixed to the spacer and the case body so as to cover.

According to the first to fifth aspects of the button battery storage structure according to the present invention, the spacer disposed in the gap between the seal attached to the case main body and the button battery in the battery storage portion is provided. Therefore, a seal can be attached to the spacer. Therefore, the contact area between the seal and the region where it is attached can be increased. Therefore, the seal is difficult to peel off, and the sealing degree of the button battery storage structure can be increased. As a result, the button battery can be sufficiently protected from the outside. Furthermore, since the spacer is integrally formed with the case main body, an attachment structure between the spacer and the case main body becomes unnecessary, and the button battery storage structure can be downsized.

In particular, according to the second aspect, in the spacer, since the main body portion has a region facing the neck portion, the region in which the spacer fills the gap between the seal and the button battery is increased by the amount of the region. Can do. Therefore, even if the neck is lengthened to prevent the neck from being damaged when the button battery is stored in the battery storage while turning the main body up, the contact area between the seal and the area where it is attached is secured. It is possible to prevent the seal from being easily peeled off.

In particular, according to the third aspect, since the hole for exposing the surface of the button battery is formed in the spacer, the button battery can be easily inspected using the hole.

In particular, according to the fourth aspect, since the hole provided in the spacer is formed in a shape indicating the polarity of the surface of the button battery exposed through the hole, the button battery can be connected to the battery housing portion without making a mistake in polarity. Can be stored.

In particular, according to the fifth aspect, the peripheral edge of the main body portion is provided with a notch portion located on an extension line from the neck portion along the direction in which the neck portion extends. The main body can be easily turned up by inserting tools and the like. Therefore, the button battery can be easily stored in the battery storage unit.

Moreover, according to the electronic device of the present invention, the electronic device can be reduced in size while protecting the button battery from the outside.

The objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description and the accompanying drawings.

It is a front view which shows the electronic device which concerns on embodiment of this invention. It is a perspective view which shows the structure of the electronic device which concerns on embodiment of this invention from the back side. It is a perspective view which shows the structure of the electronic device which concerns on embodiment of this invention from the back side in the state which peeled off the protective seal | sticker. It is a top view which expands and shows the back surface structure of the electronic device which concerns on embodiment of this invention in the state which peeled off the protective seal | sticker. It is a figure which shows the cross-section of the electronic device which concerns on embodiment of this invention. It is a perspective view which shows the structure of the negative electrode terminal which concerns on embodiment of this invention. It is a perspective view which shows the structure of the plus electrode terminal which concerns on embodiment of this invention. It is a side view which shows a mode that the plus electrode terminal which concerns on embodiment of this invention was mounted in the printed circuit board. It is sectional drawing which shows a mode that a button battery is put in a case main body. It is sectional drawing which shows a mode that a button battery is put in a case main body. It is sectional drawing which shows a mode that a button battery is put in a case main body. It is sectional drawing which shows a mode that a button battery is put in a case main body. It is a top view which shows the back surface structure of the electronic device which concerns on embodiment of this invention at the time of shortening the neck part of a spacer and not providing an opposing area | region with a neck part in a main-body part. It is a top view which shows the back surface structure of the electronic device which concerns on embodiment of this invention when the neck part of a spacer is lengthened and the opposing area | region with a neck part is not provided in a main-body part. It is a top view which shows the back surface structure of the modification of the electronic device which concerns on embodiment of this invention.

FIG. 1 is a front view showing an electronic apparatus 1 according to an embodiment of the present invention. The electronic device 1 according to the present embodiment is an electronic shelf label used in, for example, an electronic shelf label system (ESL system / Electronic Label System) installed in a store such as a supermarket or a convenience store. The electronic shelf label is attached to a product shelf or the like in the store, and is arranged corresponding to the product. The electronic shelf label displays product information related to the corresponding product, such as the selling price and product name of the corresponding product. In stores such as supermarkets, the selling price of products in the store is centrally managed by a product master stored in a POS system or the like. In the electronic shelf label system, data indicating the selling price based on the product master is transmitted from the server to the electronic shelf label, and the selling price is displayed on the display screen of the electronic shelf label. Thus, the correct selling price that matches the selling price at the time of settlement is displayed on the electronic shelf label, and the correct selling price is transmitted to the customer.

The X-axis direction and the Y-axis direction shown in FIG. 1 indicate directions along the horizontal direction and the vertical direction of the display screen of the electronic device 1 as an electronic shelf label, respectively. Further, the direction toward the positive side of the Y axis is a direction approaching the upper side of the display screen of the electronic apparatus 1, and the direction toward the negative side of the Y axis approaches the lower side of the display screen of the electronic apparatus 1. Direction. Hereinafter, the positive side and the negative side of the Y axis are referred to as “+ Y side” and “−Y side”, respectively.

As shown in FIG. 1, an electronic device 1 according to the present embodiment includes a display 5 that displays various information and a communication unit 6 that performs communication between a server that transmits product information on the front surface. I have.

The display 5 is a non-volatile display unit of a dot matrix system, and is composed of, for example, electronic paper. In a non-volatile display unit such as electronic paper, display contents can be held without applying driving power. Since the display 5 is a dot-matrix display unit, it can display not only numerical values indicating the selling price of products but also characters, symbols, figures, and the like. For example, as shown in FIG. 1, the display 5 includes a product name that is information (hereinafter referred to as “product specifying information”) that can identify the product, together with the selling price 51 of the product associated with the device. 50 and a product code 52 (more precisely, a bar code indicating a product code) are displayed.

In addition, the electronic apparatus 1 according to the present embodiment includes a control unit 7 composed of a microcomputer or the like and a memory 8 therein. The memory 8 stores various types of information such as selling price to be displayed on the display 5 and product specifying information. Information such as the selling price transmitted from the server is received by the communication unit 6, temporarily stored in the memory 8, and then displayed on the display 5 under the control of the control unit 7. As will be described later, a button battery 11 is provided in the electronic device 1, and power is supplied from the button battery 11 to the display 5, the communication unit 6, the control unit 7, and the memory 8. The display 5, the communication unit 6, the control unit 7, the memory 8 and the button battery 11 are housed in the case 2. The front surface of the case 2 is partially open so that the display screen of the display 5 is exposed. The button battery 11 can be taken out from the case 2, and the electronic device 1 is configured so that the button battery 11 can be replaced.

FIG. 2 is a perspective view showing the structure of the electronic apparatus 1 according to the present embodiment from the back side. FIG. 3 is a perspective view showing the structure of the electronic apparatus 1 from the back side in a state where the protective seal 10 shown in FIG. 2 is peeled off. 4 is an enlarged plan view showing the back structure of the electronic device 1 with the protective seal 10 peeled off, and FIG. 5 is a cross-sectional view of the electronic device 1 taken along the line AA in FIG. It is. Note that FIG. 3 shows the electronic device 1 in a state where the button battery 11 is removed from the case 2.

As shown in FIGS. 2 and 3, in the case 2 of the electronic device 1, a holder attachment portion 21 for attaching a holder for fixing the electronic device 1 to the product shelf on the back surface of the case body 20 by a slide-in method. To 23 and a holder lock section 24 are provided. The holder mounting portions 21 to 23 and the holder lock portion 24 are integrally formed with the case body 20. The case body 20 is configured by combining a first case body 20a on the front side and a second case body 20b on the back side. An opening is formed in the front surface of the first case body 20a, and the display screen of the display 5 is exposed from the opening.

The

holder mounting portions

21 and 23 are arranged so as to face each other with a central region in the X-axis direction on the back surface of the case body 20 in between. The holder mounting portion 21 is composed of a first portion 21a and a second portion 21b. The first portion 21 a is a plate-like portion extending along the Y-axis direction, and is erected on the back surface of the case body 20. The second portion 21b is a plate-like portion having the same length as the first portion 21a and extending along the Y-axis direction, and is an end portion of the first portion 21a so as to be parallel to the back surface of the case body 20. Projecting toward the holder mounting portion 23. And the space enclosed by the back surface of the case main body 20, the 1st part 21a, and the 2nd part 21b becomes the insertion space 21c in which a part of holder is inserted.

The holder mounting portion 23 is composed of a first portion 23a and a second portion 23b. The first portion 23 a is a plate-like portion that extends along the Y-axis direction and is shorter than the first portion 21 a of the holder mounting portion 21. The first portion 23a is erected on the back surface of the case body 20 so as to face the −Y side end portion of the first portion 21a. The second portion 23b is a plate-like portion having the same length as the first portion 23a extending along the Y-axis direction, and is an end portion of the first portion 23a so as to be parallel to the back surface of the case body 20. Projecting toward the holder mounting portion 21. A space surrounded by the back surface of the case body 20, the first portion 23a, and the second portion 23b is an insertion space 23c into which a part of the holder is inserted.

The holder mounting portion 22 is an end portion on the + Y side on the back surface of the case main body 20, and is disposed in the central region in the X-axis direction on the back surface of the case main body 20. The holder mounting portion 22 is composed of a first portion 22a and a second portion 22b. The first portion 22a is a plate-like portion having substantially the same length as the first portion 23a of the holder mounting portion 23, and is erected on the back surface of the case body 20 so as to extend along the X-axis direction. . The second portion 22b is a plate-like portion having a length that is approximately half the length of the first portion 22a, and extends from the end of the first portion 22a to the -Y side so as to be parallel to the back surface of the case body 20. Projecting toward you.

On the back surface of the case body 20, a region between the

holder mounting portions

21 and 23 is recessed at the −Y side end, and a recess 25 is formed in the region. The holder lock portion 24 is integrally formed with the case body 20 so as to protrude from the + Y side surface of the recess 25 toward the −Y side. The holder lock portion 24 includes a flexible plate-like portion 24a connected to the case body 20 and an engaging claw portion 24b connected to the plate-like portion 24a that engages with the holder. The main surface on the back side of the case body 20 in the plate-like portion 24a, in other words, the main surface opposite to the main surface on the concave portion 25 side is located in the same plane as the back surface of the case body 20, and The main surface on the back side of the case main body 20 in the claw portion 24 b protrudes outward from the back surface of the case main body 20. When a force to push down the engaging claw portion 24b is applied, the flexible plate-like portion 24a connected to the engaging claw portion 24b bends, and the engaging claw portion 24b is accommodated in the recess 25. The claw portion 24 b does not protrude beyond the back surface of the case body 20.

When the holder is slid on the back surface of the case body 20 so that both end portions in the X-axis direction of the holder are inserted into the

insertion spaces

21c and 23c from the -Y side, the holder becomes an engaging claw portion of the holder lock portion 24. It progresses toward the 1st part 22a of the holder attaching part 22, pushing down 24b. When the holder comes into contact with the first portion 22a of the holder mounting portion 22, the holder gets over the engaging claw portion 24b. If it does so, the bending of the plate-shaped part 24a will disappear, and the engaging claw part 24b will protrude from the back surface of the case main body 20. FIG. As a result, the engaging claw portion 24b comes to engage with the end portion on the −Y side of the holder from the −Y side, and the holder cannot slide to the + Y side or the −Y side. Thereby, the holder is fixed to the case 2. When removing the holder fixed to the case 2, the holder is slid on the back surface of the case body 20 toward the −Y side with the engaging claw portion 24 b of the holder lock portion 24 pressed down.

In this way, by separately forming the holder attachment portions 21 to 23 and the holder lock portion 24 for attaching the holder to the electronic device 1 with the case main body 20, a component for attaching the holder is prepared separately from the electronic device 1. This eliminates the need to reduce the amount of work when attaching the electronic device 1 to the product shelf. Further, by integrally molding the case body 20 and the structure for attaching the holder, the electronic device 1 having the structure can be manufactured at low cost.

In the electronic device 1 according to the present embodiment, as shown in FIG. 2, a protective seal 10 that protects the button battery 11 and the electronic components in the case body 20 from the outside is attached to the back surface of the case body 20. It is done. A region 26 (hereinafter referred to as “seal application region 26”) on the back surface of the case body 20 to which the protective seal 10 is attached is slightly recessed by the thickness of the protective seal 10 as shown in FIG. Yes. Therefore, when the protective seal 10 is affixed to the case main body 20, it is possible to suppress the occurrence of a step at the boundary between the case main body 20 and the protective seal 10, and the protective seal 10 is difficult to peel off.

The seal pasting area 26 is provided with a substantially circular opening 28 for inserting the button battery 11 into the case body 20. In the case body 20, a battery storage unit 27 that stores the button battery 11 that is inserted from the opening 28 is provided.

As shown in FIG. 5, a printed circuit board 30 on which various electronic components constituting the communication unit 6, the control unit 7, the memory 8, and the like are mounted in the first case body 20 a on the front surface side of the case body 20. Has been placed. On the printed circuit board 30, a plus electrode terminal 31 that contacts the plus electrode of the button battery 11 and a minus electrode terminal 32 that contacts the minus electrode of the button battery 11 are mounted.

The button battery 11 has a substantially cylindrical shape. In the button battery 11, the first main surface 11a and the side surface 11b constitute a positive electrode, and the second main surface 11c opposite to the first main surface 11a is a negative electrode. 4 and 5, the plus electrode terminal 31 and the minus electrode terminal 32 on the printed circuit board 30 are in contact with the side surface 11b and the second main surface 11c of the button battery 11, respectively.

A partition wall 35 extending from the inner surface of the second case body 20b to the printed circuit board 30 is provided in the case body 20 so as to partially surround the periphery of the opening 28 when viewed from the back side of the case body 20. Is provided. The partition wall 35 is integrally formed with the second case body 20b. In the case body 20, two columnar column portions 36 extending from the inner surface of the second case body 20b toward the printed circuit board 30 are provided. These column portions 36 are integrally formed with the second case body 20b and reach the portion of the positive electrode terminal 31 that is soldered to the printed circuit board 30. The portion is pressed against the printed circuit board 30 side. Yes. The battery housing portion 27 according to the present embodiment is a portion connected to the opening portion 28 surrounded by the printed circuit board 30, the partition wall 35, and the positive electrode terminal 31.

In the electronic apparatus 1 according to the present embodiment, the spacer 40 is provided in the gap between the protective seal 10 that covers the opening 28 and is attached to the seal application region 26 and the button battery 11 that is stored in the battery storage unit 27. It has been. The spacer 40 is a plate-like portion that fills most of the opening 28 so as to be in contact with the first main surface 11 a of the button battery 11, and is integrally formed with the case body 20. The spacer 40 has the same thickness as the portion of the case main body 20 to which the protective seal 10 is attached, and the main surface of the spacer 40 on the back side of the case main body 20 has no step difference from the seal attachment region 26. Thus, it is located in the same plane as the seal pasting area 26.

The spacer 40 includes a flexible neck 40 a extending from the case main body 20 into the opening 28 and a main body 40 b connected to the neck 40 a and provided in the opening 28. When the main body portion 40b is turned up, the flexible neck portion 40a is bent, the main body portion 40b is turned up, and most of the opening portion 28 is exposed. In this state, the button battery 11 is inserted into the case body 20 through the opening 28 and stored in the battery storage unit 27.

As shown in FIGS. 3 to 5, a cutout portion 40d is provided on the periphery of the main body portion 40b. As shown in FIG. 4, the cutout portion 40 d is located on an extension line from the neck portion 40 a along the direction DR in which the neck portion 40 a extends from the case body 20. The main body 40b can be easily turned up by inserting a jig or the like into the notched portion 40d and pushing up the main body 40b from the back surface with the jig or the like. Therefore, the button battery 11 can be easily stored in the battery storage unit 27.

Further, as shown in FIG. 4, two opposing regions 40bb that are opposed to each other with the neck 40a interposed therebetween are provided on the peripheral edge of the main body 40b. Each of the two facing regions 40bb faces the neck 40a.

A circular inspection hole 40c is formed in the central portion of the main body portion 40b, and the first main surface 11a of the button battery 11 is exposed through the inspection hole 40c. Therefore, the potential of the positive electrode of the button battery 11 can be easily measured by inserting a voltage measurement probe into the inspection hole 40c and bringing the probe into contact with the first main surface 11a of the button battery 11. it can. The negative electrode terminal 32 is disposed immediately below the inspection hole 40c.

Two protrusions 45 projecting into the opening 28 are provided on the periphery of the opening 28. These protrusions 45 are integrally formed with the case body 20. Each protrusion 45 has the same thickness as the portion of the case body 20 to which the protective seal 10 is attached. The surface of the protrusion 45 on the back side of the case body 20 has a step difference from the seal attachment region 26. The seal sticking region 26 is located in the same plane so as not to occur. The two protrusions 45 are located in the vicinity of the cutout portion 40 d of the spacer 40. In a state where the button battery 11 is stored in the battery storage portion 27, the two protrusions 45 are located on the peripheral edge portion of the first main surface 11 a of the button battery 11 and are in contact with the peripheral edge portion.

The case body 20 has a wall portion 46 which is located on the peripheral edge portion of the first main surface 11a of the button battery 11 stored in the battery storage portion 27 and abuts on the peripheral edge portion. The wall portion 46 is connected to the neck portion 40 a of the spacer 40, and is provided at a position facing the two protruding portions 45 with the spacer 40 interposed therebetween. Accordingly, in the button battery 11, a part of the peripheral part thereof is pressed against the printed circuit board 30 side by the wall part 46, and the other part of the peripheral part facing the part of the peripheral part is printed by the two protrusions 45. Pressed against the substrate 30 side. Thereby, the button battery 11 is fixed in the battery housing part 27, and the button battery 11 can be prevented from jumping out of the battery housing part 27. The positive electrode terminal 31 is disposed below the wall portion 46.

Thus, in this Embodiment, since the 1st main surface 11a of the button battery 11 is hold | suppressed with the projection part 45 and the wall part 46, since the protective seal 10 is affixed on the projection part 45 and the wall part 46, it is. A gap is formed between the first main surface 11 a of the button battery 11 and the protective seal 10. In the state where this gap is generated, the contact area between the protective seal 10 and the case 2 is small, and the protective seal 10 is easily peeled off. Further, when the portion of the protective seal 10 above the button battery 11 is pressed, the peripheral edge of the protective seal 10 is turned up, and the protective seal 10 is easily peeled off.

Therefore, as described above, the spacer 40 is disposed in the gap between the button battery 11 and the protective seal 10. Thereby, the contact area of the protective seal 10 and the area | region where it is affixed can be increased, and the protective seal 10 becomes difficult to peel off. As a result, components inside the case body 20 such as the button battery 11 can be reliably protected from the outside.

Note that when the protective seal 10 is peeled off, if the protective seal 10 is turned up from the vicinity of the notch 40d of the spacer 40, the spacer 40 is also turned up together, and the protective seal 10 is difficult to peel off. Therefore, when the protective seal 10 is peeled off for replacement of the button battery 11, the protective seal 10 is turned up near the neck 40a of the spacer 40, and the protective seal 10 is peeled off toward the notch 40d. As a result, the spacer 40 is hardly turned up, and the protective seal 10 is easily peeled off.

Next, the structure of the plus electrode terminal 31 and the minus electrode terminal 32 mounted on the printed board 30 will be described in detail. FIG. 6 is a perspective view showing the structure of the negative electrode terminal 32. As shown in FIG. 6, the negative electrode terminal 32 includes a fixing portion 320 that is fixed to the printed circuit board 30 and a pair of

support portions

321 and 322 that support the button battery 11 from the second main surface 11 c side. ing. The fixing portion 320 is a substantially rectangular plate-shaped portion, and both end portions in the longitudinal direction are soldered to the printed circuit board 30.

The support portion 321 extends from the central portion of one long side of the fixing portion 320 toward the outer side obliquely upward, and the tip portion 321a is horizontal. The support portion 321 is bifurcated from the center portion to the tip. A protrusion 321 b that contacts the second main surface 11 c of the button battery 11 is provided on the upper surface of each of the two divided tip portions 321 a in the support portion 321.

Similarly, the support portion 322 extends from the central portion of the other long side of the fixed portion 320 toward the outer side obliquely upward, and its tip portion 322a is horizontal. The support portion 322 is bifurcated from the central portion to the tip. A protrusion 322 b that contacts the second main surface 11 c of the button battery 11 is provided on the upper surface of each of the two divided tip portions 322 a in the support portion 322.

In the negative electrode terminal 32 having such a structure, the pair of

support portions

321 and 322 connect the button battery 11 to the second main surface 11c so that the protruding

portions

321b and 322b are in contact with the second main surface 11c of the button battery 11. Support from the side. The button battery 11 is housed in the battery housing portion 27 while pressing the negative electrode terminal 32 against the printed circuit board 30, so that the negative electrode terminal 32 has a bent portion at the boundary between the support portion 321 and the fixing portion 320, and a support. The bent portion at the boundary between the portion 322 and the fixed portion 320 is elastically deformed, and the bent portion at the boundary between the horizontal tip portion 321a and the inclined portion connected thereto in the support portion 321 and the horizontal tip in the support portion 322 The bent portion at the boundary between the portion 322a and the inclined portion connected to the portion 322a is elastically deformed, and the back surfaces of the

support portions

321 and 322 come into contact with the printed circuit board 30 (see FIG. 5). As a result, the

support portions

321 and 322 press the button battery 11 against the protrusion 45 and the wall portion 46, the button battery 11 comes into contact with the protrusion 45 and the wall portion 46, and the negative electrode terminal 32 and the button battery 11 are in contact with each other. A sufficient contact can be ensured.

7 is a perspective view showing the structure of the plus electrode terminal 31, and FIG. 8 is a side view showing a state in which the plus electrode terminal 31 is mounted on the printed board 30. FIG. As shown in FIGS. 7 and 8, the positive electrode terminal 31 includes a fixing portion 310 fixed to the printed circuit board 30 and a pair of

arm portions

311 and 312 connected to the fixing portion 310.

The fixing portion 310 is a plate-like portion bent into an L shape, and includes a horizontal portion 310a and a rising portion 310b that rises from an end of the horizontal portion 310a. In the fixing part 310, the horizontal part 310 a is soldered to the printed circuit board 30. Further, the two column portions 36 provided in the case main body 20 are in contact with the horizontal portion 310 a of the fixing portion 310.

The plate-like arm portion 311 extends at an obtuse angle with the rising portion 310b from one horizontal end portion of the rising portion 310b of the fixing portion 310 in an obliquely outward direction away from the horizontal portion 310a. . An L-shaped leg portion 313 that supports the arm portion 311 is connected to the distal end portion of the arm portion 311. On the inner surface of the arm portion 311, a protruding portion 311 a that comes into contact with the side surface 11 b of the button battery 11 is provided slightly from the front end of the arm portion 311.

Similarly, the plate-like arm portion 312 forms an obtuse angle with the rising portion 310b obliquely outward from the other horizontal end portion of the rising portion 310b of the fixing portion 310 toward the outer side. It extends. An L-shaped leg 314 that supports the arm 312 is connected to the tip of the arm 312. On the inner surface of the arm portion 312, a protruding portion 312 a that comes into contact with the side surface 11 b of the button battery 11 is provided slightly from the front end of the arm portion 312.

As shown in FIG. 8, in the fixing portion 310, the angle θ formed by the horizontal portion 310a and the rising portion 310b is set to be slightly larger than 90 °. Therefore, in the plus electrode terminal 31, when the horizontal portion 310a is soldered to the printed board 30, the

arm portions

311 and 312 and the

leg portions

313 and 314 are slightly inclined toward the minus electrode terminal 32 side. When the plus electrode terminal 31 is placed on the printed circuit board 30, not only the bottom surface of the horizontal portion 310 a but also the corner portions of the L-shaped

leg portions

313 and 314 come into contact with the printed circuit board 30. Therefore, when the plus electrode terminal 31 is automatically mounted on the printed board 30, the

arm portions

311 and 312 can be supported by the

leg portions

313 and 314, respectively. As a result, the positive electrode terminal 31 can be prevented from falling during automatic mounting.

When the button battery 11 is stored in the battery storage portion 27, the side surface 11b of the button battery 11 comes into contact with the protruding

portions

311a and 312a, and the pair of

arm portions

311 and 312 are pushed backward. Then, the bent portion at the boundary between the rising portion 310b and the

arm portions

311 and 312 is elastically deformed, and the angle formed by the rising portion 310b and the

arm portions

311 and 312 increases, and the horizontal portion 310a and the rising portion 310b The bent portion at the boundary is elastically deformed, and the angle θ formed by the horizontal portion 310a and the rising portion 310b is about 90 °. As a result, the pair of

arm portions

311 and 312 press the button battery 11 against the partition wall 35 and sandwich the side surface 11b of the button battery 11 so that the contact between the positive electrode terminal 31 and the button battery 11 is sufficiently obtained. Can be secured.

When the side surface 11b of the button battery 11 comes into contact with the protruding

portions

311a and 312a, the

inclined arm portions

311 and 312 rise so that the

leg portions

313 and 314 are lifted from the printed circuit board 30. Accordingly, the

leg portions

313 and 314 do not damage the printed circuit board 30 when the button battery 11 is stored in the battery storage portion 27.

Next, a method for putting the button battery 11 into the case body 20 will be described in order. 9 to 12 are sectional views sequentially showing how the button battery 11 is put into the case body 20.

First, as shown in FIG. 9, a jig or the like is inserted into the notched portion 40d of the spacer 40, and the spacer 40 is turned up. Next, as shown in FIG. 10, the button battery 11 is inserted into the battery housing portion 27 through the opening 28 toward the lower side of the wall portion 46 while being inclined. Then, as shown in FIG. 11, the front peripheral edge of the button battery 11 is buried under the wall 46, the side surface 11 b of the button battery 11 is pressed against the

arm portions

311, 312 of the positive electrode terminal 31, and rises. When the button battery 11 is put into the battery housing portion 27 while raising the portion 310b, the rear peripheral edge of the button battery 11 exceeds the protrusion 45.

Then, the button battery 11 is completely stored in the battery storage portion 27 while pressing the second main surface 11 c of the button battery 11 against the

support portions

321 and 322 of the negative electrode terminal 32. When the external force applied to the button battery 11 is released, the raised portion 310b is slightly returned to the original position, and the projection 45 is positioned on the button battery 11 as shown in FIG. Since the button battery 11 is biased toward the spacer 40 by the negative electrode terminal 32 that is elastically deformed, the button battery 11 abuts against the protrusion 45 and the wall 46. Thereafter, the protective seal 10 is applied to the seal application region 26 and the spacer 40 so as to cover the opening 28.

As described above, in the present embodiment, since the spacer 40 disposed in the gap between the protective seal 10 attached to the case body 20 and the button battery 11 is provided, the spacer 40 also has a protective seal. 10 can be pasted. Therefore, the contact area between the protective seal 10 and the region where it is attached can be increased. Therefore, the protective seal 10 is difficult to peel off, and the sealing degree of the storage structure of the button battery 11 can be increased. As a result, the button battery 11 can be sufficiently protected from the outside. Furthermore, since the spacer 40 is integrally formed with the case main body 20, an attachment structure between the spacer 40 and the case main body 20 is not necessary, and the storage structure of the button battery 11 can be reduced in size. As a result, the electronic device 1 can be downsized.

Further, in the spacer 40 according to the present embodiment, the main body portion 40b is provided with a facing region 40bb that faces the neck portion 40a. Therefore, the spacer 40 is provided with the protective seal 10 and the button battery 11 by the amount of the facing region 40bb. The area for filling the gap between the two can be enlarged.

As shown in FIG. 13, when the length of the neck portion 40a is short, even if the main body portion 40b does not have a region facing the neck portion 40a, the gap between the case main body 20 and the spacer 40 becomes so large. The protective seal 10 does not easily peel off.

However, if the neck 40a is short as shown in FIG. 13, the neck 40a is difficult to bend, and if the main body 40b is turned up to replace the button battery 11, the spacer 40 may be broken at the neck 40a.

In order to prevent this, as shown in FIG. 14, if the neck 40a is lengthened and the neck 40a is easily bent, the case main body 40b does not have a region facing the neck 40a. The gap between the spacer 20 and the spacer 40 becomes large, and the region where the spacer 40 does not exist between the protective seal 10 and the button battery 11 increases. Therefore, the contact area between the protective seal 10 and the region where it is attached cannot be secured, and the protective seal 10 is easily peeled off.

In the present embodiment, the region where the spacer 40 fills the gap between the protective seal 10 and the button battery 11 can be enlarged by the opposite region 40bb facing the neck portion 40a in the main body portion 40b. Even if the neck portion 40a is lengthened to prevent the neck portion 40a from being damaged when the button battery 11 is stored in the battery storage portion 27 while turning up the portion 40b, the protective seal 10 and the region to which it is attached A contact area can be ensured and it can prevent that the protective seal | sticker 10 becomes easy to peel.

Further, in the present embodiment, a cutout portion 40d is provided on the peripheral edge of the main body portion 40b of the spacer 40 along the direction DR in which the neck portion 40a extends from the case main body 20 and located on an extension line from the neck portion 40a. Therefore, the main body 40b can be easily turned up by inserting a jig or the like into the notch 40d. Therefore, the button battery 11 can be easily stored in the battery storage unit 27.

In the present embodiment, since the inspection hole 40c for exposing the surface of the button battery 11 is formed in the spacer 40, the button battery 11 can be easily inspected using the inspection hole 40c. it can.

In the present embodiment, the inspection hole 40c is formed in a circular shape, but may be formed in another shape. For example, as shown in FIG. 15, the inspection hole 40c may be formed in a “+” shape. Thus, the button cell 11 is formed with the first main surface 11a facing upward by forming the inspection hole 40c in a shape indicating the polarity of the first main surface 11a of the button cell 11 exposed by the inspection hole 40c. Can be easily stored in the case body 20, so that the button battery 11 can be stored in the battery storage portion 27 without the polarity being reversed.

Although the present invention has been described in detail, the above description is illustrative in all aspects, and the present invention is not limited thereto. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.

Claims

A case main body (20) having an opening (28) and a battery storage part (27) for storing a button battery (11) inserted from the opening;
A spacer (40) integrally formed with the case body, disposed in a gap between a seal (10) attached to the case body so as to cover the opening and the button battery in the battery housing; A storage structure for a button battery.
The button battery storage structure according to claim 1,
The spacer is
A flexible neck (40a) extending from the case body into the opening;
A main body (40b) connected to the neck and provided in the opening;
The main body has a button battery storage structure having a region (40bb) facing the neck.
The button battery storage structure according to any one of claims 1 and 2,
The button battery storage structure, wherein the spacer is formed with a hole (40c) for exposing the surface (11a) of the button battery.
The button battery storage structure according to claim 3,
The button battery housing structure, wherein the hole is formed in a shape indicating the polarity of the surface (11a) of the button battery exposed through the hole.
The button battery storage structure according to claim 1,
The spacer is
A flexible neck (40a) extending from the case body into the opening;
A main body (40b) connected to the neck and provided in the opening;
A button battery storage structure in which a notch portion (40d) located on an extension line from the neck portion along a direction (DR) in which the neck portion extends is provided at a peripheral edge of the main body portion.
A button battery (11);
A case body (20) having an opening (28) and a battery storage (27) for storing the button battery inserted from the opening (28);
A seal (10) affixed to the case body so as to cover the opening;
A spacer (40) integrally formed with the case body, which is disposed in a gap between the seal and the button battery in the battery storage unit;
The seal is attached to the spacer and the case main body so as to cover the opening.