electronic equipment

Abstract

Provided is an electronic device with which it is possible to accurately connect an electrode terminal.　An electronic device 1 in which a battery holder 100 that holds a battery 10 can be inserted into and removed from a housing 20, wherein: a positive electrode 10a and a negative electrode 10b of the battery 10 are positioned so as to be lined up; a positive-electrode terminal 42 and a negative-electrode terminal 43 of the electronic device 1 are positioned so as to be lined up; a recessed groove 100g extending in the direction of insertion and removal is formed in the housing 20; a protrusion 122m extending in the direction of insertion and removal is formed on the battery holder 100; and a guide part G is configured from the recessed groove 100g and the protrusion 122m.

Description

[Technical Field]

[0001] The present invention relates to an electronic device powered by a battery. [Background technology]

[0002] Battery-powered electronic devices do not require connection to an external power source and can therefore be used anywhere.

[0003] For example, the sensor device disclosed in Patent Document 1 is an electronic device that senses the status of manufacturing equipment installed on a production line and is powered by a button battery. The sensor device can be powered by inserting a battery holder holding a button battery into a slit-shaped insertion portion of the housing. The battery holder is configured by mounting on a support substrate a first terminal and a second terminal that respectively contact the positive and negative electrodes of the button battery, a processing circuit that processes the output of the sensor element, a communication circuit that communicates with the outside, a connector that can be electrically connected to the sensor element, and other components. Inserting the battery holder holding the button battery into the insertion portion of the housing electrically connects the terminal of the sensor element fixed inside the housing to the connector of the battery holder.

[0004] The battery holder has a length such that one longitudinal end of the support substrate contacts the bottom of the housing, while the other longitudinal end of the support substrate protrudes from the opening of the housing. The opening of the housing is closed by a lid having a locking claw. A slit-shaped recess is formed on the inner surface of the lid, and the other longitudinal end of the support substrate contacts the bottom of the recess in the lid, supporting the battery holder and maintaining electrical connection. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2019-153485 A (pages 8 to 9, Figure 6) Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the sensor device of Patent Document 1, the battery holder is configured so that both ends of the support substrate in the shorter direction are in sliding contact with the inner wall of the insertion portion of the housing, while one end of the support substrate in the longer direction is inserted until it contacts the bottom of the housing. Therefore, if the support substrate is inserted in a state where it is tilted in the thickness direction relative to the insertion portion of the housing, misalignment may occur between the terminals of the sensor element and the connector of the battery holder, resulting in a connection failure.

[0007] The present invention has been made in view of the above-mentioned problems, and has as its object to provide an electronic device in which electrode terminals can be connected accurately. [Means for solving the problem]

[0008] In order to solve the above problems, the electronic device of the present invention comprises: An electronic device in which a battery holder for holding a battery is removably inserted into a housing, The positive and negative terminals on the battery holder side are arranged side by side, The positive and negative terminals of the electronic device are arranged side by side, The housing and the battery holder are formed with either a recessed groove extending in the insertion / removal direction or a protrusion extending in the insertion / removal direction, and the recessed groove and the protrusion form a guide portion. This structure allows the guide section, which is comprised of a recessed groove and a protruding section extending in the direction of insertion and removal of the battery holder, to prevent the battery holder from tilting when inserted into or removed from the housing, thereby enabling accurate connection of the electrode terminals to the electronic device.

[0009] The guide portions may be provided at opposing positions. With this, since the guide portions are provided at two opposing locations, tilting of the battery holder when inserted into the housing can be further reduced.

[0010] the housing is configured with an outer case and an inner case disposed inside the outer case and provided with the guide portion, A circuit board of the electronic device may be fixed to the outer surface of the inner case. This allows the circuit board to be protected by the inner case, and prevents it from being directly affected by external shocks to the outer case or by inserting and removing the battery holder.

[0011] The inner case may be provided with through holes that penetrate in the insertion / removal direction of the battery holder and through which the positive electrode terminal and the negative electrode terminal of the electronic device protrude. With this, the battery holder abuts against the inner case, preventing the positive and negative terminals of the electronic device from pressing the positive and negative terminals of the battery holder with excessive force.

[0012] A positioning mechanism that determines the insertion progress of the battery holder may be provided between the inner case and the battery holder. This allows the positive and negative terminals of the battery holder to come into contact with the positive and negative terminals of the electronic device with an appropriate force.

[0013] The positioning mechanism may be implemented by a recessed and protruding fit between the inner case and the battery holder. This allows the battery holder to be locked by the recessed and protruding parts fitting together when the positive and negative terminals of the battery held in the battery holder are in contact with the positive and negative terminals of the electronic device.

[0014] The battery holder may be provided with a handle. This makes it easy to remove the battery holder from the electronic device by using the handle.

[0015] the housing is configured with an outer case and an inner case disposed inside the outer case and provided with the guide portion, A gap adjusting member may be provided to regulate the gap between the inner case and the outer case. With this, the gap between the inner case and the outer case is adjusted, so that the battery holder and the inner case are less likely to rattle relative to the outer case when assembled.

[0016] Furthermore, if the gap adjusting member is made of, for example, an elastic member and is pressed against the gap between the inner case and the outer case, the rattle suppression effect will be even better. In addition, if the gap adjusting member is provided behind the inner case in the insertion direction, it will be easy to insert and remove the inner case into the outer case. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a perspective view showing a pressure sensor according to a first embodiment of the present invention. [Figure 2] FIG. 1 is an exploded perspective view showing the structure of a pressure sensor according to a first embodiment. [Figure 3] FIG. 1 is a cross-sectional view showing the structure of a pressure sensor according to a first embodiment. [Figure 4] 4 is a perspective view showing the structure of the inner case and battery holder. For ease of explanation, Fig. 4 shows the state where the outer case is removed. [Figure 5] 5 is a perspective view showing the structure of the inner case.For the sake of convenience, Fig. 5 shows the state in which the outer case is removed. [Figure 6] 4 is a cross-sectional view taken along the line AA in FIG. 3. [Figure 7] FIG. 2 is an exploded perspective view showing the structure of the battery holder of the first embodiment. [Figure 8] 8 is a cross-sectional view showing the structure of a pressure holder according to Example 2 of the present invention.In addition, for the sake of convenience of explanation, in Fig. 8, the configuration of a circuit unit and the like are partially omitted. [Figure 9] 9 is a cross-sectional view showing the structure of a pressure holder according to a third embodiment of the present invention.In addition, for the sake of convenience of explanation, in Fig. 9, the configuration of a circuit unit and the like are partially omitted. [Figure 10]10 is a cross-sectional view showing the structure of a pressure holder according to a fourth embodiment of the present invention.In addition, for the sake of convenience of explanation, in Fig. 10, the configuration of a circuit unit and the like are partially omitted. [Figure 11] 1 is a cross-sectional image diagram showing the guide portions of Examples 1 to 4 and the guide portions of modified examples. [Figure 12] 1 is a cross-sectional image diagram showing the positioning mechanisms of Examples 1 to 4 and a positioning mechanism of a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0018] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electronic device according to the present invention will be described below with reference to the accompanying drawings. [Example]

[0019] An electronic device according to a first embodiment will be described with reference to Fig. 1 to Fig. 7. In the following description, the left and right sides of the electronic device as viewed from the front in Fig. 3 will be referred to as the left and right sides of the electronic device. Specifically, the left side of the paper where the sensor unit 30 is provided will be referred to as the left side of the electronic device, and the right side of the paper where the cap member 23 is attached will be referred to as the right side of the electronic device.

[0020] As shown in Fig. 1, the electronic device of the present invention is a pressure sensor 1 configured to be able to detect the pressure of an object to be measured and powered by a battery 10 (see Fig. 2). Pressure sensor 1 is fixed to an installation location such as a pipe, duct, or tank (not shown) and detects the pressure of the object to be measured inside the installation location. The object to be measured is a fluid such as a liquid or gas.

[0021] As shown in Fig. 1, the pressure sensor 1 is mainly composed of a housing 20, a sensor unit 30, a battery holder 100 (see Fig. 2), and a circuit unit 40 (see Fig. 3). The sensor unit 30 is attached to the left end of the housing 20. The battery holder 100 is housed within the housing 20 and holds the battery 10.

[0022] The pressure sensor 1 is fixed for use by, for example, screwing the threaded portion 20a of the housing 20 into a mounting port of a pipe (not shown). The threaded portion 20a is formed on the left end of the outer circumferential surface of the housing 20. This causes a sensor element (not shown) provided in the sensor unit 30 to output a voltage corresponding to the pressure applied by the fluid to be measured in the pipe. The processing chip 31 (see FIG. 3) converts this voltage into a pressure signal.

[0023] As shown in Figures 2 and 3, the housing 20 is made up of a mounting member 21, an outer case 121, and an inner case 122 (see Figures 4 and 5). A threaded portion 20a (see Figure 1) is formed on the left end of the mounting member 21. The outer case 121 is made up of a cover member 22 attached to the right end of the mounting member 21, and a cap member 23 that closes an opening 22a on the right side of the cover member 22. The inner case 122 is fixed to the mounting member 21 and is covered by the cover member 22 and the cap member 23, i.e., the outer case 121.

[0024] As shown in Figure 3, the mounting member 21 has a cylindrical base 21a, a small diameter portion 21b extending leftward from the base 21a, a flange portion 21c protruding outward from the right end of the outer peripheral surface of the base 21a, and a large diameter portion 21d extending rightward from the base 21a.

[0025] The small diameter portion 21b has the aforementioned threaded portion 20a (see FIG. 1) formed on its outer circumferential surface. An annular recess 21e is formed at the right end of the outer circumferential surface of the small diameter portion 21b, and an O-ring 24 is attached to this recess 21e. By screwing the threaded portion 20a formed on the outer circumferential surface of the small diameter portion 21b into a mounting port of a pipe (not shown), the O-ring 24 is clamped between the pipe and the mounting member 21, ensuring a tight seal.

[0026] Further, a recess 21f recessed to the right is formed at the left end of the small diameter portion 21b, and the sensor unit 30 is inserted into this recess 21f from the left and fixed by welding. Although details will be omitted, the through-hole 21m side where the processing chip 31 is placed is sealed to prevent the fluid to be measured from entering.

[0027] A threaded portion 21g (see FIGS. 4 and 5) is formed on the outer peripheral surface of large diameter portion 21d. An annular recessed portion 21h is formed on the left end of the outer peripheral surface of large diameter portion 21d, and an O-ring 25 is attached to this recessed portion 21h. Note that by screwing a threaded portion (not shown) formed on the inner peripheral surface of the left end of cover member 22 into threaded portion 21g formed on the outer peripheral surface of large diameter portion 21d, O-ring 25 is clamped between mounting member 21 and cover member 22, ensuring airtightness.

[0028] A stepped recess 21k recessed to the left is formed at the right end of the large-diameter portion 21d, and this recess 21k accommodates a part of the circuit unit 40. The recess 21f formed in the small-diameter portion 21b and the recess 21k formed in the large-diameter portion 21d are connected by a through-hole 21m that passes through the base 21a in the left-right direction. The sensor unit 30 and the circuit unit 40 are electrically connected by a flexible printed wiring board (not shown) that extends through the through-hole 21m.

[0029] The circuit unit 40 will now be described. As shown in FIG. 3, the circuit unit 40 is mainly composed of a disk-shaped circuit board 41, a positive terminal 42, a negative terminal 43, and a rectangular plate-shaped circuit board 45 (see FIG. 5) on which a processing chip 44 and a wireless chip 46 are mounted. The circuit board 41 is accommodated in a recess 21k of the large-diameter portion 21d of the mounting member 21. The positive terminal 42 and the negative terminal 43 penetrate the circuit board 41 in the thickness direction and are arranged side by side. The circuit board 45 is held on the outer surface of a first plate portion 122d of an inner case 122, which will be described later. The processing chip 44 adjusts the power supplied from the battery 10 and processes signals input from the sensor unit 30. The wireless chip 46 is provided on the circuit board 45 and communicates with the outside. The circuit boards 41 and 45 are electrically connected by a flexible flat cable 47. The positive terminal 42 and the negative terminal 43 do not necessarily have to penetrate the circuit board 41 in the thickness direction.

[0030] As shown in Figures 3 and 4, the positive and negative terminals 42 and 43 are so-called probe pins equipped with a biasing means (not shown) that allows the electrical contacts of the positive and negative terminals 42 and 43 to expand and contract axially and are biased in the extending direction. Specifically, the positive and negative terminals 42 and 43 are inserted into through-holes 122b and 122c formed side by side and penetrating the base 122a of the inner case 122 in the thickness direction. They are supported so that they can contract to the left with their electrical contacts protruding from the through-holes 122b and 122c. As shown in Figure 3, when the battery holder 100 is attached, the positive and negative terminals 42 and 43 are slightly compressed to the left. That is, the positive and negative terminals 42 and 43 are elastically pressed against the positive and negative electrodes 10a and 10b, respectively, of the battery 10 held in the battery holder 100.

[0031] In this way, the circuit unit 40 can supply power to the sensor unit 30 by contacting the positive electrode 10a and negative electrode 10b of the battery 10 held in the battery holder 100 with the positive electrode terminal 42 and negative electrode terminal 43. Furthermore, the circuit unit 40 receives a pressure signal from the sensor unit 30, processes the signal with the processing chip 44, and can communicate with the outside via the wireless chip 46.

[0032] 2 and 3, cover member 22 constituting outer case 121 has a cylindrical shape, and is attached by having its left end portion screwed into threaded portion 21g (see FIGS. 4 and 5) formed on the outer peripheral surface of large-diameter portion 21d of mounting member 21. Furthermore, threaded portion 23c of cap member 23, which also constitutes outer case 121, is screwed into the right end portion of cover member 22, thereby closing opening 22a.

[0033] The cap member 23 includes a disk-shaped base 23a and a small-diameter portion 23b that protrudes leftward from the left side of the base 23a. A threaded portion 23c (see FIG. 2) is formed on the outer peripheral surface of the small-diameter portion 23b. A ring-shaped recess 23d is formed on the right end of the outer peripheral surface of the small-diameter portion 23b, and an O-ring 26 is fitted in this recess 23d. By threading the threaded portion 23c of the cap member 23 into a threaded portion (not shown) formed on the inner peripheral surface of the right end of the cover member 22, the O-ring 26 is clamped between the cover member 22 and the cap member 23, ensuring a tight seal. In this way, the internal space of the outer case 121, which houses the circuit unit 40 and battery holder 100, is partitioned into a substantially sealed state.

[0034] A recess 23e recessed to the right is formed at the left end of the small diameter portion 23b, and a handle 100d formed at the right end of the battery holder 100 is accommodated in this recess 23e.

[0035] 3 to 6, the inner case 122 is made of a resin material and includes a base 122a, and a first plate 122d and a second plate 122e extending from the base 122a in the direction in which the cap member 23 is disposed, i.e., to the right (left in FIG. 4). The base 122a of the inner case 122 is fixed to the mounting member 21 by screws 123 (see FIG. 4).

[0036] As described above, the base 122a has the through holes 122b and 122c formed side by side. Furthermore, as shown in FIG. 3, a plurality of protrusions 122f protruding leftward are formed on the outer diameter side of the left surface of the base 122a. When the inner case 122 is fixed to the mounting member 21, the tips of these protrusions 122f laterally sandwich the outer diameter portion of the circuit board 41 constituting the circuit unit 40 between themselves and a step formed in the recess 21k of the mounting member 21. This allows the circuit board 41 to be stably supported between the inner case 122 and the mounting member 21 (see FIG. 3).

[0037] Furthermore, a boss 122g having a through hole into which a screw 123 is inserted is provided on the right surface (left surface in FIG. 4) of the base 122a.

[0038] 4 and 6, the inner surface of the first plate portion 122d is curved to fit the surface shape of the battery 10 held in the battery holder 100. In addition, a rectangular protrusion 122h is formed on the left end (right end in FIG. 4) of the inner surface of the first plate portion 122d, which can fit into a recess 10c (see FIGS. 2 and 3) formed on the surface of the battery 10. This restricts the insertion and removal direction of the battery holder 100 relative to the inner case 122, preventing reverse connection of the battery 10.

[0039] 5 and 6, the outer surface of the first plate portion 122d has a flat surface at the approximate center in the upper and lower directions, and is provided at the upper and lower ends with a pair of upper and lower hook-shaped protrusions 122k at two locations in the left and right direction, each capable of holding a circuit board 45 that constitutes the circuit unit 40. The circuit board 45 is inserted between the upper and lower protrusions 122k from the right side of the first plate portion 122d. The upper and lower side surfaces of the first plate portion 122d are curved along the inner circumferential surface of the cover member 22 that constitutes the outer case 121.

[0040] 4 and 6, the second plate portion 122e is formed so that its vertical (i.e., short-side) dimension is smaller than that of the first plate portion 122d. Furthermore, a pair of ridges 122m is formed on the inner surface of the upper and lower ends of the second plate portion 122e, extending in the left-right direction (i.e., the longitudinal direction) that is the insertion / removal direction of the battery holder 100. The ridges 122m have a semicircular cross section.

[0041] Furthermore, a pair of upper and lower hemispherical protrusions 122n are formed on the right end (left end in FIG. 4) of the inner surface of the second plate portion 122e.

[0042] In addition, a substantially rectangular cutout 122s is formed in the second plate portion 122e at the approximately vertical center of the right end portion (left end portion in FIG. 4). The formation of the cutout 122s in the second plate portion 122e prevents a tool such as a screwdriver from interfering with the second plate portion 122e. This makes it easier to fasten the screw 123 into the through-hole of the boss 122g formed in the base portion 122a.

[0043] Next, the battery holder 100 will be described. In this first embodiment, a battery holder 100 is described for holding a pack-type lithium battery 10 (hereinafter simply referred to as "battery 10") in which a positive electrode 10a and a negative electrode 10b are arranged side by side at one longitudinal end of the battery holder 100. In this first embodiment, the positive and negative terminals on the battery holder 100 side are the positive and negative electrodes 10a and 10b of the battery 10.

[0044] As shown in Figures 6 and 7, the battery holder 100 is primarily composed of a base 100a, walls 100b and 100c, and a handle 100d. The inner surface of the base 100a is curved to fit the surface shape of the battery 10. The wall 100b is formed in a roughly triangular shape that rises from the left end of the base 100a toward the inner surface. The wall 100c is formed in a rectangular shape that rises from the right end of the base 100a toward the inner surface. The handle 100d extends and bends to the right from the wall 100c.

[0045] 2, the wall portion 100b has a generally triangular shape and abuts against one longitudinal end of the battery 10 when the battery 10 is held in the battery holder 100. This exposes the positive electrode 10a and negative electrode 10b of the battery 10 from cutout-shaped spaces 100k, 100m (see FIG. 7) in the battery holder 100. The wall portion 100b may be freely shaped as long as it allows the positive electrode terminal 42 and negative electrode terminal 43 to be inserted therethrough and exposes the positive electrode 10a and negative electrode 10b of the battery 10 so that they can come into contact with the positive electrode terminal 42 and negative electrode terminal 43, respectively. Instead of a cutout shape, through-holes may be formed in the wall portion.

[0046] The base 100a is provided at its upper and lower ends with a pair of upper and lower claws 100e at three locations in the left and right direction, each capable of holding a battery 10.

[0047] As shown in Fig. 6, the outer surface of the base 100a has a flat surface approximately in the center from top to bottom, and an insertion recess 100f is formed therein. The insertion recess 100f opens to the left side (right side in Fig. 4) where the wall 100b is formed, allowing the second plate 122e of the inner case 122 to be inserted from the right side (left side in Fig. 4). A pair of grooves 100g are formed on the inner walls of the insertion recess 100f. The grooves 100g extend in the left-right direction (i.e., the longitudinal direction) that is the insertion and removal direction of the battery holder 100, and face each other in the up-down direction (i.e., the lateral direction) of the battery holder 100. The grooves 100g have a semicircular cross section and, together with the pair of ridges 122m formed on the inner case 122 described above, form a pair of guides G that guide the movement of the battery holder 100 in the insertion and removal direction.

[0048] Furthermore, a pair of upper and lower recesses 100h with hemispherical cross sections are formed on the bottom surface 100r of the insertion recess 100f at the left end (right end in Figure 4). A pair of protrusions 122n formed on the inner case 122 described above can be fitted into the recesses 100h, forming a positioning mechanism P for the battery holder 100 and locking the battery holder 100 to prevent unintentional left-right movement. Furthermore, with the protrusions 122n of the inner case 122 fitted into the recesses 100h, the wall 100b of the battery holder 100 abuts against the right surface of the base 122a of the inner case 122 (see Figure 3).

[0049] This configuration allows the guide section G, which is formed by the grooves and protrusions extending in the insertion / removal direction of the battery holder 100, i.e., the grooves 100g of the battery holder 100 and the ridges 122m of the inner case 122, to prevent the battery holder 100 from tilting when inserted into or removed from the inner case 122 that constitutes the housing 20. This allows the positive electrode 10a and negative electrode 10b of the battery 10 held in the battery holder 100 to be accurately connected to the positive terminal 42 and negative terminal 43 of the pressure sensor 1.

[0050] Furthermore, the convex strip 122m of the inner case 122 is formed along the longitudinal direction of the second plate 122e, thereby forming a continuous guide G in the insertion / removal direction of the battery holder 100, thereby reliably preventing tilting of the battery holder 100.

[0051] Furthermore, the concave grooves 100g that make up the guide portion G are located at opposing positions, more specifically, at positions that face each other in the short direction of the battery holder 100. As a result, because the guide portions G are located at two opposing positions, tilting of the battery holder 100 when inserted into the inner case 122 can be further reduced.

[0052] The housing 20 is made up of an outer case 121 made up of an attachment member 21, a cover member 22, and a cap member 23, and an inner case 122 placed inside the outer case 121, and a circuit board 45 that constitutes the circuit unit 40 is fixed to the outer surface of a first plate portion 122d of the inner case 122. Therefore, the circuit board 45 is protected by the inner case 122, and is not directly affected by external impacts to the outer case 121 or by the insertion and removal of the battery holder 100.

[0053] The inner case 122 is also provided with through-holes 122b, 122c that penetrate in the insertion / removal direction of the battery holder 100, i.e., the left-right direction, and through which the positive electrode terminal 42 and negative electrode terminal 43 of the pressure sensor 1 protrude. Therefore, the wall 100b of the battery holder 100 abuts against the base 122a of the inner case 122 from the right, preventing the positive electrode terminal 42 and negative electrode terminal 43 of the pressure sensor 1 from pressing with excessive force against the positive electrode terminal 10a and negative electrode 10b of the battery 10 held in the battery holder 100.

[0054] Additionally, a positioning mechanism P is provided between the inner case 122 and the battery holder 100. The positioning mechanism P determines the insertion progress of the battery holder 100 by fitting the recessed portion 100h with the protruding portion 122n. This allows the positive electrode 10a and negative electrode 10b of the battery 10 held in the battery holder 100 to come into contact with the positive electrode terminal 42 and negative electrode terminal 43 of the pressure sensor 1 with an appropriate force.

[0055] Furthermore, because the battery holder 100 can be inserted and removed while the pressure sensor 1 is installed in a pipe or other installation location, battery replacement can be easily performed. Specifically, battery replacement can be easily performed by removing only the cap member 23 and inserting and removing only the battery holder 100 that holds the battery 10, without removing the entire housing 20 from the installation location such as a pipe. This eliminates the need to touch or move the sensor unit 30 or circuit unit 40 when replacing the battery, allowing the pressure sensor 1 to stably sense the measurement target.

[0056] Furthermore, the battery holder 100 is provided with a handle 100d, so that when removing the battery holder 100, the battery holder 100 can be easily pulled out from the pressure sensor 1 by using the handle 100d.

[0057] Furthermore, the outer case 121 that constitutes the housing 20 may be configured with a reverse thread so that the cover member 22 and the mounting member 21 do not rotate together when the cap member 23 is removed, or may be configured so that the fastening force between the cap member 23 and the cover member 22 is minimized. [Example]

[0058] Second Embodiment An electronic device according to a second embodiment will be described with reference to Fig. 8. Note that a description of the same configuration as in the first embodiment will be omitted.

[0059] As shown in Fig. 8, in this second embodiment, a gap adjusting member 227 having a generally rectangular cross section is fixed to the outer surface of the second plate portion 122e that constitutes the inner case 122. The gap adjusting member 227 is made of a resin material. A surface portion 227a of the gap adjusting member 227 can be pressed against the cover member 22 that constitutes the housing 20, specifically against the inner circumferential surface of the outer case 121. In other words, it can be said that the gap adjusting member 227 fills the gap between the inner periphery of the outer case 121 and the inner case 122. The gap adjusting member 227 is disposed to the right of the cutout portion 122s.

[0060] The surface portion 227a of the gap adjusting member 227 may be curved along the inner circumferential surface of the cover member 22. The surface portion 227a of the gap adjusting member 227 does not have to be pressed against the inner circumferential surface of the cover member 22 as long as it is in contact with the inner circumferential surface of the cover member 22. The gap adjusting member 227 may be integrally molded with the inner case 122.

[0061] With this, when the battery holder 100 is attached to the inner case 122, the gap adjustment member 227 is disposed in the gap formed between the outer surface of the second plate portion 122e constituting the inner case 122 and the inner peripheral surface of the cover member 22, and the surface portion 227a is pressed against the inner peripheral surface of the cover member 22. This prevents the battery holder 100 from rattling when attached to the inner case 122. This stabilizes the contact between the positive and negative terminals 42 and 43 of the pressure sensor 1 and the positive and negative electrodes 10a and 10b of the battery 10 held in the battery holder 100.

[0062] Furthermore, because the front of the battery holder 100 in the insertion direction receives force from the positive electrodes 10a and negative electrodes 10b of the batteries 10, and the rear side of the battery holder 100 in the insertion direction receives force from the gap adjustment member 227, the battery holder 100 is less likely to rattle when attached to the housing 20. Furthermore, because the gap adjustment member 227 is located at the rear of the insertion direction, the battery holder 100 and inner case 122 can be easily inserted into the outer case 121. [Example]

[0063] Third Embodiment An electronic device according to a third embodiment will be described with reference to Fig. 9. Note that a description of the same configuration as in the first embodiment will be omitted.

[0064] As shown in Fig. 9, in this third embodiment, a gap adjustment member 327 having a right-angled triangular cross section is fixed to the outer surface of the second plate portion 122e that constitutes the inner case 122. The gap adjustment member 327 is made of a resin material. The gap adjustment member 327 has a corner portion 327a that can be pressed against the inner circumferential surface of the cover member 22 that constitutes the housing 20. In other words, the gap adjustment member 327 is in contact with the inner periphery of the outer case 121 due to its deflection. The gap adjustment member 327 is also located to the right of the cutout portion 122s.

[0065] Furthermore, the corner 327a is formed at the right end of the gap adjustment member 327. The corner 327a of the gap adjustment member 327 may be curved along the inner circumferential surface of the cover member 22. The corner 327a of the gap adjustment member 327 does not have to be pressed against the inner circumferential surface of the cover member 22 as long as it is in contact with the inner circumferential surface of the cover member 22. The gap adjustment member 327 may also be integrally molded with the inner case 122.

[0066] With this, when the battery holder 100 is attached to the inner case 122, the gap adjustment member 327 is disposed in the gap formed between the outer surface of the second plate portion 122e constituting the inner case 122 and the inner peripheral surface of the cover member 22, and the corner portion 327a is pressed against the inner peripheral surface of the cover member 22. This prevents the battery holder 100 from rattling when attached to the inner case 122. This stabilizes the contact between the positive and negative terminals 42 and 43 of the pressure sensor 1 and the positive and negative electrodes 10a and 10b of the battery 10 held in the battery holder 100.

[0067] Furthermore, the front of the battery holder 100 in the insertion direction receives force from the positive electrode 10a and negative electrode 10b of the battery 10, and the rear side of the battery holder 100 in the insertion direction receives force from the gap adjustment member 327, so that the battery holder 100 is less likely to rattle when attached to the housing 20.

[0068] Furthermore, since only the corner 327a of the gap adjustment member 327 is pressed against the inner surface of the cover member 22, the resistance caused by sliding between the corner 327a of the gap adjustment member 327 and the inner surface of the cover member 22 is reduced, allowing the battery holder 100 to be inserted and removed smoothly into the inner case 122.

[0069] Furthermore, because the corner 327a is formed at the right end of the gap adjustment member 327, the corner 327a of the gap adjustment member 327 slides against the inner circumferential surface of the cover member 22 in a narrow range near the opening 22a on the right side of the cover member 22. This makes it less likely that the gap adjustment member 327 will interfere with the insertion and removal of the battery holder 100 into the inner case 122. [Example]

[0070] An electronic device according to a fourth embodiment will be described with reference to Fig. 10. Note that a description of the same configuration as in the first embodiment will be omitted.

[0071] 10, in the fourth embodiment, a gap adjustment member 427 made of a thin flat spring is fixed to the outer surface of the second plate portion 122e that constitutes the inner case 122. A bent portion 427a of the gap adjustment member 427 can be pressed against the inner circumferential surface of the cover member 22 that constitutes the housing 20. The gap adjustment member 427 is also disposed to the right of the notch portion 122s. The bent portion 427a of the gap adjustment member 427 does not have to be pressed against the inner circumferential surface of the cover member 22 as long as it is in contact with the inner circumferential surface of the cover member 22.

[0072] With this, when the battery holder 100 is attached to the inner case 122, the gap adjusting member 427 is disposed in the gap formed between the outer surface of the second plate portion 122e constituting the inner case 122 and the inner peripheral surface of the cover member 22, and the bent portion 427a of the gap adjusting member 427 is pressed against the inner peripheral surface of the cover member 22. This prevents the battery holder 100 from rattling when attached to the inner case 122. This stabilizes the contact between the positive and negative terminals 42 and 43 of the pressure sensor 1 and the positive and negative electrodes 10a and 10b of the battery 10 held in the battery holder 100.

[0073] Furthermore, the battery holder 100 receives force from the positive electrode 10a and negative electrode 10b of the battery 10 at the front in the insertion direction, and receives force from the gap adjustment member 427 at the rear side in the insertion direction, so the battery holder 100 is less likely to rattle when attached to the housing 20.

[0074] Furthermore, since only the bent portion 427a of the gap adjustment member 427 is pressed against the inner surface of the cover member 22, the resistance due to sliding between the bent portion 427a of the gap adjustment member 427 and the inner surface of the cover member 22 is reduced, allowing the battery holder 100 to be inserted and removed smoothly into the inner case 122.

[0075] Furthermore, the gap adjustment member 427 may be fixed to the inner surface of the inner case 122. In this case, it is preferable that both ends of the thin flat spring are fixed to the inner surface of the inner case 122 and that the bent portion 427a protrudes toward the inner surface of the inner case 122.

[0076] Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these embodiments, and the present invention also includes modifications and additions that do not deviate from the gist of the present invention.

[0077] For example, the electronic device of the present invention is not limited to a pressure sensor, but may be applied to other sensors or electronic devices other than sensors as long as they are powered by a battery.

[0078] Furthermore, the electronic device may be configured so that batteries other than the aforementioned pack-type lithium battery, such as button batteries, AA batteries, AAA batteries, square batteries, and coin batteries, can be held by the battery holder.

[0079] In addition, in Examples 1 to 4, the positive and negative terminals of the battery holder are directly connected to the positive and negative terminals of the pressure sensor, but this is not limiting. Alternatively, electrode terminals that are electrically connected to the battery and can contact the positive and negative terminals of the pressure sensor may be provided on a wall portion erected at one longitudinal end of the battery holder. Furthermore, the positive and negative terminals of the battery holder may be arranged vertically, and need not be in the same position on the left and right.

[0080] Furthermore, the ridges and grooves that make up the guide section are not limited to the semicircular shape shown in the cross-sectional image of Figure 11(a) as described above, but may have any shape that allows the ridges to be inserted into and removed from the grooves from one longitudinal end and that can guide the sliding of the battery holder. Specifically, the ridges and grooves may be formed into other shapes, such as a quadrilateral such as a rectangle (see Figure 11(b)), a flared trapezoid (see Figure 11(d)), a tapered trapezoid (see Figure 11(e)), or other quadrilateral shapes such as a triangle (see Figure 11(c)).

[0081] Furthermore, the convex rib portion and the concave groove that constitute the guide portion are not limited to being formed in approximately the same shape, and for example, the concave groove may be formed in a rectangular shape, and the convex rib portion may be formed in a shape different from the concave groove, for example, a shape as shown in Figure 11.

[0082] Furthermore, the shapes of the pair of ridges and grooves that make up the guide portion are not limited to being formed in the same shape, but may be different shapes.

[0083] The convex and concave grooves that make up the guide section may also be formed with the convex and concave relationship reversed, i.e., the concave grooves may be formed on the inner case and the convex portions may be formed on the battery holder.

[0084] Furthermore, the guide portions are not limited to being provided at two locations facing each other in the short-side direction, but may be provided at one location or at three or more locations.

[0085] Furthermore, the guide portion is not limited to a convex ridge portion that is continuous in the insertion / removal direction, but may be configured with a plurality of convex portions that are aligned in the insertion / removal direction.

[0086] Furthermore, the convex and concave portions that make up the positioning mechanism are not limited to the hemispherical shapes shown in the cross-sectional image of Figure 12(a) as described above, and may have any shape that allows for convex and concave engagement. Specifically, the convex and concave portions may be formed in other shapes, such as a triangle (see Figure 12(b)) or a tapered trapezoid (see Figure 12(c)). It is preferable that the convex portions that make up the positioning mechanism have a curved or inclined surface that can easily fit into the concave portions when the battery holder is inserted.

[0087] Furthermore, the convex portion and concave portion that constitute the positioning mechanism are not limited to being formed in approximately the same shape, and may be formed, for example, in a rectangular shape with the convex portion having a different shape from the concave portion, such as the shape shown in Figure 12.

[0088] Furthermore, the shapes of the pair of convex and concave portions that constitute the positioning mechanism are not limited to being formed in the same shape, and may be different shapes.

[0089] Furthermore, the convex and concave portions that make up the positioning mechanism may be formed in the reversed convex-concave relationship, i.e., the concave portions may be formed on the inner case and the convex portions may be formed on the battery holder.

[0090] Furthermore, the number of positioning mechanisms is not limited to two, but may be one or three or more.

[0091] Furthermore, the control chip and wireless chip that constitute the circuit unit may be provided at any position on the circuit board.

[0092] Furthermore, in the above-described Examples 2 to 4, a configuration was described in which a gap adjustment member is provided on the inner case that constitutes the valve housing, but this is not limited thereto. The gap adjustment member may be provided on the inner surface of the cover member (outer case) that constitutes the valve housing, or may be provided on both the inner case and the cover member. [Explanation of symbols]

[0093] 1. Pressure sensor (electronic device) 10-pack lithium battery (battery) 10a Positive electrode (positive terminal on the battery holder side) 10b Negative electrode (negative terminal on the battery holder side) 20. Housing 21 Mounting material 22 Cover member 23 Cap member 30 Sensor Unit 40 Circuit Unit 41 Circuit Board 42 Positive terminal (positive terminal of electronic device) 43 Negative terminal (negative terminal of electronic device) 44 Processing Chips 45 Circuit Board 46 Wireless Chip 100 Battery Holder 100b,100c wall part 100d Handle 100e Claw part 100g groove (guide groove) 100h recess 100k,100m notched space 121 Outer case 122 Inner case 122b,122c through hole 122d 1st plate part 122e 2nd plate part 122m Convex strip (convex part of guide part) 122n convex part 227 Gap adjustment member 327 Gap adjustment member 427 Gap adjustment member G guide part P Positioning mechanism

Claims

1. An electronic device in which a battery holder for holding a battery is removably inserted into a housing, The positive and negative terminals on the battery holder side are arranged side by side, The positive and negative terminals of the electronic device are arranged side by side, The housing and the battery holder are formed with either a recessed groove extending in the insertion / removal direction or a protrusion extending in the insertion / removal direction, and the recessed groove and the protrusion form a guide portion; The electronic device further includes a positioning mechanism between the inner case and the battery holder that determines the insertion progress of the battery holder.

2. The electronic device according to claim 1 , wherein the guide portions are provided at opposing positions.

3. the housing is configured with an outer case and an inner case disposed inside the outer case and provided with the guide portion, 3. The electronic device according to claim 1, wherein a circuit board of the electronic device is fixed to an outer surface of the inner case.

4. The electronic device according to claim 3 , wherein the inner case is provided with through holes that penetrate in the direction of insertion and removal of the battery holder and through which the positive terminal and the negative terminal of the electronic device protrude.

5. 5. The electronic device according to claim 1, wherein the positioning mechanism is achieved by a recessed and protruding fit between the inner case and the battery holder.

6. 6. The electronic device according to claim 1, wherein the battery holder is provided with a handle.

7. the housing is configured with an outer case and an inner case disposed inside the outer case and provided with the guide portion, 7. The electronic device according to claim 1, further comprising a gap adjusting member for adjusting a gap between the inner case and the outer case.

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