electronic machinery

Abstract

To provide an electronic apparatus capable of achieving stability and sealing performance of an electric contact of both terminals.SOLUTION: An electronic apparatus comprises: an electric power supply unit 101 constructed by an electric power supply adjustment board 10 and a holder 100 holding the electric power supply adjustment board 10; a housing member 20 housing the electric power supply unit 101 inserted from an opening 20a; and a cap member 23 blocking the opening 20a. In the housing member 20, a positive electrode terminal 42 and a negative electrode terminal 43 are parallely arranged. In the electric power supply unit 101, a positive electrode terminal 14 and a negative electrode terminal 15 are parallely arranged in one end side. An engagement mechanism P engaging the electric power supply unit 101 to the housing member 20 is provided in a state where the positive electrode terminal 14 and the negative electrode terminal 15 of the electric power supply unit 101 are electrically contacted to the positive electrode terminal 42 and the negative electrode terminal 43 of the housing member 20. Electric power supply lines 27 and 29 which can connect an external electric power supply to the electric power supply adjustment board 10 penetrate the cap member 23 in a sealed state.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an electronic device that can use an external power source. [Background technology]

[0002] An electronic device powered by an external power source receives power from the external power source by connecting a power plug or the like to the external power source. Meanwhile, an electronic device powered by a battery receives power from a battery housed inside the electronic device. Conventionally, electronic devices that can selectively use either an external power source or a battery as a power source depending on the installation location, usage environment, etc., are known.

[0003] For example, the electronic device disclosed in Patent Document 1 includes a power supply housing capable of housing a battery or a power adapter, and a pivotable lid is provided near the opening of the power supply housing. The power adapter has the same external dimensions and shape as a rectangular parallelepiped nickel-cadmium battery that can be used with the electronic device described in Patent Document 1, and is provided with a positive terminal on one end and a negative terminal on the other end. The back surface of the lid is provided with a positive terminal that contacts the positive terminal of the battery or the positive terminal of the power adapter. The bottom surface of the power supply housing is provided with a negative terminal that contacts the negative terminal of the battery or the negative terminal of the power adapter. That is, by housing the battery or the power adapter in the power supply housing and closing the lid, the lid presses against the battery or the power adapter, and the positive and negative terminals of the battery or the positive and negative terminals of the power adapter are pressed against the positive terminal on the back surface of the lid and the negative terminal on the bottom surface of the power supply housing, respectively.

[0004] The power adapter also has a jack on its side for external power supply. The power supply housing has a hole on its side that connects to the outside. This hole aligns with the jack on the side of the power adapter housed in the power supply housing. By inserting a plug through the hole on the side of the power supply housing, the plug connects to the jack on the side of the power adapter inside the power supply housing, allowing power to be supplied from an external power source to the power adapter. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Microfilm of Utility Model Application No. 62-91664 (Unexamined Utility Model Application No. 63-200297) (pages 4 to 6, Figure 1) Summary of the Invention [Problem to be solved by the invention]

[0006] In the electronic device of Patent Document 1, by closing a pivoting lid and pressing on the battery or power adapter, movement of the battery or power adapter within the power supply compartment is restricted and electrical contact between the positive terminal on the back of the lid and the negative terminal on the bottom of the power supply compartment is ensured. However, this lid does not adequately seal the battery compartment. In addition, the side of the power supply compartment has a hole for connecting an external power source to the jack of the power adapter housed in the power supply compartment, which could allow liquid, vapor, etc. to enter the power supply compartment through the hole.

[0007] The present invention has been made in view of these problems, and has as its object to provide an electronic device that achieves both stable electrical contact between terminals and good sealing properties. [Means for solving the problem]

[0008] In order to solve the above problems, the electronic device of the present invention comprises: a power supply unit including a power supply adjustment board and a holder for holding the power supply adjustment board; a housing member for housing the power supply unit inserted through an opening; and a cap member for closing the opening; In the housing member, a positive electrode terminal and a negative electrode terminal are arranged side by side, The power supply unit has a positive terminal and a negative terminal arranged side by side at one end thereof, a locking mechanism is provided that locks the power supply unit in the housing member in a state in which the positive electrode terminal and the negative electrode terminal of the power supply unit are in electrical contact with the positive electrode terminal and the negative electrode terminal of the housing member, A power supply line capable of connecting an external power source to the power supply adjustment board passes through the cap member in a sealed state. According to this, by locking the power supply unit to the housing member using the locking mechanism, it is possible to ensure that the positive and negative terminals of the power supply unit are in electrical contact with the positive and negative terminals of the housing member. Furthermore, by closing the opening of the housing member with a cap member, the interior of the housing member housing the power supply unit is made into a sealed space, and an external power source can be connected to the power supply adjustment board housed in the housing member via a power supply line that passes through the cap member in a sealed state. This makes it possible to provide an electronic device that achieves both stable electrical contact between terminals and a sealed structure.

[0009] The power supply adjustment board may be detachably held by the holder in a state where it is fixed to a mounting member on which the positive terminal and the negative terminal of the power supply unit are provided. This allows the power supply adjustment board to be protected by the mounting member.

[0010] The attachment member may be attached to the holder in a direction perpendicular to a direction in which the holder is inserted into the accommodating member. This reliably maintains the positive and negative terminals of the power supply unit in electrical contact with the positive and negative terminals of the housing member.

[0011] At least a portion of the power supply line may be flexible. This makes it possible to prevent the power supply line from bending when attaching or detaching the cap member, which can cause poor contact with the power supply adjustment board, and also makes it easier to attach or detach the cap member.

[0012] The holder may include a grip portion. With this, by removing the cap member and gripping the grip portion of the holder, it is easy to remove the power supply unit from the state in which the power supply unit is locked in the housing member.

[0013] The electronic device of the present invention comprises: a power supply unit including a holder and a power supply section held by the holder; a housing member that houses the power supply unit inserted through an opening; and a cap member that closes the opening; In the housing member, a positive electrode terminal and a negative electrode terminal are arranged side by side, The power supply unit has a positive terminal and a negative terminal arranged side by side at one end thereof, a locking mechanism is provided that locks the power supply unit in the housing member in a state in which the positive electrode terminal and the negative electrode terminal of the power supply unit are in electrical contact with the positive electrode terminal and the negative electrode terminal of the housing member, The power supply unit has a power supply adjustment board to which a battery or an external power supply is connected. According to this, by locking the power supply unit to the housing member using the locking mechanism, it is possible to ensure that the positive and negative terminals of the power supply unit are in electrical contact with the positive and negative terminals of the housing member. Furthermore, by closing the opening of the housing member with a cap member, the interior of the housing member in which the power supply unit is housed can be made into a sealed space. This makes it possible to provide an electronic device that achieves both stable electrical contact between the terminals and a sealed design. Furthermore, it is possible to selectively use a battery or an external power source as the power source depending on the installation location, usage environment, etc.

[0014] The power supply unit may be composed of the battery and a spacer that corresponds to the shape of the battery. This allows the holder to hold batteries and spacers of different shapes by using spacers that correspond to the shape of the batteries used in the power supply unit, and allows the positive and negative terminals of the power supply units arranged side by side to come into contact with the positive and negative terminals of the accommodating member. [Brief explanation of the drawings]

[0015] [Figure 1] 1(a) and 1(b) are perspective views showing a pressure sensor according to a first embodiment of the present invention. [Figure 2] FIG. 1 is a cross-sectional view showing the structure of a pressure sensor according to a first embodiment. [Figure 3] 3 is a perspective view showing the structure of the inner case and the holder. For convenience of explanation, Fig. 3 shows the state where the outer case is removed. [Figure 4] 4 is a perspective view showing the structure of the inner case. For convenience of explanation, Fig. 4 shows the state where the outer case is removed. [Figure 5] 3 is a cross-sectional view taken along the line AA in FIG. 2. [Figure 6] FIG. 2(a) is an exploded perspective view showing the structure of a power supply unit according to a first embodiment, and FIG. 2(b) is a perspective view of the same. [Figure 7] FIG. 2 is a perspective view showing the structure of the mounting member of the first embodiment. [Figure 8] 10(a) and 10(b) are perspective views showing a pressure sensor according to a second embodiment of the present invention. [Figure 9] FIG. 10 is a cross-sectional view showing the structure of a pressure sensor according to a second embodiment. [Figure 10] FIG. 10 is a perspective view showing a pressure sensor according to a third embodiment of the present invention. [Figure 11] FIG. 10 is a cross-sectional view showing the structure of a pressure sensor according to a third embodiment. [Figure 12] FIG. 10(a) is an exploded perspective view showing the structure of a power supply unit according to a third embodiment, and FIG. DETAILED DESCRIPTION OF THE INVENTION

[0016] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electronic device according to the present invention will be described [Example]

[0017] 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 as viewed from the front in Fig. 2 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.

[0018] 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 a measurement object and powered by an external power source (not shown). Pressure sensor 1 is fixed to an installation location such as a pipe, duct, or tank (not shown) and detects the pressure of the measurement object inside the installation location. The measurement object is a fluid such as a liquid or gas.

[0019] As shown in FIG. 1, the pressure sensor 1 is mainly composed of a housing 20 as a containing member, a sensor unit 30, a holder 100 (see FIG. 2), and a circuit unit 40 (see FIG. 2). The sensor unit 30 is attached to the left end of the housing 20. The holder 100 is housed inside the housing 20 through an opening formed at the right end of the housing 20 (more specifically, an opening 22a of a cover member 22, which will be described later). The opening of the housing 20 is closed by a cap member 23. The holder 100 also holds a mounting member 13 to which a power supply adjustment board 10, which serves as a power supply unit, is fixed. That is, in this first embodiment, the power supply unit is composed of the power supply adjustment board 10 and the mounting member 13. The power supply adjustment board 10 also has a converter circuit that adjusts the voltage supplied from an external power source.

[0020] 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. 2) converts this voltage into a pressure signal.

[0021] As shown in FIG. 2, the housing 20 is made up of an outer case 121 and an inner case 122 (see FIGS. 3 and 4). The outer case 121 is made up of a connecting member 21, a cover member 22, and a cap member 23. A threaded portion 20a (see FIG. 1) is formed at the left end of the connecting member 21. The cover member 22 is attached to the right end of the connecting member 21. An opening 22a on the right side of the cover member 22 is closed by the cap member 23. The inner case 122 is fixed to the connecting member 21 and is covered by the cover member 22 and the cap member 23.

[0022] As shown in FIG. 2, the connecting member 21 includes a cylindrical base portion 21a, a small diameter portion 21b extending leftward from the base portion 21a, a flange portion 21c protruding radially outward from the right end of the outer peripheral surface of the base portion 21a, and a large diameter portion 21d extending rightward from the base portion 21a.

[0023] 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 threading 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 connecting member 21, ensuring a tight seal.

[0024] Furthermore, a recess 21f recessed to the right is formed at the left end of small diameter portion 21b, and 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 processing chip 31 is placed is sealed to prevent the fluid to be measured from entering.

[0025] A threaded portion 21g (see FIGS. 3 and 4) is formed on the outer peripheral surface of large diameter portion 21d. An annular recess 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 recess 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 connecting member 21 and cover member 22, ensuring airtightness.

[0026] 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.

[0027] The circuit unit 40 will now be described. As shown in FIG. 2, 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. 4) 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 connecting 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 power supplied from a power supply adjustment board 10 connected to an external power source 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 board 41 and the circuit board 45 are electrically connected by a flexible flat cable 47. The positive electrode terminal 42 and the negative electrode terminal 43 do not have to penetrate the circuit board 41 in the thickness direction. In the first embodiment, the positive electrode terminal and the negative electrode terminal of the housing 20, which is the accommodating member, are the positive electrode terminal 42 and the negative electrode terminal 43 of the circuit unit 40.

[0028] As shown in FIGS. 2 and 3 , the positive electrode terminal 42 and the negative electrode terminal 43 are so-called probe pins, equipped with a biasing means (not shown) that allows the electrical contacts of the positive electrode terminal 42 and the negative electrode terminal 43 to expand and contract in the axial direction and are biased in the extending direction. Specifically, the positive electrode terminal 42 and the negative electrode terminal 43 are inserted into through-holes 122b and 122c formed side by side and penetrating the base portion 122a of the inner case 122 in the thickness direction. The positive electrode terminal 42 and the negative electrode terminal 43 are supported so as to be retractable to the left with their electrical contacts protruding from the through-holes 122b and 122c, respectively. As shown in FIG. 2 , when the holder 100 is attached, the positive electrode terminal 42 and the negative electrode terminal 43 are slightly retracted to the left. That is, the positive electrode terminal 42 and the negative electrode terminal 43 are in resiliently and electrically contact with the positive electrode terminal 14 and the negative electrode terminal 15, respectively, provided on the mounting member 13 held by the holder 100.

[0029] In this way, the positive terminal 42 and the negative terminal 43 of the circuit unit 40 come into contact with the positive terminal 14 and the negative terminal 15 of the mounting member 13 held by the holder 100, thereby enabling the circuit unit 40 to supply power from an external power source to the sensor unit 30. Furthermore, the circuit unit 40 receives a pressure signal from the sensor unit 30, processes the signal using the processing chip 44, and is able to communicate with the outside world using the wireless chip 46.

[0030] 2, cover member 22 constituting outer case 121 is cylindrical, and is attached in a substantially sealed manner by having its left end portion threadedly engaged with thread portion 21g (see FIGS. 3 and 4) formed on the outer peripheral surface of large-diameter portion 21d of connecting member 21. Furthermore, thread portion 23d of cap member 23, which also constitutes outer case 121, is threadedly engaged with the right end portion of cover member 22, thereby closing opening 22a in a substantially sealed manner.

[0031] Specifically, the cap member 23 includes a disk-shaped base 23a, a large-diameter portion 23b protruding leftward from the left side surface of the base 23a, and a small-diameter portion 23c protruding leftward from the inner diameter side of the left end surface of the large-diameter portion 23b. A threaded portion 23d is formed on the outer peripheral surface of the small-diameter portion 23c. A ring-shaped recess 23e is formed on the right end portion of the outer peripheral surface of the small-diameter portion 23c, and an O-ring 26 is fitted in this recess 23e. By threading the threaded portion 23d of the cap member 23 into a threaded portion (not shown) formed on the inner peripheral surface of the right end portion 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.

[0032] Furthermore, a through-hole 23g penetrating in the left-right direction is formed in the base 23a, and a waterproof connector 27 (see FIG. 1) serving as a power supply line is inserted into this through-hole 23g from the left side. The connector 27 is rotatable relative to the cap member 23. Furthermore, with the connector 27 inserted into the through-hole 23g, a waterproof nut 28 is screwed from the right side onto a threaded portion (not shown) formed on the outer peripheral surface of the connector 27, thereby fixing the connector 27 to the cap member 23 in a substantially sealed state. In this way, the internal space of the housing 20 in which the holder 100 is accommodated is partitioned in a substantially sealed state.

[0033] The connector 27 is electrically connected to a pair of upper and lower terminals 10a, 10b provided at approximately the center of the left and right sides of the power supply adjustment board 10 by electric wires 29 serving as power supply lines. The terminal 10a of the power supply adjustment board 10 is electrically connected to the positive terminal 14 of the mounting member 13 via a converter circuit (not shown). The terminal 10b of the power supply adjustment board 10 is electrically connected to the negative terminal 15 of the mounting member 13 (see FIGS. 5 and 7). That is, the pressure sensor 1 can supply power from an external power source to the sensor unit 30 by connecting a male connector (not shown) connected to the external power source to the connector 27.

[0034] In addition, a recess 23f recessed to the right is formed at the left end of the cap member 23, and this recess 23f is designed to accommodate the grip portion 100d formed at the right end of the holder 100 and the left end of the connector 27.

[0035] 2 to 5, 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. 3). The base 122a of the inner case 122 is fixed to the connecting member 21 by screws 123 (see FIG. 3).

[0036] As described above, the base 122a has the through holes 122b and 122c formed side by side. Furthermore, as shown in FIG. 2, 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 connecting 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 connecting member 21. This allows the circuit board 41 to be stably supported between the inner case 122 and the connecting member 21 (see FIG. 2).

[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. 3) of the base 122a.

[0038] 3 and 5, the inner surface of the first plate portion 122d is curved. A rectangular protrusion 122h is formed on the left end (the right end in FIG. 3) of the inner surface of the first plate portion 122d.

[0039] 4 and 5, 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] 3 and 5, the second plate portion 122e is formed so that its dimension in the vertical direction, i.e., the short side direction, is smaller than that of the first plate portion 122d. Also, a pair of ridges 122m are 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, which is the insertion / removal direction of the 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. 3) 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. 3). The cutout 122s formed 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 holder 100 will be described. In this embodiment 1, a mode will be described in which the mounting member 13, to which the power supply adjustment board 10 is fixed, is held in a state in which the positive terminal 14 and the negative terminal 15 of the mounting member 13 are arranged side by side at one longitudinal end of the holder 100. In this embodiment 1, the holder 100 forms a power supply unit 101 by holding the mounting member 13 to which the power supply adjustment board 10 is fixed. In this embodiment 1, the positive terminal and the negative terminal of the power supply unit 101 are the positive terminal 14 and the negative terminal 15 of the mounting member 13.

[0044] As shown in Figures 2, 5, and 6(a), the holder 100 is mainly composed of a base 100a, walls 100b and 100c, and a grip 100d. The inner surface of the base 100a is curved. The wall 100b is formed in a generally triangular shape rising from the left end of the base 100a toward the inner surface. The wall 100c is formed in a rectangular shape rising from the right end of the base 100a toward the inner surface. The grip 100d extends from the wall 100c, bending to the right.

[0045] 6(a) and 6(b), the wall portion 100b has a substantially triangular shape, and when the mounting member 13 is held by the holder 100, the wall portion 100b abuts against one longitudinal end of the mounting member 13, i.e., against a wall portion 13b of the mounting member 13, which will be described later. This exposes the positive electrode terminal 14 and the negative electrode terminal 15 of the mounting member 13 from the cutout-shaped spaces 100k, 100m of the holder 100. Note that the wall portion 100b may be freely shaped as long as it allows the positive electrode terminal 42 and the negative electrode terminal 43 to be inserted therethrough, respectively, and exposes the positive electrode terminal 14 and the negative electrode terminal 15 of the mounting member 13 so as to be able to come into contact with the positive electrode terminal 42 and the negative electrode terminal 43, respectively. In place of the cutout shape, through holes may be formed in the wall portion.

[0046] The base 100a has upper and lower pairs of claws 100e at three positions in the left and right direction on the upper and lower ends thereof. In the first embodiment, the mounting member 13 is held by the upper and lower pairs of claws 100e provided on both the left and right ends.

[0047] As shown in Fig. 5, the outer surface of the base 100a has a flat surface at the approximate center in the vertical direction, and an insertion recess 100f is formed therein. The insertion recess 100f opens to the left side (the right side in Fig. 3) where the wall 100b is formed, allowing the second plate 122e of the inner case 122 to be inserted from the right side (the left side in Fig. 3). A pair of grooves 100g are formed on the inner walls of the insertion recess 100f on the inner surface, extending in the left-right direction, i.e., the longitudinal direction, which is the insertion / removal direction of the holder 100, and facing each other in the up-down direction, i.e., the lateral direction. The grooves 100g have a semicircular cross section, and together with the pair of ridges 122m formed on the inner case 122 described above, constitute a pair of guides G that guide the movement of the holder 100 in the insertion / removal direction.

[0048] Furthermore, a pair of upper and lower through-holes 100h are formed in the left end portion (right end portion in FIG. 3) of the bottom surface of the insertion recess 100f. A pair of protrusions 122n formed on the inner case 122 described above can be fitted into the through-holes 100h, thereby forming a locking mechanism P that locks the holder 100 to prevent unintentional left-right movement and also enabling the holder 100 to be positioned. More specifically, with the protrusions 122n of the inner case 122 fitted into the through-holes 100h, the wall 100b of the holder 100 abuts against the right surface of the base 122a of the inner case 122 (see FIG. 2).

[0049] 2 and 6(b), when the mounting member 13 is held by the holder 100, the positive terminal 14 and the negative terminal 15 are arranged side by side on the left end, i.e., on the wall portion 13b, of the mounting member 13. The distance in the left-right direction between the walls 100b and 100c of the holder 100 is configured to be equal to or slightly shorter than the sum of the left-right dimensions of the mounting member 13.

[0050] 2, 6, and 7, mounting member 13 is made of a resin material and is mainly composed of base 13a and wall portions 13b and 13c. As shown in particular in Fig. 7, a pair of upper and lower substantially rectangular mounting portions 13d and 13e are formed on the right end (left end in Fig. 6) of base 13a in mounting member 13. Long portions 14a and 15a of positive terminal 14 and negative terminal 15 are respectively disposed in mounting portions 13d and 13e from the inner surface side of base 13a by insert molding.

[0051] In this first embodiment, the positive electrode terminal 14 and the negative electrode terminal 15 are formed by bending a metal piece into a generally L-shape. Furthermore, a pair of upper and lower hook-shaped protrusions 13g are formed at two locations in the left-right direction on the upper and lower ends of the mounting portions 13d and 13e. The protrusions 13g abut against the long portions 14a and 15a of the positive electrode terminal 14 and the negative electrode terminal 15, thereby regulating the insertion progress of the long portions 14a and 15a of the positive electrode terminal 14 and the negative electrode terminal 15 into the mounting portions 13d and 13e.

[0052] The back surface of the power supply adjustment board 10, which is located at the back of the paper in Fig. 2, is electrically connected to the long portions 14a, 15a of the positive and negative terminals 14, 15. In this way, the positive and negative terminals 14, 15, and the terminal portions 10a, 10b of the power supply adjustment board 10 are electrically connected via the converter circuit.

[0053] In addition, in the mounting member 13, the wall portion 13b is formed in a generally elliptical shape rising from the left end of the base portion 13a toward the inner surface. A pair of upper and lower notches 13h, 13k penetrating in the left-right direction are formed in the wall portion 13b. The positive electrode terminal 14 and the negative electrode terminal 15 are inserted into slits formed in the left-right centers of the notches 13h, 13k, and the long portions 14a, 15a are disposed in the mounting portions 13d, 13e formed on the base portion 13a, respectively, by insert molding, as described above.

[0054] Furthermore, in the mounting member 13, the wall portion 13c is formed in a generally elliptical shape rising from the right end of the base portion 13a toward the inner surface. A notch 13m penetrating the wall portion 13c in the left-right direction is formed at the approximate center of the top and bottom of the wall portion 13c. As shown in Fig. 2, an electric wire 29 connecting the terminal portions 10a and 10b of the power supply adjustment board 10 to the connector 27 is inserted into the notch 13m. In the first embodiment, the electric wire 29 is routed so that there is sufficient flexure between the terminal portions 10a and 10b of the power supply adjustment board 10 and the wall portion 13c when the electric wire 29 is inserted through the notch 13m of the mounting member 13.

[0055] Next, we will explain how to attach and detach the power supply unit 101. First, when attaching the power supply unit 101, the electric wires 29 extending from the connector 27 are connected to the terminal portions 10a and 10b of the power supply adjustment board 10 fixed to the mounting member 13 held by the holder 100.

[0056] Next, the power supply unit 101 is inserted through the opening 22a of the cover member 22 that constitutes the housing 20. More specifically, the power supply unit 101 is inserted while being guided by a guide portion G (see FIG. 5) that is composed of a concave groove 100g formed in the holder 100 and a pair of convex portions 122m formed in the inner case 122, and the convex portion 122n formed on the inner case 122 is fitted into a through hole 100h formed in the holder 100, whereby the power supply unit 101 is locked to the housing 20 by the locking mechanism P (see FIG. 5).

[0057] Next, with the right end of the connector 27 connected to the power supply unit 101 inserted through the through-hole 23g of the cap member 23, the threaded portion 23d of the cap member 23 is screwed into a threaded portion (not shown) formed on the inner circumferential surface of the right end of the cover member 22. At this time, the cap member 23 rotates relative to the connector 27, preventing twisting of the electric wires 29 inside the housing 20.

[0058] Finally, a waterproof nut 28 is screwed from the right side onto a threaded portion (not shown) formed on the outer circumferential surface of the connector 27 exposed to the outside through the through hole 23g of the cap member 23.

[0059] When removing the power supply unit 101, first, the waterproof nut 28 that secures the connector 27 to the cap member 23 is turned and removed, and then the cap member 23 is turned and removed from the right end portion of the cover member 22. At this time, the cap member 23 rotates relative to the connector 27 in the same way as when the power supply unit 101 is attached, so that the electric wires 29 are prevented from twisting inside the housing 20.

[0060] Next, the gripping portion 100d of the holder 100 is gripped and the power supply unit 101 is pulled out, thereby removing the power supply unit 101 together with the connector 27 and the electric wires 29. At this time, gripping the gripping portion 100d of the holder 100 makes it easy to apply force to the power supply unit 101 in the pulling direction. This easily releases the state in which the power supply unit 101 is locked to the housing 20 by the locking mechanism P (see FIG. 5), making it easy to remove the power supply unit 101.

[0061] According to this, by locking the power supply unit 101 to the housing 20 using the locking mechanism P (see FIG. 5 ), the pressure sensor 1 can ensure that the positive and negative terminals 42 and 43 of the housing 20 are in electrical contact with the positive and negative terminals of the power supply unit 101, i.e., the positive and negative terminals 14 and 15 of the mounting member 13 held by the holder 100. Furthermore, by closing the opening of the housing 20, i.e., the opening 22a of the cover member 22, with the cap member 23, the interior of the housing 20 that houses the power supply unit 101 is made into a sealed space, and an external power source can be connected to the power supply adjustment board 10 housed in the housing 20 via the connector 27 and the electric wire 29 that pass through the cap member 23 in a sealed state. Therefore, it is possible to achieve both stable electrical contact between the positive and negative terminals 42 and 43 of the housing 20 and the positive and negative terminals 14 and 15 of the mounting member 13 held by the holder 100, and a sealed interior of the housing 20. In other words, in this embodiment, electrical connection and sealing are realized by separate means, and therefore these functions can be achieved with high precision.

[0062] Furthermore, by locking the power supply unit 101 to the housing 20 using the locking mechanism P, the positive terminal 42 and negative terminal 43 of the housing 20 and the positive terminal 14 and negative terminal 15 of the mounting member 13 held by the holder 100 are in elastic contact with each other, thereby ensuring electrical contact and enabling reliable power supply.

[0063] Furthermore, the power supply adjustment board 10 is detachably held by the holder 100 while being fixed to the mounting member 13. Therefore, the power supply adjustment board 10 can be protected by the mounting member 13.

[0064] 6(a), the mounting member 13 is attached to the holder 100 in a direction perpendicular to the insertion direction of the holder 100 into the housing 20. Therefore, the insertion of the power supply unit 101 into the housing 20 has little effect on the state in which the mounting member 13 is held in the holder 100, and the mounting member 13 is stably held by the holder 100. Therefore, by locking the power supply unit 101 to the housing 20 with the locking mechanism P, the positive and negative terminals 42 and 43 of the housing 20 and the positive and negative terminals 14 and 15 of the mounting member 13 held by the holder 100 are reliably maintained in electrical contact.

[0065] Furthermore, the electric wires 29 constituting the power supply line are flexible, and when the cap member 23 is attached or detached, the electric wires 29 bend, thereby preventing poor contact with the terminal portions 10a, 10b of the power supply adjustment board 10 and the connector 27, and improving the ease of attaching and detaching the cap member 23.

[0066] Furthermore, the electric wire 29 is wired so as to have flexibility between the terminal portions 10a, 10b of the power supply adjustment board 10 and the wall portion 13c when inserted through the notch 13m of the mounting member 13, so that poor contact or short circuit is unlikely to occur even if the electric wire 29 is pulled when the cap member 23 is attached or detached or when the holder 100 is inserted or detached.

[0067] 6, the walls 100b, 100c of the holder 100 each have a notched space formed at the top and bottom, forming a cantilevered plate shape that stands up from both the left and right ends of the base 100a. This makes it easier for the walls 100b, 100c of the holder 100 to elastically clamp the mounting member 13 in the longitudinal direction.

[0068] Moreover, since the wall portion 100b is located between the positive electrode terminal 14 and the negative electrode terminal 15 of the mounting member 13, it is possible to provide well-balanced support for the power supply unit 101. Furthermore, the positive electrode terminal 14 and the negative electrode terminal 15 of the mounting member 13 are less likely to short-circuit.

[0069] Furthermore, since the positive terminal 14 and negative terminal 15 of the mounting member 13 do not protrude outward from the wall portion 100b, other members are less likely to come into contact with the positive terminal 14 and negative terminal 15 of the mounting member 13 when attaching or detaching the power supply unit 101.

[0070] The holder 100 also includes a wall 100b that abuts against the wall 13b of the mounting member 13, and the wall 100b is provided with cutouts that expose the positive and negative terminals 14 and 15 of the mounting member 13. This allows the positive and negative terminals 14 and 15 of the mounting member 13 to be exposed through the cutouts provided in the wall 100b while the wall 100b is abutting against the wall 13b of the mounting member 13. In other words, the longitudinal positions of the positive and negative terminals of the power supply unit 101 are restricted to predetermined positions. This ensures reliable contact with the positive and negative terminals 42 and 43 of the housing 20. Furthermore, the power supply unit 101 can be made compact in the longitudinal direction.

[0071] The holder 100 also has a pair of upper and lower claws 100e that clamp the mounting member 13 in the short-side direction, i.e., the direction in which the positive terminal 14 and the negative terminal 15 of the mounting member 13 are arranged side by side. This allows the holder 100 to clamp the mounting member 13 not only in the long-side direction but also in the short-side direction, thereby more stably holding the mounting member 13. This allows for more reliable contact with the positive terminal 42 and the negative terminal 43 of the housing 20.

[0072] Furthermore, because the holder 100 can be attached and detached while the pressure sensor 1 is installed in an installation location such as a pipe, maintenance work and the like can be easily performed. Specifically, maintenance work can be easily performed by removing only the cap member 23 and inserting and detaching only the holder 100 that holds the mounting member 13, 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 during maintenance work, allowing the pressure sensor 1 to stably sense the measurement target. Furthermore, because there is no need to remove the pressure sensor 1 from a pipe or the like, there is no need to stop the operation of the fluid system equipped with the pipe during maintenance work.

[0073] In addition, since the holder 100 is provided with a grip portion 100d, by removing the cap member 23 and gripping the grip portion 100d of the holder 100, it is easy to remove the power supply unit 101 from the state in which the power supply unit 101 is engaged with the housing 20.

[0074] 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 connecting 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.

[0075] Furthermore, the positive and negative terminals of the power supply unit 101, i.e., the positive and negative terminals 14 and 15 of the mounting member 13 held by the holder 100, may be arranged side by side vertically, and need not be in the same left-right position.

[0076] Furthermore, the mounting member 13 and the positive and negative terminals 14 and 15 are not limited to being integrally molded, but may instead be configured such that, for example, the long portions 14a and 15a of the positive and negative terminals 14 and 15 are inserted into and fixed to mounting portions 13d and 13e formed on the base 13a of the mounting member 13. [Example]

[0077] Second Embodiment An electronic device according to a second embodiment will be described with reference to Figures 8 and 9. Note that a description of the same configuration as in the first embodiment will be omitted.

[0078] As shown in Figures 8 and 9, the pressure sensor 201 of this embodiment 2 differs from the pressure sensor 1 of embodiment 1 in that the connector 227 serving as the power supply line is extended to the outside of the cap member 223 by a cable 227a that is made by bundling together and covering the electric wires 229 serving as the power supply line.

[0079] 9, a through-hole 223g penetrating in the left-right direction is formed in the base 223a of the cap member 223. A waterproof cable gland 228 (see FIG. 8) with a cable 227a inserted therethrough is attached to the through-hole 223g. The cable gland 228 is composed of a gland body 228a, a lock nut 228b, and a seal nut 228c.

[0080] Here, we will explain how to attach the cable gland 228 to the cap member 223. First, the left end of the gland body 228a is inserted from the right side into the through-hole 223g of the cap member 223, and the lock nut 228b is screwed from the left side onto a threaded portion (not shown) formed on the outer circumferential surface of the left end of the gland body 228a. As a result, the base 223a of the cap member 223 is clamped between the flange 228d formed on the gland body 228a and the lock nut 228b, and the gland body 228a is attached to the cap member 223 in a substantially sealed state. In this state, the cable 227a inserted through the through-hole 228e penetrating the gland body 228a in the left-right direction can rotate relative to the cap member 223 and the gland body 228a.

[0081] Next, the seal nut 228c is screwed from the right side onto a threaded portion (not shown) formed on the outer peripheral surface of the right end of the gland body 228a. The seal nut 228c is inserted into the cable 227a before the cable 227a is inserted into the through-hole 228e of the gland body 228a. By attaching the cable gland 228 in this manner, the cable 227a is fixed to the cap member 223 in a substantially sealed state.

[0082] According to this, by closing the opening of housing 20, i.e., opening 22a of cover member 22, with cap member 223 to which cable gland 228 is attached, pressure sensor 201 can form a sealed space inside housing 20, which houses power supply unit 101, and connect an external power source to power supply adjustment board 10 housed in housing 20 via cable 227a that passes through cap member 223 in a sealed state, connector 227, and electric wire 229. Therefore, it is possible to achieve both stable electrical contact between positive terminal 42 and negative terminal 43 of housing 20 and positive terminal 14 and negative terminal 15 of mounting member 13 held by holder 100, and sealed interior of housing 20. [Example]

[0083] Third Embodiment An electronic device according to a third embodiment will be described with reference to Figures 10 to 12. Note that a description of the same configuration as in the first and second embodiments will be omitted.

[0084] The pressure sensor 301 of the third embodiment differs from the pressure sensor 1 of the first and second embodiments in that the power supply unit is a battery instead of a power supply adjustment board.

[0085] As shown in Figures 10 to 12, the pressure sensor 301 of this embodiment 3 is mainly composed of a housing 320 which differs from the embodiments 1 and 2 only in the cap member 323, a sensor unit 30 which is the same as the embodiments 1 and 2, a holder 100 and a circuit unit 40 (see Figure 2).

[0086] In the third embodiment, unlike the first and second embodiments, the cap member 323 does not have a through-hole in the base portion 323a.

[0087] In this third embodiment, a description will be given of a mode in which a pack-type lithium battery 310 (hereinafter simply referred to as "battery 310") in which a positive electrode 310a and a negative electrode 310b are arranged side by side and a spacer 313 formed from a resin material are held at one longitudinal end of the holder 100. In this third embodiment, the holder 100 constitutes a power supply unit 101 by holding the battery 310 and the spacer 313. In this third embodiment, the positive and negative terminals of the power supply unit 101 are the positive and negative electrodes 310a and 310b of the battery 310.

[0088] The inner surface of the first plate portion 122d of the inner case 122 is curved to fit the surface shape of the battery 310 held in the holder 100 (see FIG. 3). A rectangular protrusion 122h formed on the left end (right end in FIG. 3) of the inner surface of the first plate portion 122d can fit into a recess 310c (see FIGS. 11 and 12) formed on the surface of the battery 310. This restricts the insertion and removal direction of the holder 100 into the inner case 122, preventing reverse connection of the battery 310.

[0089] 11 and 12(b), when the battery 310 and spacer 313 are held in the holder 100, the positive electrode 310a and negative electrode 310b are arranged side by side at the left end, i.e., one longitudinal end, of the battery 310. The spacer 313 abuts the right end, i.e., the other longitudinal end, of the battery 310 against the wall 100c of the holder 100. The left-right distance between the walls 100b, 100c of the holder 100 is configured to be equal to or slightly shorter than the sum of the left-right dimensions of the battery 310 and the spacer 313.

[0090] According to this, by locking the power supply unit 101 to the housing 20 using the locking mechanism P (see FIG. 5 ), the pressure sensor 301 can ensure that the positive and negative terminals of the power supply unit 101, i.e., the positive electrode 310 a and the negative electrode 310 b of the battery 310 held in the holder 100, are in electrical contact with the positive and negative terminals 42 and 43 of the housing 320. Furthermore, by closing the opening of the housing 320 with the cap member 323, the interior of the housing 320 that houses the power supply unit 101 can be made into a sealed space. Therefore, it is possible to achieve both stable electrical contact between the positive and negative terminals 42 and 43 of the housing 320 and the positive and negative electrodes 310 a and 310 b of the battery 310 held in the holder 100 and a sealed interior of the housing 320.

[0091] Furthermore, in the third embodiment, the positive electrode 310a and the negative electrode 310b of the battery 310 held in the holder 100 can be used as the positive and negative terminals of the power supply unit 101, so that the configuration of the spacer 313 can be simplified.

[0092] Furthermore, in the third embodiment, the power supply unit is configured with a battery and a spacer corresponding to the shape of the battery, and by using a spacer corresponding to the shape of the battery used in the power supply unit 101, batteries and spacers of different shapes can be held by the common holder 100. For example, the power supply unit 101 may be configured with batteries other than the above-mentioned pack-type lithium battery, such as button batteries, AA batteries, AAA batteries, square batteries, or coin batteries, and spacers corresponding to the shapes of these batteries held by the common holder 100.

[0093] Furthermore, in the present invention, a common holder 100 can be used to hold the mounting member 13 to which the power supply adjustment board 10 is fixed as in Examples 1 and 2, or the battery 310 and spacer 313 as in Example 3. Therefore, by using a cap member that corresponds to the power supply unit to be used, the pressure sensor can selectively use an external power supply or a battery as its power source depending on the installation location, usage environment, etc.

[0094] 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.

[0095] 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.

[0096] Furthermore, the control chip and wireless chip that constitute the circuit unit may be provided at any position on the circuit board.

[0097] In the above-described embodiment, the positive and negative terminals of the housing member are configured to be extendable and contractible. However, the present invention is not limited to this. The positive and negative terminals of the power supply unit may be configured to be extendable and contractible. Both the positive and negative terminals of the housing member and the positive and negative terminals of the power supply unit may be configured to be extendable and contractible. For example, by applying a probe pin or spring terminal configuration to the positive and negative terminals 14 and 15 of the mounting member 13 in the first and second embodiments, the electrical contacts of the positive and negative terminals may protrude from notches provided in the wall portion 100b of the holder 100.

[0098] Furthermore, in the first and second embodiments, a waterproof nut or a cable gland is used to pass the power supply line, which can be connected to an external power source, through the through hole of the cap member in a sealed state. However, the present invention is not limited to this, and a gasket or the like may be used to ensure sealing between the power supply line and the cap member.

[0099] Furthermore, the mounting member to which the power supply adjustment board is fixed is not limited to one that is detachably attached to the holder, and the mounting member and the holder may be formed integrally.

[0100] The power supply adjustment board may also be held directly by a holder without using a mounting member. In this case, the positive and negative terminals of the power supply unit, which are electrically connected to the terminal portions of the power supply adjustment board, may be provided side by side at one longitudinal end of the power supply adjustment board.

[0101] The locking mechanism P is not limited to being configured by fitting a convex portion of the inner case into a through-hole of the holder, but may be configured by a concave-convex fit between a concave portion formed in the holder and a convex portion formed in the inner case. The locking mechanism may also be configured by a concave-convex fit between a convex portion formed in the holder and a through-hole or concave portion formed in the inner case. [Explanation of symbols]

[0102] 1. Pressure sensor (electronic device) 10 Power adjustment board (power supply section) 10a,10b terminal section 13 Mounting material 14 Positive terminal (positive terminal of power supply unit) 15 Negative terminal (negative terminal of power supply unit) 20 Housing (accommodating member) 21 Connecting member 22 Cover member 22a Opening (opening of housing member) 23 Cap member 23g through hole 27 Connector (power supply line) 28 Waterproof Nut 29 Electrical wires (power supply lines) 30 Sensor Unit 40 Circuit Unit 41 Circuit Board 42 Positive terminal (positive terminal of housing member) 43 Negative terminal (negative terminal of housing member) 44 Processing Chips 45 Circuit Board 46 Wireless Chip 100 holder 100b,100c wall part 100d grip part 101 Power supply unit 201 Pressure sensor (electronic device) 223 Cap member 223g through hole 227 Connector (power supply line) 227a cable (power supply line) 228 Cable Gland 228a Grand Main Unit 228b Lock nut 228c seal nut 229 Electrical Wires (Power Supply Lines) 301 Pressure sensor (electronic device) 310 Battery (power supply part) 310a Positive (positive terminal of power supply unit) 310b Negative (negative terminal of power supply unit) 313 Spacer (power supply part) 323 Cap member G guide part P locking mechanism

Claims

1. a power supply unit including a power supply adjustment board and a holder for holding the power supply adjustment board; a housing member for housing the power supply unit inserted through an opening; and a cap member for closing the opening; In the housing member, a positive electrode terminal and a negative electrode terminal are arranged side by side, The power supply unit has a positive terminal and a negative terminal arranged side by side at one end thereof, a locking mechanism is provided that locks the power supply unit in the housing member in a state in which the positive electrode terminal and the negative electrode terminal of the power supply unit are in electrical contact with the positive electrode terminal and the negative electrode terminal of the housing member, The electronic device has a power supply line that can connect an external power source to the power supply adjustment board, and that passes through the cap member in a sealed state.

2. The electronic device according to claim 1 , wherein the power supply adjustment board is detachably held by the holder in a state where the power supply adjustment board is fixed to a mounting member on which the positive terminal and the negative terminal of the power supply unit are provided.

3. The electronic device according to claim 2 , wherein the attachment member is attached to the holder in a direction perpendicular to a direction in which the holder is inserted into the accommodating member.

4. 4. The electronic device according to claim 1, wherein at least a portion of the power supply line is flexible.

5. 5. The electronic device according to claim 1, wherein the holder has a grip portion.

6. a power supply unit including a holder and a power supply section held by the holder; a housing member that houses the power supply unit inserted through an opening; and a cap member that closes the opening; In the housing member, a positive electrode terminal and a negative electrode terminal are arranged side by side, The power supply unit has a positive terminal and a negative terminal arranged side by side at one end thereof, a locking mechanism is provided that locks the power supply unit in the housing member in a state in which the positive electrode terminal and the negative electrode terminal of the power supply unit are in electrical contact with the positive electrode terminal and the negative electrode terminal of the housing member, the power supply unit has one of a battery and a power supply adjustment board to which an external power supply is connected; the holder is capable of selectively holding one of a power supply unit having the battery and a power supply unit having the power adjustment board, The holder has a wall portion that restricts movement of the power supply unit toward one end while the positive terminal and the negative terminal of the power supply unit are exposed at one end of the holder.

7. 7. The electronic device according to claim 6, wherein the power supply unit having the battery comprises the battery and a spacer corresponding to the shape of the battery.

Images