JP2019153485A - Battery holder and sensor unit - Google Patents

Abstract

To provide a battery holder and a sensor unit that can prevent occurrence of a reverse voltage due to erroneous mounting of a battery without requiring a separate protection circuit and can easily remove the battery.SOLUTION: A battery holder according to one embodiment of the present invention includes a support substrate, a first terminal, and a second terminal. The support substrate has a support surface capable of supporting a coin-type or button-type battery. The first terminal is provided on the support surface and configured to be brought into contact with a convex surface portion constituting the first electrode of the battery. The second terminal includes an arm portion having a pair of elastic arms capable of elastically clamping a peripheral surface portion constituting the second electrode of the battery in a radial direction, and a fixing portion for fixing between the arm portion and the support surface. The second terminal is configured such that the battery is inserted into and removed from the arm portion by sliding movement in a direction parallel to the support surface.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a battery holder for coin-type or button-type batteries and a sensor unit including the same.

  For example, coin-type or button-type batteries (hereinafter also referred to as coin batteries) are widely used as power sources for electronic components such as sensors and electronic devices. In the coin battery, the convex surface portion constitutes a negative electrode (minus electrode), and the main surface and the peripheral surface opposite to the convex surface portion constitute a positive electrode (plus electrode).

  As a battery holder that is electrically connected to a coin battery, a battery holder that includes a recess capable of accommodating a coin battery and two terminal portions arranged to face each other in the thickness direction of the coin battery is known. Of the two terminal parts, one terminal part is generally arranged at the bottom of the concave part, and the other terminal part is generally attached to a lid part covering the concave part (see, for example, Patent Document 1). .

  On the other hand, in this type of battery holder, when the coin battery is mounted with the positive electrode and the negative electrode being reversed in direction, a reverse voltage is applied to the load and the device may be damaged. In order to prevent damage to the device due to such erroneous mounting of the coin battery, for example, a method of clearly indicating the mounting direction, performing physical keying, or interposing a protection circuit such as a diode is generally used. Patent Document 2 discloses a power supply polarity optimization circuit that can apply the same voltage to a load regardless of the polarity direction of the battery.

JP 2004-303616 A JP-A-9-98540

  However, this type of protection circuit is difficult to apply to a small electronic device with limited space, and further, it consumes battery power even with a small amount due to a voltage drop or the like. is there. Moreover, the structure in which the coin battery is accommodated in the recess has a problem that it is difficult to remove the coin battery from the recess during replacement or the like.

  In view of the circumstances as described above, an object of the present invention is to provide a battery holder that can prevent generation of a reverse voltage due to erroneous mounting of a battery without requiring a separate protection circuit, and can easily take out the battery. It is to provide a sensor unit.

In order to achieve the above object, a battery holder according to an embodiment of the present invention includes a support substrate, a first terminal, and a second terminal.
The support substrate has a support surface capable of supporting a coin-type or button-type battery.
The first terminal is provided on the support surface and configured to be in contact with a convex surface portion constituting the first electrode of the battery.
The second terminal is fixed between an arm portion having a pair of elastic arms capable of elastically holding a peripheral surface portion constituting the second electrode of the battery in a radial direction, and the arm portion and the support surface. And a fixing portion. The second terminal is configured such that the battery is inserted into and removed from the arm portion by sliding movement in a direction parallel to the support surface.

In the battery holder, a second terminal having a first terminal that can contact the convex surface portion (first electrode) of the battery and an arm portion that can elastically clamp the peripheral surface portion (second electrode) of the battery in the radial direction. Since the terminal is provided, generation of a reverse voltage can be prevented even when the direction of the battery electrode is reversed. As a result, it is possible to prevent the occurrence of a reverse voltage due to erroneous battery mounting without requiring a separate protection circuit.
In addition, since the second terminal is configured such that the battery is inserted into and removed from the arm portion by sliding movement in a direction parallel to the support surface, the battery can be easily taken out from the battery holder. .

The second terminal has a battery housing area and an insertion / extraction opening formed between the pair of elastic arms, and the fixing portion is arranged to face the insertion / extraction opening across the battery accommodation area. Also good.
Thereby, a battery can be stably attached to the second terminal.

The arm portion may further include a hollow portion that is formed between the fixed portion and the pair of arm portions and communicates with the battery housing region.
Thereby, a battery can be easily removed from a 2nd terminal by using the jig | tool etc. which can be engaged with a hollow part.

A sensor unit according to an embodiment of the present invention includes a housing, a sensor element, and a battery holder.
The said housing | casing has an opening part and is comprised so that attachment to an apparatus is possible.
The sensor element is attached to the device and detects a predetermined physical quantity of the device.
The battery holder is disposed in the housing and configured to be capable of mounting a coin-type or button-type battery.
The battery holder includes a support substrate, a first terminal, and a second terminal.
The support substrate has a support surface capable of supporting the battery and a processing circuit for processing the output of the sensor element, and is electrically connected to the sensor element.
The first terminal is provided on the support surface and configured to be in contact with a convex surface portion constituting the first electrode of the battery.
The second terminal is fixed between an arm portion having a pair of elastic arms capable of elastically holding a peripheral surface portion constituting the second electrode of the battery in a radial direction, and the arm portion and the support surface. And a fixing portion. The second terminal is configured such that the battery is inserted into and removed from the arm portion by sliding movement in a direction parallel to the support surface.

  The support substrate may further include a component mounting surface opposite to the support surface, and the processing circuit may include a communication module mounted on the component mounting surface and capable of transmitting the output of the sensor element.

  The second terminal is formed between the battery accommodating region formed between the pair of elastic arms, the battery insertion / extraction port, the fixing portion and the pair of arm portions, and communicates with the battery accommodating region. The sensor unit may further include a support body that is mounted inside the housing and has a first groove portion and a second groove portion at one end portion on the opening side. . The first groove portion accommodates the battery holder with the insertion / extraction opening facing the opening, and the second groove portion is formed so as to intersect the first groove portion. A passage portion communicating with the hollow portion of the battery holder accommodated is included.

  The sensor unit may further include a lid configured to be attachable to the opening. The lid body has a claw portion that is inserted into the second groove portion and engageable with an inner wall surface of the housing.

  As described above, according to the present invention, it is possible to prevent the occurrence of a reverse voltage due to erroneous mounting of a battery without requiring a separate protection circuit, and it is possible to easily remove the battery.

It is a top view of the principal part of the battery holder which concerns on one Embodiment of this invention. It is a side view of the said battery holder. FIG. 4 is a plan view of the main part of the battery holder 100 for explaining the operation of inserting and removing the battery 1. It is a top view of the principal part of the said battery holder explaining the insertion / extraction operation of a battery. It is a side view of the said battery holder explaining an example of the battery insertion / extraction operation method. It is a perspective view of a sensor unit concerning one embodiment of the present invention. It is a disassembled perspective view of the said sensor unit. It is a longitudinal cross-sectional view of the sensor unit.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<First Embodiment>
FIG. 1 is a plan view of a main part of a battery holder 100 according to an embodiment of the present invention, FIG. 2 is a side view thereof, and FIG. is there.

[Battery holder]
The battery holder 100 of the present embodiment is for holding a coin-type or button-type battery (hereinafter simply referred to as the battery 1), and is electrically connected to the support substrate 10 on which the battery 1 is mounted and the battery 1 respectively. The first terminal 11 and the second terminal 12 are connectable.

  The support substrate 10 has a support surface 10 s that can support the battery 1. The support surface 10 s constitutes a main surface on one side of the support substrate 10. On the support surface 10s, wirings L1 and L2 (shaded portions in FIG. 1) that are electrically connected to the first terminal 11 and the second terminal 12 are patterned in an appropriate shape. The support surface 10s is covered with an insulating protective layer (not shown) such as a solder resist that covers the wirings L1 and L2.

  The support substrate 10 is configured by a single-sided wiring substrate in which a wiring layer is formed on the supporting surface 10s, or a double-sided wiring substrate in which a wiring layer is formed on the supporting surface 10s and the main surface 10p on the opposite side. The support substrate 10 is typically composed of a rigid organic substrate having a glass epoxy resin or the like as an insulating layer, but is not limited thereto, and may be composed of a ceramic substrate or the like. An appropriate circuit component (passive element, active element) may be mounted on at least one main surface of the support substrate 10. The planar shape of the support substrate 10 is not particularly limited, and is typically formed in a rectangular shape or a strip shape.

  The first terminal 11 is provided on the support surface 10 s and is configured to be able to come into contact with the convex surface portion 1 a constituting the negative electrode (first electrode) of the battery 1. The first terminal 11 is an island-shaped terminal electrically connected to the wiring L1, and is exposed to the outside through an opening pattern formed by removing a part of the insulating protective layer. The first terminal 11 is preferably formed so as to protrude upward from the support surface 10 s in order to ensure a stable contact with the convex surface portion 1 a of the battery 1.

  The first terminal 11 is typically made of a conductive material such as metal. The first terminal may have a multilayer structure in which a plating layer, a metal piece made of stainless steel, or the like is laminated on a part of the wiring layer in order to improve durability against contact friction with the battery 1. The planar shape of the first terminal 11 is not particularly limited, and is formed in a rectangular shape in the present embodiment, but may be other shapes such as a circular shape and a dome shape. The size of the first terminal 11 is not particularly limited, and can be set as appropriate according to the size of the battery 1.

  The second terminal 12 includes an arm part 121 and a fixing part 122. In the present embodiment, the second terminal 12 is formed by pressing a metal leaf spring into a predetermined shape. As shown in FIG. 3, the second terminal 12 is configured such that the battery 1 is inserted into and removed from the arm portion 121 by sliding movement in a direction parallel to the support surface 10 s.

  The arm part 121 has a pair of elastic arms 121a and 121b capable of elastically holding the peripheral surface part 1c constituting the positive electrode (second electrode) of the battery 1 in the radial direction. The fixing part 122 fixes between the arm part 121 and the support surface 10s. The fixing portion 122 supports the arm portion 121 in parallel to the support surface 10s with a predetermined gap between the fixing portion 122 and the support surface 10s. The method for joining the fixing portion 122 to the support surface 10 s is not particularly limited, and is typically joined by soldering. The fixing portion 122 is electrically connected to the wiring L2 through a part of the wiring layer on the support surface 10s.

  The 2nd terminal 12 has the battery accommodation area | region V and the insertion / extraction opening W which were formed between a pair of elastic arms 121a and 121b (refer FIG. 1). The pair of elastic arms 121a and 121b are configured to be elastically deformable in directions toward or away from each other with the fixed portion 122 as a fulcrum. The volume of the battery accommodating area V changes according to the deformation amount of the pair of elastic arms 121a and 121b, and the volume when the battery is not accommodated is set smaller than the capacity when the battery is accommodated. Thereby, the desired clamping force can be expressed with respect to the peripheral surface part 1c of the battery 1 by the pair of elastic arms 121a and 121b when the battery 1 is accommodated.

  The pair of elastic arms 121 a and 121 b are arranged so as to surround the first terminal 11 and have a symmetrical shape with respect to an axis parallel to the insertion / extraction direction of the battery 1. In the present embodiment, the pair of elastic arms 121 a and 121 b are formed to be curved in an arc shape so as to correspond to the shape of the peripheral surface portion 1 c of the battery 1. Thereby, since the inner peripheral surface of each arm part 121a, 121b can be closely_contact | adhered over the wide range of the peripheral surface part 1c of the battery 1, the battery 1 is stably hold | maintained in the battery accommodating area | region V. FIG.

  The insertion / extraction opening W is formed between the tips (free ends) of the pair of elastic arms 121a and 121b. The opening width of the insertion / extraction opening W (parallel to the support surface 10 s and perpendicular to the insertion / extraction direction of the battery 1, hereinafter the same) varies depending on the relative positions of the pair of elastic arms 121 a, 121 b. In some cases, it expands to a size corresponding to the diameter of the battery 1 (see FIG. 3). In order to facilitate the insertion of the battery 1 into the housing region V, guide portions 121c that are curved outward are formed at the tips (free ends) of the elastic arms 121a and 121b that form the insertion / extraction opening W, respectively.

  The fixing portion 122 is disposed to face the insertion / extraction opening W with the battery housing region V interposed therebetween. Thereby, the desired deformation | transformation of the arm part 121 at the time of being inserted in the battery accommodating area V via the insertion / extraction opening W can be supported stably in the fixing | fixed part 122, and the deformation | transformation which the arm part 121 does not intend is prevented. The battery 1 can be mounted stably.

  In addition, since the pair of elastic arms 121a and 121b have a symmetrical shape with respect to an axis parallel to the insertion / removal direction of the battery 1, the elastic arms 121a and 121b are deformed in the opposite directions when the battery 1 is inserted or removed Can be deformed in quantity. Thereby, the battery 1 can be inserted / removed while minimizing the deformation amount of each elastic arm 121a, 121b.

  The arm part 121 further includes a hollow part 121d formed between the pair of elastic arms 121a and 121b and the fixed part 122. The hollow portion 121d has a space portion that communicates with the base end portions of the pair of elastic arms 121a and 121b and communicates with the battery housing region V. The shape of the hollow portion 121d is not particularly limited, and is typically formed in a substantially partial cylindrical shape having an axial center in a direction orthogonal to the support surface 10s.

  Since the arm portion 121 has the hollow portion 121d, for example, as shown in FIG. 4, the arm portion 121 is held in the battery housing portion V using a shaft-shaped jig M having a projection Ma that can be engaged with the hollow portion 121d. The battery 1 can be taken out. For example, in order to secure a stable holding force of the battery 1 by the battery holder 100, the holding force of the arm portion 121 with respect to the battery 1 is relatively strong, and even when it is difficult to slide the battery 1 with a finger, the hollow portion 121d By using the engageable jig M, the battery 1 can be easily taken out.

  In the battery holder 100 of the present embodiment configured as described above, the first terminal 11 that can contact the convex surface portion 1a (first electrode) of the battery 1 and the peripheral surface portion 1c (second electrode) of the battery are provided. Since the second terminal 12 having the arm portion 121 that can be elastically clamped in the radial direction is provided, the direction of the electrode of the battery 1 is reversed (the main surface 1b facing the convex surface portion 1a is directed to the support surface 10s side). Even if it is mounted, since the polarity between the terminals 11 and 12 is the same, no reverse voltage is generated. As a result, it is possible to prevent the occurrence of a reverse voltage due to erroneous battery mounting without requiring a separate protection circuit.

  The support substrate 10 may be provided with a monitoring circuit that monitors the power supply voltage of the battery 1. In this case, according to the present embodiment, it is possible to effectively prevent the generation of the reverse voltage between the terminals 11 and 12 due to the erroneous insertion of the battery 1, so that an intervening diode for protecting the monitoring circuit from the reverse voltage is provided. No need to wear. Moreover, since a power supply voltage drop that may occur when a diode is interposed does not occur, the power supply voltage can be monitored with high accuracy by the monitoring circuit, and the life of the battery 1 can be extended.

  Furthermore, according to the present embodiment, the battery 1 is configured to be inserted into and removed from the arm portion 121 by sliding the second terminal 12 in a direction parallel to the support surface 10 s. The battery 1 can be easily taken out. Thereby, the battery 1 can be easily inserted into and removed from the battery holder 100 only by sliding the battery 1 with a finger. Further, as schematically shown in FIG. 4, the battery 1 can be easily taken out using the jig M even when the battery holder 100 is housed in the case C and the finger cannot be taken out. it can.

<Second Embodiment>
Subsequently, a second embodiment of the present invention will be described. FIG. 5 is a perspective view of a sensor unit 200 according to an embodiment of the present invention, FIG. 6 is an exploded perspective view thereof, and FIG. 7 is a longitudinal sectional view thereof.
Hereinafter, the configuration different from the first embodiment will be mainly described, and the same configuration as the first embodiment will be denoted by the same reference numeral, and the description thereof will be omitted or simplified.

[Sensor unit]
The sensor unit 200 of the present embodiment is configured as a sensor device for monitoring the state of equipment installed in a production line for machine parts and electronic parts, for example. The sensor unit 200 includes a housing 21 that can be attached to the device, a sensor element 30 that detects the state of the device, and a battery holder 100 on which the battery 1 that is a driving power source of the sensor unit 200 can be mounted.

  The casing 21 is formed of, for example, a synthetic resin or metal cylinder having one end attached to the device and the other end opened. The sensor element 30 is attached to a device and configured to detect a predetermined physical quantity (for example, acceleration, temperature) of the device. The battery holder 100 is disposed inside the housing 21 and supports a communication module that can wirelessly communicate the output of the sensor element 30 to an external device.

  As shown in FIGS. 5 and 6, the battery holder 100 is housed inside the housing 21 via a columnar support 23. The support 23 is made of, for example, a synthetic resin material having shock absorption, and positions the battery holder 100 at a predetermined position inside the housing 21. A cross-shaped slot 23 a having a transverse groove 23 a 1 (first groove portion) and a longitudinal groove 23 a 2 (second groove portion) intersecting each other is formed at one end of the support body 23. The lateral groove 23a1 is formed with a length smaller than the diameter of the support 23, and has a width and a depth capable of accommodating the battery holder 100 with the insertion / extraction opening W facing the opening 21a. The vertical groove 23a2 is formed with a length corresponding to the diameter of the support 23 so as to cut out a part of the support 23. The vertical groove 23a2 includes a passage portion 230 that communicates with the hollow portion 121d of the battery holder 100 housed in the horizontal groove 23a1 (FIG. 7).

  The battery holder 100 is configured in the same manner as in the first embodiment, and includes a support substrate 10 and first and second terminals 11 and 12. As shown in FIGS. 6 and 7, the support substrate 10 includes, in addition to the first and second terminals 11 and 12, processing circuits (31 and 32) for processing the output of the sensor element 30, A connector 33 for electrically connecting to the support substrate 10 is mounted.

  The processing circuit includes a circuit component 31 such as an IC for calculating state quantities such as an acceleration signal and a temperature signal from the output of the sensor element 30, and a communication module 32 for wirelessly transmitting the output of the circuit component 31 to the outside. It is mounted on the component mounting surface of the support substrate 10 (main surface 10p opposite to the support surface 10s in this example). The connector 33 connects the wiring cable 34 connected to the sensor element 30 to the support substrate 10.

  The battery 1 attached to the battery holder 100 supplies driving power to the sensor element 30, the circuit component 31, and the communication module 32. The battery holder 100 is arranged so that the insertion / extraction direction of the battery 1 is parallel to the axial direction of the housing 21, and the slot 23 a ( It is inserted into the lateral groove 23a1). As shown in FIG. 7, the support substrate 10 of the battery holder 100 has a length such that one end contacts the bottom of the casing 21 and the other end protrudes from the opening 21 a of the casing 21.

  The sensor unit 200 further includes a lid 22 that closes the opening 21 a of the housing 21. The lid body 22 has a pair of claw portions 22a that are inserted into the vertical groove 23a2 of the slot 23a and can be engaged with a part of the inner wall surface of the housing 21 that faces the vertical groove 23a2. On the inner surface of the lid 22, there is a recess 22 b that can support one end of the support substrate 10 of the battery holder 100 accommodated in the housing 21.

  The lid 22 is normally attached to the housing 21 and holds the battery holder 100 between the recess 22 b and the bottom of the housing 21. The lid 22 is removed from the housing 21 when the battery 1 is inserted and removed from the battery holder 100. The material which comprises the cover body 22 will not be specifically limited if it is a material which can permeate | transmit the communication electromagnetic wave of the communication module 32. FIG.

  The sensor unit 200 configured as described above extracts a predetermined state signal (acceleration signal, temperature signal) from the sensor element 30 attached to the device whose state is to be monitored, and extracts the extracted state signal from the communication module 32 to the outside. It transmits to a device (for example, a terminal device or a cloud server). Thereby, while being able to monitor the driving | running state of object apparatus, a failure and abnormality can be detected rapidly.

  When the battery 1 of the sensor unit 200 is replaced, the lid 22 is removed from the casing 21 and the opening 21a of the casing 21 is exposed. Then, the jig M (see FIG. 4) is inserted into the passage portion 230 constituting the longitudinal groove 23a2 of the support 23, and the protrusion Ma at the tip is engaged with the hollow portion 121d of the arm portion 121 of the battery holder 100. The battery 1 is removed from the battery holder 100 through the opening 21a by being pulled out along the axial direction of the casing 21. When the new battery 1 is inserted, the battery 1 is attached to the battery holder 100 by pushing the battery 1 in the axial direction of the housing 1 toward the insertion / extraction opening W exposed from the opening 21a.

  According to the present embodiment, even if the battery holder 100 is mounted with the battery 1 in the reverse direction, a reverse voltage is not generated between the terminals 11 and 12, so a load such as the circuit component 31 or the communication module 32 is applied. It can protect effectively from the said reverse voltage. Further, since the battery 1 can be easily removed even if the opening 21a of the housing 21 is narrow, the sensor unit 200 can be downsized.

  As mentioned above, although embodiment of this invention was described, this invention is not limited only to the above-mentioned embodiment, Of course, a various change can be added.

  For example, in the above embodiment, the example in which the sensor unit 200 is applied to a small sensor device for device state monitoring or abnormality monitoring has been described. However, the sensor unit 200 is not limited to this, and is not limited to this. The present invention can also be applied to units and the like.

  In the above embodiment, the battery holder 100 having a single battery housing area V is taken as an example. However, the present invention is not limited to this, and the present invention can also be applied to a battery holder having a plurality of battery housing areas. is there.

DESCRIPTION OF SYMBOLS 10 ... Support substrate 10s ... Support surface 11 ... 1st terminal 12 ... 2nd terminal 21 ... Housing | casing 21a ... Opening part 22 ... Cover body 22a ... Nail | claw part 23 ... Support body 23a1 ... Horizontal groove (1st groove part)
23a2 ... Vertical groove (second groove)
DESCRIPTION OF SYMBOLS 30 ... Sensor element 32 ... Communication module 100 ... Battery holder 121 ... Arm part 121a, 121b ... Elastic arm 121d ... Hollow part 122 ... Fixed part 200 ... Sensor unit 230 ... Passage part

Claims (7)

A support substrate having a support surface capable of supporting a coin-type or button-type battery;
A first terminal provided on the support surface and capable of contacting a convex surface portion constituting the first electrode of the battery;
An arm portion having a pair of elastic arms capable of elastically sandwiching a peripheral surface portion constituting the second electrode of the battery in a radial direction; and a fixing portion fixing between the arm portion and the support surface. A battery holder comprising: a second terminal configured to be inserted into and removed from the arm portion by sliding movement in a direction parallel to the support surface. The battery holder according to claim 1,
The second terminal has a battery accommodating region and an insertion / extraction port formed between the pair of elastic arms,
The said fixing | fixed part is arrange | positioned facing the said insertion / extraction port on both sides of the said battery accommodation area | region. Battery holder. The battery holder according to claim 2,
The arm part further includes a hollow part that is formed between the fixed part and the pair of arm parts and communicates with the battery accommodating region. A housing having an opening and configured to be attachable to a device;
A sensor element attached to the device for detecting a predetermined physical quantity of the device;
A battery holder disposed in the housing and capable of mounting a coin-type or button-type battery;
The battery holder is
A support substrate having a support surface capable of supporting the battery and a processing circuit for processing the output of the sensor element;
A first terminal provided on the support surface and capable of contacting a convex surface portion constituting the first electrode of the battery;
An arm portion having a pair of elastic arms capable of elastically sandwiching a peripheral surface portion constituting the second electrode of the battery in a radial direction; and a fixing portion fixing between the arm portion and the support surface. And a second terminal configured such that the battery is inserted into and removed from the arm portion by sliding movement in a direction parallel to the support surface. The sensor unit according to claim 4,
The support substrate further has a component mounting surface opposite to the support surface;
The processing circuit includes a communication module mounted on the component mounting surface and capable of transmitting the output of the sensor element. The sensor unit according to claim 4 or 5,
The second terminal is formed between the battery accommodating region formed between the pair of elastic arms, the battery insertion / extraction port, the fixing portion and the pair of arm portions, and communicates with the battery accommodating region. Further having a hollow portion
The sensor unit further includes a support body that is mounted inside the housing and has a first groove and a second groove at one end on the opening side,
The first groove accommodates the battery holder with the insertion / extraction opening facing the opening,
The second groove portion includes a passage portion that is formed so as to intersect with the first groove portion and communicates with the hollow portion of the battery holder housed in the first groove portion. The sensor unit according to claim 6,
Further comprising a lid configured to be attachable to the opening,
The lid has a claw portion that is inserted into the second groove and engageable with an inner wall surface of the housing.

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