JP4441899B2 - Electronics - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic device, and more particularly to an electronic device including a temperature sensor that detects a temperature at a predetermined position.
[0002]
[Prior art]
2. Description of the Related Art Electronic devices using batteries are known in which a temperature detection sensor is provided in order to cut off current when an abnormality occurs. In such an electronic device, the temperature of a battery or a battery case is detected using an element such as a fuse, a thermostat, or a thermistor.
[0003]
For example, there is known an electronic device that measures the temperature of a battery housed in a battery chamber and controls interruption of current in a circuit based on the result (see Patent Document 1). In this electronic device, a storage space for a temperature detection element is provided in a battery chamber for storing a battery, and the temperature detection element is inserted into the storage space to detect the temperature at a predetermined position.
[0004]
In addition, a battery pack in which a temperature element is disposed at a predetermined position to increase safety with respect to the temperature rise of the battery is known (for example, see Patent Document 2). In this battery pack, the battery case is divided into two parts, and a temperature detection element is connected to the circuit board, housed in one of the battery cases, and fixed with a lid. By opening a window at a position corresponding to the temperature detection element of the battery case, the temperature detection element can measure the battery temperature at a predetermined position when the battery and the circuit board are stored in the case. ing.
[0005]
A battery pack is also known in which a plurality of batteries and electronic components that form a battery protection circuit for a rechargeable battery are housed in a case (see, for example, Patent Document 3). In this battery pack, a temperature detection element is mounted on a flexible printed circuit board (hereinafter referred to as FPC), and a notch is provided surrounding the temperature detection element in a U-shape. In addition, a protrusion is provided at a position corresponding to the temperature detection element on the lid of the battery case. When the battery and the substrate are accommodated in the case, the protrusions press the temperature detecting element, so that the element can be accommodated in a predetermined position without performing the FPC bending work during assembly.
[0006]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-298808 (FIG. 5)
[0007]
[Patent Document 2]
JP-A-7-320708 (FIG. 1)
[0008]
[Patent Document 3]
Japanese Patent Laid-Open No. 7-122249 (FIG. 2)
[0009]
[Problems to be solved by the invention]
However, the conventional electronic devices, battery packs, and battery packs as described above have a complicated structure and a large number of parts, and require a lot of labor and time for assembly.
[0010]
For example, in the technique described in Patent Document 1, since the battery chamber is composed of a plurality of components and a space for storing the temperature detection element is provided in the battery chamber, the structure is complicated and the number of components is large. Further, since the temperature detecting element is inserted into the space and fixed using an adhesive, assembly requires time and effort.
[0011]
Further, in the technique described in Patent Document 2, it is necessary to provide a space for housing the printed board in the case, and to open a window so that the temperature element contacts the battery, and the printed board is fixed with a lid. The structure is complex and the number of parts is large.
[0012]
In the technique described in Patent Document 3, since a notch is provided around the temperature element mounted on the flexible printed circuit board, it becomes difficult to measure the temperature at a predetermined position when the distance between the circuit board and the battery is increased. At the same time, the portion of the board that cannot be used effectively increases. In addition, the structure is complicated, requiring labor and time for processing and assembly.
[0013]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electronic device that detects a temperature at a predetermined position and can be assembled quickly and easily.
[0014]
[Means for Solving the Problems]
In order to achieve the object, an electronic device according to claim 1 is an electronic device including a battery case into which a battery is inserted, a circuit board, and an outer case that houses the battery case and the circuit board. A temperature sensor for detecting the temperature of the case, comprising: a flexible wiring portion attached so as to extend from an end portion of the circuit board; and a sensor portion provided at the tip of the wiring portion A temperature sensor and a positioning member for the temperature sensor provided in the exterior case, and the circuit board and the battery case to which the temperature sensor is attached are pressed when the temperature sensor is accommodated in the exterior case. And a positioning member for positioning the sensor portion of the temperature sensor at a predetermined temperature detection portion of the battery case.
[0015]
In the electronic device according to the first aspect, since the temperature sensor is positioned by the positioning member, the temperature at a predetermined position can be measured, and the shape of the battery case needs to be special for positioning. Absent. In order to position the temperature sensor, the circuit board and the battery case to which the temperature sensor is attached may be housed in the exterior case, so that the assembly can be performed quickly and easily.
[0016]
An electronic apparatus according to a second aspect is the electronic apparatus according to the first aspect, wherein the positioning member is a member integrally formed with the outer case.
[0017]
In the electronic device according to the second aspect, it is not necessary to increase the number of parts, and processing and assembly can be performed quickly and easily.
[0018]
The electronic device according to a third aspect is the electronic device according to the first or second aspect, wherein the positioning member has a concave portion straddling the wiring portion of the temperature sensor, and the concave portion extends in the longitudinal direction of the temperature sensor. It is characterized by restricting the position in the orthogonal direction.
[0019]
In the electronic device according to the third aspect, since the concave portion regulates the position of the temperature sensor, temperature detection at a predetermined position can be more reliably performed.
[0020]
The electronic device according to claim 4 is the electronic device according to claim 3, wherein the concave portion of the positioning member abuts on the battery case so that an external force applied to the exterior case is not applied to the temperature sensor. It is said.
[0021]
In the electronic device according to the fourth aspect, the temperature sensor can be protected from external force.
[0022]
An electronic device according to claim 5 is an electronic device having a battery case into which a battery is inserted, a circuit board, and an exterior case that houses the battery case and the circuit board, for detecting the temperature of the battery case. A temperature sensor comprising a flexible wiring portion attached to extend from an end portion of the circuit board and a sensor portion provided at a tip of the wiring portion, and the battery case And a tubular insertion portion into which the temperature sensor is inserted.
[0023]
In the electronic device according to the fifth aspect, since the temperature sensor is positioned by inserting the temperature sensor into the insertion portion, the temperature at a predetermined position can be measured and the assembly can be performed quickly and easily. it can.
[0024]
An electronic device according to a sixth aspect is the electronic device according to the fifth aspect, wherein the insertion portion includes a hole portion and a protrusion portion formed by protruding an edge of the hole portion. The temperature sensor is protected from external force.
[0025]
In the electronic device according to the sixth aspect, the temperature sensor can be protected from external force.
[0026]
The electronic device according to claim 7 is the electronic device according to claim 5 or 6, wherein the outer case further includes a retaining member for the temperature sensor, and the retaining member is attached to the temperature sensor. The temperature sensor is pressed when the battery case in which the temperature sensor is inserted into the outer case and the battery case in which the temperature sensor is inserted into the insertion portion is prevented, and the temperature sensor is prevented from coming out of the insertion portion. It is said.
[0027]
In the electronic device according to the seventh aspect, the temperature sensor is prevented from coming off from the insertion portion, and the temperature detection at the predetermined position can be more reliably performed.
[0028]
An electronic device according to an eighth aspect is the electronic device according to the seventh aspect, wherein the retaining member is a member integrally formed with the exterior case.
[0029]
In the electronic device according to the eighth aspect, it is not necessary to increase the number of parts, and processing and assembly can be performed quickly and easily.
[0030]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of an electronic device according to the present invention will be described in detail with reference to the accompanying drawings.
(First embodiment)
FIG. 1 is an exploded perspective view of a digital camera 10 to which an electronic apparatus according to the present invention is applied. The digital camera 10 includes a battery case 12, a circuit board 14, and a cabinet 16. A battery 30 is housed in the battery case 12.
[0031]
The circuit board 14 includes an electronic circuit 40, and the temperature sensor 18 is connected to the electronic circuit 40. As shown in FIG. 2, the temperature sensor 18 is configured by mounting a thermistor 18b and a conductor 18c for detecting temperature on a flexible printed circuit board (hereinafter referred to as FPC) 18a having flexibility, and the thermistor 18b. Is connected to the electronic circuit 40 via a conductor 18c.
[0032]
When the temperature detected by the temperature sensor 18 exceeds a predetermined value, the electronic circuit 40 determines that the temperature is abnormal and controls to cut off the current.
[0033]
The cabinet 16 is divided into a front cabinet 16a and a rear cabinet 16b, and constitutes a casing of the digital camera 10 when assembled. As shown in FIGS. 1 and 3, ribs 20 are integrally formed on the rear cabinet 16b.
[0034]
The rib 20 includes a vertical rib 22 and a horizontal rib 24, and when the digital camera 10 is assembled, the vertical rib 22 presses the temperature sensor 18 to be in a predetermined position of the battery case 12. The lateral rib 24 has a concave shape, prevents positional displacement across the temperature sensor 18, and the end 24a contacts the battery case 12 to protect the temperature sensor 18 from external force (FIGS. 3 and 4). FIG. 5 and FIG. 6).
[0035]
The digital camera 10 includes an LCD 50, a lens unit 60, a shutter button 70, a cursor key 72, a button 74, and the like provided on the circuit board 14, in addition to the above-described components. Etc. are performed.
[0036]
FIG. 3 is a perspective view showing assembly of the digital camera 10. As shown in FIG. 3 (A), when the battery case 12, the circuit board 14, and the lens unit 60 are attached to the front cabinet 16a and the rear cabinet 16b is combined with this, the temperature as shown in FIG. The sensor 18 is pressed by the rib 20 and positioned at a predetermined position of the battery case 12. A cross section of the digital camera 10 when assembled is shown in FIG. Moreover, the state which looked at the assembled digital camera 10 from the rear cabinet 16b direction is shown in FIG.
[0037]
When measuring the temperature of the battery case 12, the temperature sensor 18 does not need to be in close contact with the battery case 12, and may be within a distance where the temperature can be measured. The rib 20 is configured to press the sensor 18 so as to be within a predetermined distance (for example, 0.5 mm or less) from the battery case 12.
[0038]
In this way, the digital camera 10 can detect the temperature at a predetermined position of the battery case 12, and can control the current interruption based on the result.
[0039]
Further, in the digital camera 10, since the temperature sensor 18 is positioned by assembling, parts such as a part for fixing the temperature sensor 18 and steps such as insertion and adhesion are not necessary. That is, assembly can be performed quickly and easily.
[0040]
Further, when the digital camera 10 is assembled, the lateral rib 24 prevents the temperature sensor 18 from being displaced, and the end 24a of the lateral rib 24 comes into contact with the battery case 12 to protect the temperature sensor 18 from external force. (See FIGS. 4, 5 and 6).
[0041]
In the present embodiment, the case where the electronic device is the digital camera 10 is described, but the application of the electronic device according to the present invention is not limited to the digital camera. The present invention can be applied to various electronic devices such as a silver halide photographic camera, a video camera, a mobile phone, and a personal information terminal (PDA) in addition to a digital camera.
[0042]
In this embodiment, the case where two cylindrical batteries 30 are used is described. However, in the electronic device according to the present invention, the shape and number of the batteries are not limited to those shown in this embodiment. Similarly, a battery case can also be made into various shapes according to the shape and number of the batteries accommodated.
(Second embodiment)
FIG. 8 is an exploded perspective view of a digital camera 10 ′ to which the electronic apparatus according to the present invention is applied. The digital camera 10 ′ includes a battery case 12 ′, a circuit board 14 ′, and a cabinet 16 ′.
[0043]
The battery case 12 ′ is provided with a tubular insertion portion 12′a at a predetermined position, that is, a temperature measurement position. In addition, battery 30 'is accommodated in battery case 12'.
[0044]
The circuit board 14 ′ is provided with an electronic circuit 40 ′, and a temperature sensor 18 ′ is connected to the electronic circuit 40 ′. The temperature sensor 18 ′ is inserted into the insertion portion 12′a. As shown in FIGS. 8 and 9, the inside of the insertion portion 12′a is tapered toward the battery side to stop the inserted temperature sensor 18 ′ and make it difficult to remove. The configuration of the temperature sensor 18 ′ is the same as that of the temperature sensor 18 (see FIG. 2) in the first embodiment.
[0045]
When the temperature detected by the temperature sensor 18 ′ exceeds a predetermined value, the electronic circuit 40 ′ determines that it is abnormal and performs control to cut off the current.
[0046]
The cabinet 16 ′ is divided into a front cabinet 16′a and a rear cabinet 16′b. When assembled, the cabinet 16 ′ constitutes a casing of the digital camera 10 ′. As shown in FIGS. 7 and 9, a rib 20 'is integrally formed with the rear cabinet 16'b.
[0047]
The rib 20 ′ is composed of a vertical rib 22 ′ and a horizontal rib 24 ′. When the digital camera 10 ′ is assembled, the vertical rib 22 ′ presses the temperature sensor 18 ′ so that it does not come out of the insertion portion 12′a. To. The lateral ribs 24 'have a concave shape, and when assembled, straddle the temperature sensor 18'.
[0048]
The digital camera 10 ′ includes an LCD 50 ′, a lens unit 60 ′, a shutter button 70 ′, a cursor key 72 ′, a button 74 ′ and the like provided on the circuit board 14 ′ in addition to the above-described components. Processing such as shooting and display of the shot image is performed.
[0049]
FIG. 8 is a cross-sectional view showing the assembly of the digital camera 10 ′. As shown in FIG. 8A, the battery case 12 ′, the circuit board 14 ′, and the lens unit 60 ′ are mounted on the front cabinet 16′a, and the temperature sensor 18 ′ is inserted into the insertion portion 12′a. As a result, the temperature sensor 18 'is positioned at a predetermined position, and displacement is prevented.
[0050]
When the rear cabinet 16′b is put together in this state, as shown in FIG. 8B, the temperature sensor 18 ′ is pressed by the rib 20 ′ to prevent the insertion portion 12′a from coming off, and the positional deviation is caused. Is further prevented.
[0051]
In this manner, the temperature sensor 18 ′ is positioned at a predetermined position by the insertion portion 12′a and the rib 20 ′, and is prevented from coming off. Therefore, in the digital camera 10 ′, temperature detection can be reliably performed at a predetermined position of the battery case 12 ′, and current interruption can be controlled based on this result.
[0052]
Further, in the digital camera 10 ′, the temperature sensor 18 ′ is positioned by inserting the temperature sensor 18 ′ into the insertion portion 12′a, and therefore, a part for fixing the temperature sensor 18 ′, a process such as adhesion, and the like are not necessary. is there. That is, assembly can be performed quickly and easily.
[0053]
Further, in the digital camera 10 ′, the temperature sensor 18 ′ is protected from external force by the insertion portion 12′a (see FIGS. 8 and 9).
[0054]
In the present embodiment, the case where the electronic device is the digital camera 10 ′ is described. However, the application of the electronic device according to the present invention is not limited to the digital camera. The present invention can be applied to various electronic devices such as a silver halide photographic camera, a video camera, a mobile phone, and a personal information terminal (PDA) in addition to a digital camera.
[0055]
In this embodiment, the case where two cylindrical batteries 30 ′ are used is described. However, in the electronic device according to the present invention, the shape and number of the batteries are not limited to those shown in this embodiment. . Similarly, a battery case can also be made into various shapes according to the shape and number of the batteries accommodated.
[0056]
【The invention's effect】
As described above, in the electronic apparatus according to the present invention, the temperature at a predetermined position can be detected and the assembly can be performed quickly and easily.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a digital camera according to an embodiment of the present invention.
FIG. 2 is a diagram showing a circuit board and a temperature sensor according to one embodiment of the present invention.
FIG. 3 is a perspective view showing pressing of a temperature sensor by a rib according to one embodiment of the present invention.
FIG. 4 is a cross-sectional view showing pressing of a temperature sensor by a rib according to one embodiment of the present invention.
FIG. 5 is a perspective view showing an assembled state of the digital camera according to one embodiment of the present invention.
FIG. 6 is a diagram showing a shape of a rib according to one embodiment of the present invention.
FIG. 7 is an exploded perspective view of a digital camera according to another embodiment of the present invention.
FIG. 8 is a diagram illustrating positioning and retaining of a temperature sensor according to another embodiment of the present invention.
FIG. 9 is an enlarged view showing positioning and retaining of the temperature sensor according to another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10,10 '... Digital camera, 12, 12' ... Battery case, 12'a ... Insertion part, 14, 14 '... Circuit board, 16, 16 ... Cabinet, 16a, 16 'a ... front cabinet, 16b, 16'b ... rear cabinet, 18, 18' ... temperature sensor, 18a ... FPC, 18b ... thermistor, 18c ... conductor, 20, 20 '... Rib, 22, 22' ... Vertical rib, 24, 24 '... Horizontal rib, 24a ... End

Claims (8)

In an electronic device having a battery case into which a battery is inserted, a circuit board, and an outer case for housing the battery case and the circuit board,
A temperature sensor for detecting the temperature of the battery case, wherein the flexible wiring part is attached so as to extend from an end part of the circuit board, and a sensor part provided at the tip of the wiring part A temperature sensor comprising:
A positioning member for the temperature sensor provided in the outer case, wherein the temperature sensor is pressed when the circuit board and the battery case to which the temperature sensor is attached are housed in the outer case, and the temperature sensor A positioning member for positioning the sensor portion at a predetermined temperature detection portion of the battery case;
An electronic device characterized by comprising: The electronic device according to claim 1, wherein the positioning member is a member integrally formed with the exterior case. The said positioning member has a recessed part straddling the wiring part of the said temperature sensor, The position of the direction orthogonal to the longitudinal direction of a temperature sensor is controlled by this recessed part, The Claim 1 or Claim 2 characterized by the above-mentioned. Electronics. The electronic device according to claim 3, wherein the concave portion of the positioning member is in contact with the battery case so that an external force applied to the exterior case is not applied to the temperature sensor. In an electronic device having a battery case into which a battery is inserted, a circuit board, and an outer case for housing the battery case and the circuit board,
A temperature sensor for detecting the temperature of the battery case, wherein the flexible wiring part is attached so as to extend from an end part of the circuit board, and a sensor part provided at the tip of the wiring part A temperature sensor comprising:
A tubular insertion portion provided at a predetermined temperature detection portion of the battery case, into which the temperature sensor is inserted;
An electronic device characterized by comprising: The said insertion part has a hole part and the protrusion part formed by protruding the edge of a hole part, The said temperature sensor is protected from external force by this protrusion part, It is characterized by the above-mentioned. Electronics. The exterior case further includes a retaining member for the temperature sensor, and the retaining member accommodates a circuit board to which the temperature sensor is attached and a battery case in which the temperature sensor is inserted in the insertion portion. The electronic device according to claim 5 or 6, wherein when the temperature sensor is pressed, the temperature sensor is pressed to prevent the temperature sensor from coming off from the insertion portion. The electronic apparatus according to claim 7, wherein the retaining member is a member integrally formed with the exterior case.

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