Electric lock

Abstract

To provide an electric lock capable of reducing the repairing cost when battery leakage occurs.SOLUTION: An electric lock 1 includes a drive mechanism that is powered by power supplied from a battery, a main body case 21 that houses the drive mechanism, and a battery box 5 that houses the battery and is detachably attached to the main body case 21. The battery box 5 has a first terminal 51 and a fifth terminal 55 that come into contact with the housed battery to conduct the battery power to the outside of the battery box 5. The main body case 21 has a first connection terminal 8 and a second connection terminal 9 that come into contact with the first terminal 51 or the fifth terminal 55 to supply the battery power to the drive mechanism, and the contact portions of the first connection terminal 8 and the second connection terminal 9 that come into contact with the first terminal 51 or the fifth terminal 55 are so provided on the main body case 21 as to be located above the battery.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to an electric lock.

Background Art

[0002] As an electric lock installed on a front door, there is known one in which a battery housing portion for housing a battery and an electric component housing portion for housing electric components such as a motor are provided side by side vertically in a main body case (see, for example, Patent Documents 1 to 3). In the electric lock described in Patent Document 1, in order to prevent intrusion of dew, rainwater, etc. from the battery housing portion into the electric component housing portion, the battery housing portion and the electric component housing portion are isolated and the electric component housing portion is formed in a liquid-tight manner. Further, in the electric lock described in Patent Document 2, a cartridge for housing a battery is screwed to the main body case. Further, in the electric lock described in Patent Document 3, in order to prevent the liquid leaked from the battery from adhering to the control circuit of the electric lock when liquid leakage occurs in the battery, a wall portion is formed between the battery and the control circuit.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] If liquid leakage of the battery occurs and the liquid leaked from the battery continues to adhere to the terminal, the liquid adhering to the terminal may stick or the terminal may rust due to the liquid, causing a malfunction of the electric lock. In that case, since it is difficult for the user to disassemble the electric lock and replace only the terminal, even if the adhesion of the liquid leaked from the battery is partial, it is necessary to replace the entire unit, resulting in high repair costs.

[0005] In view of the above circumstances, an object of the present invention is to provide an electric lock capable of reducing the cost required for repair when battery leakage occurs.

Means for Solving the Problems

[0006] The electric lock of the present invention includes a drive mechanism driven by electric power supplied from a battery, a main body case that houses the drive mechanism, and a battery box that houses the battery and is detachably attached to the main body case. The battery box has a battery box side terminal that contacts the housed battery and conducts the electric power of the battery to the outside of the battery box. The main body case has a main body case side terminal that contacts the battery box side terminal and supplies the electric power of the battery to the drive mechanism. The contact portion of the main body case side terminal that contacts the battery box side terminal is provided on the main body case above the battery.

Effects of the Invention

[0007] According to the present invention, since it is not necessary to replace the entire unit by simply replacing the battery box, the cost required for repair when battery leakage occurs can be reduced.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, the present invention will be described along with preferred embodiments. Note that the present invention is not limited to the embodiments shown below, and can be appropriately changed without departing from the gist of the present invention. Further, in the embodiments shown below, there are some places where the illustration and description of some configurations are omitted. For the details of the omitted technology, publicly known or well-known technologies are appropriately applied within the range where there is no contradiction with the content described below.

[0010] FIG. 1 is a front view showing an electric lock 1 according to an embodiment of the present invention. FIG. 2 is a side view showing the electric lock 1 of FIG. 1. The electric lock 1 shown in these figures is a battery-powered electric lock installed on the indoor side of the front door, and operates a locking device installed on the front door in response to an authentication operation at an outdoor operation unit (not shown) or a remote authentication operation via a smartphone or the like.

[0011] The electric lock 1 includes a housing 2 attached to the indoor side surface of the front door, a connecting shaft 3 (see FIG. 2) connected to a locking device disposed inside the front door, and a thumb turn 4 connected to the connecting shaft 3. The housing 2 includes a main body case 21, a battery cover 22, and a back cover 23.

[0012] The main body case 21 includes a battery accommodation portion 211, a drive mechanism accommodation portion 212, and a substrate accommodation portion 213 (see FIG. 2). The battery accommodation portion 211 and the drive mechanism accommodation portion 212 are arranged side by side vertically. In the present embodiment, the battery accommodation portion 211 is arranged on the upper side and the drive mechanism accommodation portion 212 is arranged on the lower side. The substrate accommodation portion 213 is arranged on the back side of the main body case 21.

[0013] The battery housing portion 211 is a recess formed on the front side and the upper side of the main body cover. A battery cover 22 is detachably attached to the main body case 21 so as to cover the battery housing portion 211. Further, the back side of the main body case 21 is open, and a back cover 23 is attached so as to close the opening on the back side of the main body case 21. A substrate housing portion 213 is partitioned by the main body cover 21 and the back cover 23.

[0014] The shaft portion 41 of the thumb turn 4 (see FIG. 3) and the connecting shaft 3 are inserted through the drive mechanism housing portion 212 and the substrate housing portion 213. The knob portion 42 of the thumb turn 4 protrudes from the front of the main body case 21 toward the indoor side, and the connecting shaft 3 protrudes from the back cover 23 toward the entrance door side.

[0015] FIG. 3 is a sectional view taken along line III-III of FIG. 1. As shown in this figure, the electric lock 1 includes a battery box 5 housed in the battery housing portion 211, a drive mechanism 6 housed in the drive mechanism housing portion 212, and a wiring board 7 housed in the substrate housing portion 213.

[0016] The battery box 5 is screwed to the back surface 214 of the main body case 21 in a state of being fitted into the battery housing portion 211 which is a recess, and is covered with the battery cover 22. This battery box 5 is a box-shaped cartridge that houses a plurality of batteries B (see FIG. 5 etc.) connected in series. In the present embodiment, four batteries B are arranged side by side in the battery box 5.

[0017] The drive mechanism housing portion 212 is a box-shaped portion provided below the battery housing portion 211 of the main body case 21. The front, upper and lower surfaces, and left and right surfaces of the drive mechanism housing portion 212 are constituted by the main body case 21, and the back surface of the drive mechanism housing portion 212 is constituted by the back cover 23. That is, the drive mechanism 6 is housed in a liquid-tight space partitioned by the drive mechanism housing portion 212.

[0018] The drive mechanism 6 includes a gear unit 61, a clutch 62, and a motor 63 (see Fig. 6 etc.). The gear unit 61 includes a plurality of gears 611 and a gear box 612. The plurality of gears 611 connect the gear 631 (see Fig. 7) provided on the output shaft of the motor 63 and the gear 31 provided on the connecting shaft 3. The clutch 62 is provided between the connecting shaft 3 and the gear 31, and connects / disconnects the connecting shaft 3 and the gear 31. This clutch 62 connects / disconnects the connecting shaft 3 and the gear 31 in order to switch the mounting angle of the connecting shaft 3 according to the left and right convenience of the front door when the electric lock 1 is installed on the front door.

[0019] Fig. 4 is an exploded perspective view showing a state in which the battery cover 22 and the rear cover 23 of the electric lock 1 in Figs. 1 to 3 are removed from the main body case 21. As shown in this figure, the battery box 5 includes a box main body 50, a first terminal 51, a second terminal 52, a third terminal 53, a fourth terminal 54, and a fifth terminal 55.

[0020] The box main body 50 is a box-shaped member having a recess for accommodating a plurality of batteries B arranged side by side left and right. A pair of screw insertion holes 50H are formed side by side vertically at the center in the left-right direction when viewed from the front side of the box main body 50, and the box main body 50 is screwed to the rear surface 214 of the main body case 21 by a pair of screws inserted through the pair of screw insertion holes 50H.

[0021] Terminal attachment portions 501, 503, 505 are provided at the upper part of the box main body 50, and terminal attachment portions 502, 504 are provided at the lower part of the box main body 50. The terminal attachment portion 501 is arranged at the upper right of the box main body 50 when viewed from the front side, and the first terminal 51 is attached thereto. The terminal attachment portion 505 is arranged at the upper left of the box main body 50 when viewed from the front side, and the fifth terminal 55 is attached thereto. The terminal attachment portion 503 is arranged above the center in the left-right direction of the box main body 50 when viewed from the front side, and the third terminal 53 is attached thereto. The terminal attachment portion 502 is arranged at the lower right when viewed from the front side, and the second terminal 52 is attached thereto. The terminal attachment portion 504 is arranged at the lower left when viewed from the front side, and the fourth terminal 54 is attached thereto.

[0022] The first terminal 51 is a spring contact having contact portions 511 and 512, and is attached to the terminal attachment portion 501 in a state where the terminal attachment portion 501 is sandwiched between the contact portion 511 and the contact portion 512. The contact portion 511 is provided upward on the upper surface of the terminal attachment portion 501, and the contact portion 512 is provided downward on the lower surface of the terminal attachment portion 501.

[0023] The second terminal 52 is a spring contact having contact portions 521 and 522, and is attached to the terminal attachment portion 502 in a state of being inserted into a slit formed in the terminal attachment portion 502. The contact portion 521 is arranged vertically below the contact portion 512 of the first terminal 51, and the contact portion 522 is arranged on the left side of the contact portion 521 when viewed from the front side.

[0024] The third terminal 53 is a spring contact having contact portions 531 and 532, and is attached to the terminal attachment portion 503 in a state of being inserted into a slit formed in the terminal attachment portion 503. The contact portion 531 is arranged vertically above the contact portion 522 of the second terminal 52, and the contact portion 532 is arranged on the left side of the contact portion 531 when viewed from the front side.

[0025] The fourth terminal 54 is a spring contact having contact portions 541 and 542, and is attached to the terminal attachment portion 504 in a state of being inserted into a slit formed in the terminal attachment portion 504. The contact portion 541 is arranged vertically below the contact portion 532 of the third terminal 53, and the contact portion 542 is arranged on the left side of the contact portion 541 when viewed from the front side.

[0026] The fifth terminal 55 is a spring contact having contact portions 551 and 552, and is attached to the terminal attachment portion 505 in a state where the terminal attachment portion 505 is sandwiched between the contact portion 551 and the contact portion 552. The contact portion 551 is provided upward on the upper surface of the terminal attachment portion 505, and the contact portion 552 is arranged downward on the lower surface of the terminal attachment portion 505. Further, the contact portion 552 is arranged vertically above the contact portion 542 of the fourth terminal 54.

[0027] Here, the electric lock 1 of the present embodiment includes a first connection terminal 8 and a second connection terminal 9. The first connection terminal 8 and the second connection terminal 9 are provided on the main body case 21 and are connected to the wiring board 7 via the harnesses H1, H2 and the connector C1. One end of each of the harnesses H1, H2 is connected to the connector C1.

[0028] On the upper part of the main body case 21, terminal attachment portions 215, 216 are provided. The terminal attachment portion 215 is arranged at the upper right of the main body case 21 when viewed from the front side, and the terminal attachment portion 216 is arranged at the upper left of the main body case 21 when viewed from the front side.

[0029] The first connection terminal 8 is a spring contact having a contact portion 81, a connection portion 82, and a pair of locking portions 83, and is attached in a state of being inserted from the back side into the terminal attachment portion 215. The contact portion 81 is provided so as to protrude downward from the terminal attachment portion 215, the connection portion 82 is provided so as to extend from the terminal attachment portion 215 to the back side, and the pair of locking portions 83 are provided so as to sandwich the connection portion 82 from left and right.

[0030] The contact portion 81 comes into contact with the contact portion 511 of the first terminal 51. Also, the other end of the harness H1 is connected to the connection portion 82 by welding. Further, the pair of locking portions 83 are inserted into and locked by a pair of locking holes 215H (see FIG. 8) provided in the terminal attachment portion 215.

[0031] The second connection terminal 9 is a spring contact having a contact portion 91, a connection portion 92, and a pair of locking portions 93, and is attached in a state of being inserted from the back side into the terminal attachment portion 216. The contact portion 91 is provided so as to protrude downward from the terminal attachment portion 216, the connection portion 92 is provided so as to extend from the terminal attachment portion 216 to the back side, and the pair of locking portions 93 are provided so as to sandwich the connection portion 92 from left and right.

[0032] The contact portion 91 comes into contact with the contact portion 551 of the fifth terminal 55. Also, the other end of the harness H2 is connected to the connection portion 92 by welding. Further, the pair of locking portions 93 are inserted into and locked by locking holes (not shown) provided in the terminal attachment portion 216.

[0033] The upper surface 212U of the drive mechanism housing portion 212 is a horizontal plane, and a concave portion 212C serving as a liquid reservoir is formed on the upper surface 212U. The concave portion 212C is formed by connecting the left and right sides and the central side of the upper surface 212U. The left and right sides of the concave portion 212C are formed directly below the left and right batteries B, and the central side of the concave portion 212C is formed so as to pass directly below the inner battery B.

[0034] FIG. 5 is a front view showing a state in which the battery cover 22 and the back cover 23 of the electric lock 1 in FIGS. 1 to 3 are removed from the main body case 21. As shown in this figure, in the battery box 5, the plus terminal of the rightmost battery B as viewed from the front side contacts the contact portion 512 of the first terminal 51. Also, the minus terminal of the rightmost battery B as viewed from the front side contacts the contact portion 521 of the second terminal 52. Further, the plus terminal of the second battery B from the right as viewed from the front side contacts the contact portion 522 of the second terminal 52. Also, the minus terminal of the second battery B from the right as viewed from the front side contacts the contact portion 531 of the third terminal 53. Further, the plus terminal of the third battery B from the right as viewed from the front side contacts the contact portion 532 of the third terminal 53. Also, the minus terminal of the third battery B from the right as viewed from the front side contacts the contact portion 541 of the fourth terminal 54. Further, the plus terminal of the leftmost battery B as viewed from the front side contacts the contact portion 542 of the fourth terminal 54. Also, the minus terminal of the leftmost battery B as viewed from the front side contacts the contact portion 552 of the fifth terminal 55.

[0035] Also, between the battery box 5 and the main body case 21, the contact portion 511 of the first terminal 51 arranged on the upper surface of the battery box 5 and the contact portion 81 of the first connection terminal 8 protruding downward from the upper part of the main body case 21 are in contact. Further, the contact portion 551 of the fifth terminal 55 arranged on the upper surface of the battery box 5 and the contact portion 91 of the second connection terminal 9 protruding downward from the upper part of the main body case 21 are in contact.

[0036] As a result, four batteries B are connected in series to the harnesses H1 and H2 via the first connection terminal 8, the first terminal 51, the second terminal 52, the third terminal 53, the fourth terminal 54, the fifth terminal 55, and the second connection terminal 9.

[0037] FIG. 6 is a rear view showing a state where the back cover 23 of the electric lock 1 in FIGS. 1 to 3 is removed from the main body case 21. As shown in this figure, the connector C1 to which the harnesses H1 and H2 are connected is mounted at the upper right position when viewed from the back side of the wiring board 7.

[0038] A connector C2 is mounted at the lower right position when viewed from the back side of the wiring board 7. One end of each of the wirings H3 and H4 is connected to this connector C2. The other ends of the wirings H3 and H4 are connected to the motor 63.

[0039] Power wirings, antennas, integrated circuits, etc. are formed or mounted on the wiring board 7. The antennas, integrated circuits, etc. operate with the power supplied from a plurality of serially connected batteries B via the harnesses H1, H2, etc. Further, the integrated circuit operates the motor 63 by supplying power to the motor 63 from a plurality of serially connected batteries B via the harnesses H1, H2, etc. in response to an authentication operation on the outdoor side.

[0040] FIG. 7 is a cross-sectional view taken along line VII-VII of FIG. 5. As shown in this figure, a motor 63, a gear unit 61, a connecting shaft 3, a shaft portion 41 (see FIG. 3) of the cam turn 4, and a clutch 62 (see FIG. 3) are provided below the battery B. As described above, a part of the motor 63, the gear unit 61, the shaft portion 41 of the cam turn 4, the clutch 62, and the connecting shaft 3 is housed in a liquid-tight space partitioned by the drive mechanism housing portion 212.

[0041] Here, the first terminal 51, the second terminal 52, the third terminal 53, the fourth terminal 54, and the fifth terminal 55 provided in the battery box 5 are in contact with the plus terminal or the minus terminal of the battery B, whereas the first connection terminal 8 and the second connection terminal 9 provided in the main body case 21 are non-contact with respect to the plus terminal and the minus terminal of the battery B.

[0042] FIG. 8 is a cross-sectional view showing an enlarged part A of FIG. 7. As shown in this figure, the first terminal 51 is composed of a thin plate for a spring bent in a two-fold manner, and includes a contact portion 511 and a contact portion 512 facing each other with a gap therebetween. The contact portion 511 is a flat plate-like portion, and the contact portion 512 includes a frustum-shaped portion at the center. The first terminal 51 is attached to the terminal attachment portion 501 in a state where the plate-like terminal attachment portion 501 is sandwiched between the contact portion 511 and the contact portion 512.

[0043] The contact portion 512 is disposed below the terminal attachment portion 501 and abuts against the plus terminal of the battery B. On the other hand, the contact portion 511 is disposed above the terminal attachment portion 501. That is, the contact portion 511 is disposed above the contact portion 512 with the terminal attachment portion 501 therebetween.

[0044] The first connection terminal 8 is composed of a thin plate for a spring bent in a V shape, and includes a contact portion 81 facing each other and a connection portion 82. A pair of locking portions 83 are provided on the connection portion 82. The contact portion 81 is an elastic piece that extends obliquely downward from the bent portion of the first connection terminal 8 to the back side, and abuts against the contact portion 511 of the first terminal 51. The tip of the contact portion 81 is bent obliquely upward. The connection portion 82 is a flat and elongated plate-like portion that extends from the bent portion of the first connection terminal 8 to the back side. The pair of locking portions 83 are provided so as to sandwich the connection portion 82 in its width direction. Each locking portion 83 is an elastic piece that extends obliquely downward from the connection portion 82 to the back side.

[0045] The terminal attachment portion 215 is disposed directly above the terminal attachment portion 501, and includes a slit 215S through which the contact portion 81 and the connection portion 82 are inserted, a pair of locking holes 215H provided with the slit 215S interposed therebetween in the left-right direction, and a front wall 215W. The contact portion 81 and the connection portion 82 are inserted into the slit 215S from the back side of the main body case 21, and each locking portion 83 is inserted into each locking hole 215H from the back side of the main body case 21. The front wall 215W faces the bent portion of the first connection terminal 8 in the front-rear direction and restricts the forward movement of the first connection terminal 8.

[0046] Further, a stepped portion 215T is formed at the bottom of each locking hole 215H. When the tip of the locking portion 83 locks to the stepped portion 215T, the movement of the first connection terminal 8 toward the back side is restricted.

[0047] Here, the first connection terminal 8 is disposed above the battery B and the first terminal 51, and the contact portion 511 with which the contact portion 81 abuts is vertically separated from the contact portion 512 with which the plus terminal of the battery B abuts. Further, the contact portion 511 and the contact portion 512 are separated by the terminal attachment portion 501. Therefore, when liquid leakage occurs in the battery B, the liquid leaked from the battery B does not adhere to the contact portion 81.

[0048] Although illustration is omitted, the second connection terminal 9, the terminal attachment portion 216, the fifth terminal 55, and the terminal attachment portion 505 have the same configuration as the first connection terminal 8, the terminal attachment portion 215, the first terminal 51, and the terminal attachment portion 501. Therefore, when liquid leakage occurs in the battery B, the liquid leaked from the battery B does not adhere to the contact portion 91 of the second connection terminal 9.

[0049] As described above, in the electric lock 1 according to the present embodiment, the battery box 5 that houses a plurality of batteries B is detachably attached to the main body case 21 that houses the drive mechanism 6 and the like, and the first terminal 51 and the fifth terminal 55 that contact the terminals of any one of the batteries B are provided on the battery box 5 above the battery B. On the other hand, the main body case 21 is provided with a first connection terminal 8 that contacts the first terminal 51 and a second connection terminal 9 that contacts the fifth terminal 55 so as to be located above the first terminal 51 and the fifth terminal 55.

[0050] Thereby, when liquid leakage occurs in the battery B, it is possible to prevent the liquid leaked from the battery B from adhering to the first connection terminal 8 and the second connection terminal 9 provided on the main body case 21. Therefore, when liquid leakage occurs in the battery B, since the replacement part caused by the liquid leaked from the battery B adhering to the terminal can be confined to the battery box 5, the replacement of the entire electric lock 1 becomes unnecessary, and the cost required for repairing the electric lock 1 can be reduced.

[0051] Further, the first terminal 51 includes a contact portion 512 that contacts the plus terminal of the battery B, and a contact portion 511 that is disposed above the contact portion 512 and contacts the first connection terminal 8. Thereby, when liquid leakage occurs in the battery B, it is possible to prevent the liquid leaked from the battery B from adhering to the contact portion 511. Therefore, when liquid leakage occurs in the battery B, it is possible to prevent the liquid leaked from the battery B from adhering to the first connection terminal 8.

[0052] Also, the fifth terminal 55 includes a contact portion 552 that contacts the minus terminal of the battery B, and a contact portion 551 that is disposed above the contact portion 552 and contacts the second connection terminal 9. Thereby, when liquid leakage occurs in the battery B, it is possible to prevent the liquid leaked from the battery B from adhering to the contact portion 551. Therefore, when liquid leakage occurs in the battery B, it is possible to prevent the liquid leaked from the battery B from adhering to the second connection terminal 9.

[0053] Further, the first connection terminal 8 includes a contact portion 81 that contacts the contact portion 511 of the first terminal 51, and a connection portion 82 that is connected to the wiring board 7. Since the contact portion 511 of the first terminal 51 that the contact portion 81 contacts is located above the contact portion 512 that contacts the plus terminal of the battery B, when liquid leakage occurs in the battery B, it is possible to prevent the liquid leaked from the battery B from adhering to the contact portion 81 of the first connection terminal 8.

[0054] Also, the second connection terminal 9 includes a contact portion 91 that contacts the contact portion 551 of the fifth terminal 55, and a connection portion 92 that is connected to the wiring board 7. Since the contact portion 551 of the fifth terminal 55 that the contact portion 91 contacts is located above the contact portion 552 that contacts the minus terminal of the battery B, when liquid leakage occurs in the battery B, it is possible to prevent the liquid leaked from the battery B from adhering to the contact portion 91 of the second connection terminal 9.

[0055] Further, the main body case 21 is disposed below the battery box 5 and includes a drive mechanism housing portion 212 that houses the drive mechanism 6. This drive mechanism housing portion 212 has a liquid-tight structure that prevents the intrusion of liquid. Therefore, when liquid leakage occurs in the battery B, it is possible to prevent the liquid leaked from the battery B from adhering to the drive mechanism 6.

[0056] In addition, the drive mechanism housing portion 212 has a horizontal upper surface 212U, and a recess 212C for accumulating liquid is formed in the upper surface 212U. Therefore, when liquid leakage occurs in the battery B, the liquid leaked from the battery B can be accumulated in the recess 212C, and dripping of the liquid from the main body case 21 can be suppressed.

[0057] Furthermore, in the electric lock 1 according to the present embodiment, the wiring board 7 connected to the drive mechanism 6, the first connection terminal 8, and the second connection terminal 9 is housed in the main body case 21 on the back side of the battery box 5. Thereby, when liquid leakage occurs in the battery B, it is possible to prevent the liquid leaked from the battery B from adhering to the wiring board 7.

[0058] As described above, the present invention has been described based on the above embodiments, but the present invention is not limited thereto, and modifications may be made or other technologies may be combined without departing from the spirit of the present invention.

[0059] For example, in the above embodiment, the present invention has been described by taking the electric lock 1 installed on the indoor side of the entrance door as an example, but the present invention can also be applied to an electric lock installed on the outdoor side of the entrance door. Further, the present invention is not limited to the entrance door and can also be applied to other doors.

[0060] Also, in the above embodiment, the drive mechanism housing portion 212 is provided below the battery box 5, but the drive mechanism housing portion 212 may be provided above the battery box 5. Further, the wiring board 7 may be housed in the drive mechanism housing portion 212.

Explanation of Reference Numerals

[0061] 1 Electric lock 5 Battery box 6 Drive mechanism 7 Wiring board 8 First connection terminal (main body case side terminal) 9 Second connection terminal (main body case side terminal) 21 Main body case 51 First terminal (battery box side terminal) 55 Fifth terminal (battery box side terminal) 212 Drive mechanism housing section 212C Recess 212U Upper surface B Battery

Claims

1. A drive mechanism driven by electric power supplied from a battery, a main body case that houses the drive mechanism, and a battery box that houses the battery and is detachably attached to the main body case. The battery box has a battery box side terminal that contacts the housed battery and conducts the power of the battery to the outside of the battery box. The main body case has a main body case side terminal that contacts the battery box side terminal and supplies the power of the battery to the drive mechanism. The main body case side terminal is an electric lock provided on the main body case above the battery, with the contact portion that contacts the battery box side terminal.

2. The electric lock according to claim 1, wherein the main body case includes a drive mechanism housing portion that is disposed below the battery box and houses the drive mechanism.

3. The electric lock according to claim 2, wherein the drive mechanism housing portion has a horizontal upper surface, and a recess for accumulating liquid is formed on the upper surface.

4. The electric lock according to claim 3, wherein the main body case includes a battery box housing portion to which the battery box is attached, and a part of the battery box housing portion is formed by the upper surface.

5. The electric lock according to claim 1 or 2, further comprising a wiring board that is housed in the main body case on the back side of the battery box and is connected to the drive mechanism and the battery box side terminal.

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