Motor lock

Abstract

To provide a motor lock having a simple structure, improved durability, compact size, and capable of increasing a linear motion speed.SOLUTION: A motor lock includes a motor 12, a cam member 17 that is driven by the motor 12 for rotation a deadbolt 18 that is arranged coaxially with the cam member 17 for axial movement, and a compression coil spring 19 that urges the deadbolt 18 in a direction to abut against the cam member 17, in which a cam surface portion 25 is provided on an end face of the cam member 17, and the deadbolt 18 is provided with a cam surface portion 29 that can abut against to fit in the cam surface portion 25.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to a motor lock that converts the rotational motion of a motor into linear motion to perform locking and unlocking.

Background Art

[0002] Conventionally, various types of such motor locks have been proposed.

[0003] For example, Patent Document 1 discloses a locking device that converts the rotational motion of a motor into linear motion using a feed screw mechanism and linearly reciprocates a second shaft member.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in this locking device, since a feed screw mechanism is used, the structure is complex and there are problems with durability, and moreover, the linear motion speed is slow.

[0006] The present invention has been made based on the above circumstances, and an object thereof is to provide a motor lock that has a simple structure, can improve durability and be made compact, and can increase the linear motion speed.

Means for Solving the Problems

[0007] In order to solve the above problems, the motor lock according to the present invention includes a motor, an intermediate member that is rotationally driven by this motor, a dead bolt provided coaxially with this intermediate member so as to be axially movable, and biasing means for biasing this dead bolt in a direction to abut against the intermediate member, and a cam surface portion is provided on one end surface of the intermediate member and the dead bolt, and a contact portion that contacts the cam surface portion is provided on the other of the intermediate member and the dead bolt.

Effect of the Invention

[0008] According to the motor lock of the present invention, the structure is simple, durability can be improved and the size can be made compact, and moreover, the linear movement speed can be increased.

Brief Description of the Drawings

[0009] The drawings show specific embodiments of the present invention according to the present disclosure, including not only essential configurations of the invention but also optional and preferred embodiments.

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Mode for Carrying Out the Invention

[0010] <First Embodiment> Hereinafter, the first embodiment of the present invention will be described with reference to the drawings.

[0011] In FIG. 1, reference numeral 1 indicates a box using the motor lock 2 according to the first embodiment of the present invention.

[0012] This box 1 includes, for example, a container 3 open at the top, a lid 4 that covers the open portion of the container 3 in an openable and closable manner, and a patch lock 5 for locking the lid 4 to the container 3.

[0013] As shown also in FIGS. 2 and 3, the patch lock 5 includes a fixing fitting 6 fixed to the container 3, an operating fitting 8 rotatably attached to the fixing fitting 6 via a pivot shaft 7, a hook fitting 10 rotatably attached to the operating fitting 8 via a pivot shaft 9, and a receiving fitting 11 fixed to the lid 4 and receiving the hook fitting 10.

[0014] As shown in FIGS. 4 and 5, the fixing fitting 6 incorporates a motor lock 2.

[0015] As shown in FIG. 6, this motor lock 2 includes a motor 12, a lock case 13 that houses the motor 12 and the like, a battery case 15 that houses a battery 14 for driving the motor 12, and a control board 16 that controls the driving of the motor 12. The lock case 13 is attached to the operating fitting 8, and the battery case 15 and the control board 16 are attached to the fixing fitting 6.

[0016] As shown in FIG. 7, inside the lock case 13, in addition to the motor 12, a cam member (intermediate member) 17, a dead bolt 18, and a compression coil spring (biasing means) 19 are arranged.

[0017] The cam member 17 is configured to be rotationally driven by the motor 12.

[0018] That is, a driving side gear (power transmission means) 21 is attached to the rotating shaft 20 of the motor 12.

[0019] Also, the rotating shaft 22 of the cam member 17 is arranged parallel to the rotating shaft 20 of the motor 12, and a driven side gear (power transmission means) 23 that meshes with the driving side gear 21 is attached to this rotating shaft 22.

[0020] Note that a bearing portion 51 of the rotating shaft 22 is formed in the lock case 13.

[0021] The dead bolt 18 performs locking and unlocking of the operating fitting 8, and is provided so as to be axially movable coaxially with the cam member 17. It has a configuration in which it engages with an engagement hole 24 formed in the fixing fitting 6 by protruding from the lock case 13 in the locked state, and releases the engagement with the engagement hole 24 by retracting into the lock case 13 in the unlocked state.

[0022] This dead bolt 18 is biased in a direction to abut against the cam member 17 by the compression coil spring 19.

[0023] As shown in FIG. 8, the cam member 17 has two pairs of mountain-shaped cam surface portions 25 formed by a part of a cylindrical shape on the side facing the dead bolt 18.

[0024] And, at the tip of each cam surface portion 25, a flat top portion 26 is provided.

[0025] Also, between the two pairs of cam surface portions 25, a flat valley portion 27 is provided.

[0026] Furthermore, between the top portion 26 and the valley portion 27 is an inclined surface portion 28.

[0027] On the other hand, as also shown in FIG. 9, the dead bolt 18 has, on the side facing the cam member 17, two pairs of mountain-shaped cam surface portions (contact portions) 29 formed of a part of a cylindrical shape, and the cam surface portions 29 of the dead bolt 18 and the cam surface portions 25 of the cam member 17 are shaped to fit corresponding to each other.

[0028] That is, at the tip of each cam surface portion 29, a flat top portion 30 is provided.

[0029] Also, between the two pairs of cam surface portions 29, a flat valley portion 31 is provided.

[0030] Furthermore, between the top portion 30 and the valley portion 31 is an inclined surface portion 32.

[0031] And the top portion 26 of the cam surface portion 25 can be fitted into the valley portion 31 between the cam surface portions 29, and the top portion 30 of the cam surface portion 29 can be fitted into the valley portion 27 between the cam surface portions 25, respectively.

[0032] The dead bolt 18 is configured to be movable in the axial direction but not rotatable around the axis, and when the cam member 17 rotates, the cam surface portions 25 of the cam member 17 slide and rotate with respect to the cam surface portions 29 of the dead bolt 18. As shown in FIG. 10, when the top portion 26 of the cam surface portion 25 of the cam member 17 abuts against the valley portion 31 of the cam surface portion 29 of the dead bolt, the dead bolt 18 is in the unlocked state, and as shown in FIG. 11, when the top portion 26 of the cam surface portion 25 of the cam member 17 abuts against the top portion 30 of the cam surface portion 29 of the dead bolt, the dead bolt 18 is in the locked state.

[0033] Note that the dead bolt 18 has a cylindrical portion 52 that protrudes from and retracts into the lock case 13, and a rectangular portion 53 that restricts the rotation of the cylindrical portion 52, and the cam surface portion 29 is provided on the side opposite to the cylindrical portion 52 of the rectangular portion 53.

[0034] On the other hand, the lock case 13 is formed with a round hole 54 through which the cylindrical portion 52 is slidably inserted and protrudes and retracts, and a guide portion 55 through which the rectangular portion 53 is slidably guided.

[0035] Furthermore, as shown in FIGS. 7 to 9, a cylindrical shaft 61 is provided between the cam member 17 and the dead bolt 18 so as to be coaxial with the cam member 17 and the dead bolt 18. That is, a first hole 62 into which one end side of the shaft 61 is rotatably and axially slidably fitted is formed on the dead bolt 18 side of the cam member 17, and a second hole 63 into which the other end side of the shaft 61 is rotatably and slidably fitted is formed on the cam member 17 side of the dead bolt 18. And the shaft 61 is configured to prevent axial misalignment between the cam member 17 and the dead bolt 18.

[0036] According to the above configuration, by rotationally controlling the motor 12 by 90° each time, the dead bolt 18 repeats protrusion and retraction due to the contact between the cam surface portion 25 of the cam member 17 and the cam surface portion 29 of the dead bolt 18. Therefore, the structure is simple, durability can be improved, and the size can be reduced. Moreover, the linear motion speed can be increased.

[0037] Also, in the protruding state of the dead bolt 18, since the flat top portion 26 of the cam surface portion 25 of the cam member 17 contacts the flat top portion 30 of the cam surface portion 29 of the dead bolt 18, the dead bolt 18 can be reliably maintained in the protruding state.

[0038] <Second Embodiment> Hereinafter, a second embodiment of the present invention will be described with reference to the drawings.

[0039] In the above-described first embodiment, the inclined surfaces 28 (32) are provided on both sides of the cam surface portion 25 (the cam surface portion 29 of the dead bolt 18) of the cam member 17. However, in the present second embodiment, as shown in FIGS. 12 to 14, the inclined surface 28 (32) is provided only on one side of the cam surface portion 25 (29).

[0040] That is, on the side opposite to the inclined surface 28 (32) of the cam surface portion 25 (29), a stepped surface 56 (57) along the axial direction is formed between the top portion 26 (30) and the valley portion 27 (31).

[0041] As a result, when the dead bolt 18 is locked, it gradually moves from the retracted state shown in FIG. 15 to the protruding state shown in FIG. 16 as the motor 12 rotates. However, when the dead bolt 18 is unlocked, it instantaneously moves from the protruding state shown in FIG. 16 to the retracted state shown in FIG. 15 by the biasing force of the compression coil spring 19 immediately after the motor 12 rotates.

[0042] Therefore, locking can be performed slowly and unlocking can be performed quickly.

[0043] <Third Embodiment> Hereinafter, a third embodiment of the present invention will be described with reference to the drawings.

[0044] In the above-described first embodiment, the rotation axis 20 of the motor 12 and the rotation axis 22 of the cam member (intermediate member) 17 are provided in parallel. However, in the present third embodiment, as shown in FIGS. 17 and 18, the rotation axis 20 of the motor 12 and the rotation axis 22 of the cam member (intermediate member) 17 are provided on the same axis.

[0045] According to such a configuration, the drive-side gear 21 and the driven-side gear 23, which are power transmission means, can be omitted, and further compactification can be achieved.

[0046] In the above-described first to third embodiments, the cam member (intermediate member) 17 is provided with the cam surface portion 25 and the dead bolt 18 is provided with the cam surface portion 29. However, the present invention is not limited to this, and a cam surface portion may be provided on either the cam member (intermediate member) 17 or the dead bolt 18, and the other may be provided with a protrusion (contact portion) that contacts the cam surface portion or the like.

[0047] In the above-described first to third embodiments, the shaft 61 is provided. However, the present invention does not necessarily require the provision of the shaft. In short, it goes without saying that any structure that can smoothly rotate the cam member 17 by means of the bearing portion 51 or the like is acceptable.

[0048] The disclosure of the present invention described above can be summarized at least in the following matters.

[0049] That is, the motor lock according to the present invention includes a motor, an intermediate member that is rotationally driven by this motor, a dead bolt that is provided coaxially with this intermediate member so as to be axially movable, and a biasing means that biases this dead bolt in a direction to contact the intermediate member. A cam surface portion is provided on one end surface of the intermediate member and the dead bolt, and a contact portion that contacts the cam surface portion is provided on the other of the intermediate member and the dead bolt.

[0050] The above invention can include at least the following embodiments. These embodiments can be adopted separately or in combination with each other.

[0051] (1) The rotation axis of the motor and the rotation axis of the intermediate member are provided in parallel.

[0052] (2) Power transmission means is provided between the motor and the intermediate member.

[0053] (3) The contact portion is configured in a shape corresponding to the cam surface portion.

[0054] A shaft is provided coaxially between the intermediate member and the dead bolt. A first hole is provided on the dead bolt side of the intermediate member, into which one end side of the shaft is fitted rotatably and slidably in the axial direction. A second hole is provided on the intermediate member side of the dead bolt, into which the other end side of the shaft is fitted rotatably and slidably in the axial direction.

Explanation of Signs

[0055] 2 Motor lock 12 Motor 17 Intermediate member (cam member) 18 Dead bolt 19 Biasing means (compression coil spring) 20 Rotating shaft 21 Power transmission means (drive side gear) 22 Rotating shaft 23 Power transmission means (driven side gear) 25 Cam surface portion 29 Contact portion (cam surface portion) 61 Shaft 62 First hole 63 Second hole

Claims

1. A motor, an intermediate member that is rotationally driven by the motor, a dead bolt provided coaxially with the intermediate member and movable axially, biasing means for biasing the dead bolt in a direction to abut against the intermediate member, comprising, a cam surface portion is provided on one end face of the intermediate member and the dead bolt, a contact portion that contacts the cam surface portion is provided on the other of the intermediate member and the dead bolt, A motor lock characterized by this.

2. The motor lock according to claim 1, wherein the rotation axis of the motor and the rotation axis of the intermediate member are provided in parallel.

3. The motor lock according to claim 1, wherein power transmission means is provided between the motor and the intermediate member.

4. The motor lock according to claim 1, wherein the contact portion is configured in a shape corresponding to the cam surface portion.

5. A shaft is provided coaxially between the intermediate member and the dead bolt, a first hole is provided on the dead bolt side of the intermediate member into which one end side of the shaft is rotatably and axially slidably fitted, The motor lock according to claim 1, wherein a second hole is provided on the intermediate member side of the dead bolt into which the other end side of the shaft is rotatably and axially slidably fitted.

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