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 a 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 a 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. Moreover, there is a problem that the linear motion speed is also 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] To solve the above problems, the motor lock according to the present invention comprises a motor, an intermediate member rotationally driven by the motor, a deadbolt mounted coaxially with the intermediate member so as to be movable in the axial direction, and a biasing means for biasing the deadbolt in a direction toward contact with the intermediate member, wherein a cam surface is provided on one end face of the intermediate member and the deadbolt, and a contact portion is provided on the other end face of the intermediate member and the deadbolt that contacts the cam surface. A shaft is provided coaxially between the intermediate member and the deadbolt. The deadbolt side of the intermediate member has a first hole into which one end of the shaft is rotatably and axially slidably fitted, and the intermediate member side of the deadbolt has a second hole into which the other end of the shaft is rotatably and axially slidably fitted. It is characterized by the following. [Effects of the Invention]

[0008] According to the motor lock of the present invention, the structure is simple, durability is improved, and it can be made more compact, and moreover, the linear motion speed can be increased. [Brief explanation of the drawing]

[0009] The drawings illustrate specific embodiments of the present invention relating to this disclosure, including not only essential components of the invention but also optional and preferred embodiments. [Figure 1] A perspective view showing a box using a motor lock according to the first embodiment of the present invention. [Figure 2] A perspective view showing the snap lock used in the box. [Figure 3] A perspective view showing the latch in an unlocked state. [Figure 4] A front view showing the motor lock built into the snap lock. [Figure 5] A side view showing the motor lock built into the snap lock. [Figure 6] A perspective view showing the snap-lock mechanism disassembled. [Figure 7] A perspective view showing the motor lock disassembled. [Figure 8] A perspective view showing the cam component of the motor lock. [Figure 9] A perspective view showing the deadbolt of the motor lock. [Figure 10] An internal front view showing the unlocked state of the motor lock. [Figure 11] An internal front view showing the locked state of the motor lock. [Figure 12] Perspective view showing the motor lock according to the second embodiment of the present invention disassembled. [Figure 13] Perspective view showing the cam member of the motor lock. [Figure 14] Perspective view showing the dead bolt of the motor lock. [Figure 15] Internal front view showing the unlocked state of the motor lock. [Figure 16] Internal front view showing the locked state of the motor lock. [Figure 17] Internal rear view showing the motor lock according to the third embodiment of the present invention. [Figure 18] Internal side view showing the motor lock.

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, an upwardly open container 3, a lid 4 that can open and close the open portion of the container 3, 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 for receiving the hook fitting 10.

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

[0015] As shown in Figure 6, this motor lock 2 comprises 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 operation 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 Figure 7, in addition to the motor 12, the lock case 13 also contains a cam member (intermediate member) 17, a deadbolt 18, and a compression coil spring (biasing means) 19.

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

[0018] In other words, a drive-side gear (power transmission means) 21 is attached to the rotating shaft 20 of the motor 12.

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

[0020] Furthermore, the lock case 13 has a bearing portion 51 for the rotating shaft 22.

[0021] The deadbolt 18 locks and unlocks the operating fitting 8. It is provided to be axially movable coaxially with the cam member 17 and is configured to exhibit a locked state in which it protrudes from the lock case 13 and engages with the engagement hole 24 formed in the fixing fitting 6, and an unlocked state in which it retracts into the lock case 13 and disengages from the engagement hole 24.

[0022] This deadbolt 18 is biased by a compression coil spring 19 in a direction that brings it into contact with the cam member 17.

[0023] As shown in Figure 8, the cam member 17 has two pairs of mountain-shaped cam surfaces 25, each composed of a cylindrical portion, on the side facing the deadbolt 18.

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

[0025] Furthermore, a flat valley 27 is provided between the two pairs of cam surfaces 25.

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

[0027] On the other hand, as shown in Figure 9, the deadbolt 18 has two pairs of mountain-shaped cam surfaces (contact portions) 29, which are made up of a cylindrical part, on the side facing the cam member 17, and these cam surfaces 29 and the cam surface 25 of the cam member 17 are shaped to fit together in a corresponding manner.

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

[0029] Furthermore, a flat valley 31 is provided between the two pairs of cam surfaces 29.

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

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

[0032] The deadbolt 18 is designed to move axially but not rotate around its axis. When the cam member 17 rotates, the cam surface 25 of the cam member 17 slides and rotates relative to the cam surface 29 of the deadbolt 18. As shown in Figure 10, the deadbolt 18 is unlocked when the top 26 of the cam surface 25 of the cam member 17 contacts the valley 31 of the cam surface 29 of the deadbolt. As shown in Figure 11, the deadbolt 18 is locked when the top 26 of the cam surface 25 of the cam member 17 contacts the top 30 of the cam surface 29 of the deadbolt.

[0033] The deadbolt 18 has a cylindrical portion 52 that protrudes from 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 of the rectangular portion 53 opposite to the cylindrical portion 52.

[0034] On the other hand, the lock case 13 has a round hole 54 through which the cylindrical portion 52 slides in and out, and a guide portion 55 through which the rectangular portion 53 is slidably guided.

[0035] Furthermore, as shown in Figures 7 to 9, a cylindrical shaft 61 is provided between the cam member 17 and the deadbolt 18 so as to be coaxial with the cam member 17 and the deadbolt 18. Specifically, a first hole 62 is formed on the deadbolt 18 side of the cam member 17 into which one end of the shaft 61 is rotatably and axially slidably fitted, and a second hole 63 is formed on the cam member 17 side of the deadbolt 18 into which the other end of the shaft 61 is rotatably and slidably fitted. Furthermore, this shaft 61 prevents the cam member 17 and the deadbolt 18 from wobbling.

[0036] With the above configuration, by controlling the rotation of the motor 12 by 90° increments, the deadbolt 18 repeatedly protrudes and retracts due to contact between the cam surface 25 of the cam member 17 and the cam surface 29 of the deadbolt 18. This results in a simple structure, improved durability, and compactness, while also enabling a faster linear motion speed.

[0037] Furthermore, when the deadbolt 18 is in the protruding state, the flat top 26 of the cam surface 25 of the cam member 17 and the flat top 30 of the cam surface 29 of the deadbolt 18 come into contact, thus ensuring that the deadbolt 18 is reliably maintained in the protruding state.

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

[0039] In the first embodiment described above, inclined surfaces 28(32) were provided on both sides of the cam surface 25 of the cam member 17 (cam surface 29 of the deadbolt 18). However, in this second embodiment, as shown in Figures 12 to 14, the inclined surface 28(32) is provided on only one side of the cam surface 25(29).

[0040] In other words, the side of the cam surface 25(29) opposite the inclined surface 28(32) is a stepped surface 56(57) that runs axially between the top 26(30) and the valley 27(31).

[0041] As a result, when locked, the deadbolt 18 gradually moves from the retracted state shown in Figure 15 to the protruding state shown in Figure 16 as the motor 12 rotates, but when unlocked, immediately after the motor 12 rotates, the biasing force of the compression coil spring 19 causes it to instantly move from the protruding state shown in Figure 16 to the retracted state shown in Figure 15.

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

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

[0044] In the first embodiment described above, the rotation shaft 20 of the motor 12 and the rotation shaft 22 of the cam member (intermediate member) 17 were arranged in parallel. However, in this third embodiment, as shown in Figures 17 and 18, the rotation shaft 20 of the motor 12 and the rotation shaft 22 of the cam member (intermediate member) 17 are arranged on the same axis.

[0045] With this configuration, the drive-side gear 21 and driven-side gear 23, which are power transmission means, can be omitted, allowing for further miniaturization.

[0046] In the first to third embodiments described above, a cam surface portion 25 is provided on the cam member (intermediate member) 17 and a cam surface portion 29 is provided on the deadbolt 18. 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 deadbolt 18, while the other is a projection (contact portion) that contacts the cam surface portion.

[0047] In the first to third embodiments described above, a shaft 61 was provided, but in the present invention, it is not necessarily required to provide one. In short, any structure that allows the cam member 17 to rotate smoothly by a bearing portion 51 or the like is sufficient.

[0048] The disclosure relating to the present invention described above can be summarized to at least the following:

[0049] In other words, the motor lock according to the present invention comprises a motor, an intermediate member rotationally driven by the motor, a deadbolt mounted coaxially with the intermediate member so as to be axially movable, and a biasing means for biasing the deadbolt in a direction toward contact with the intermediate member, wherein a cam surface is provided on one end face of the intermediate member and the deadbolt, and a contact portion is provided on the other end face of the intermediate member and the deadbolt that contacts the cam surface.

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

[0051] (1) The motor's rotation axis and the intermediate member's rotation axis are set parallel to each other.

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

[0053] (3) The contact portion shall be configured to have a shape corresponding to the cam surface portion. [Explanation of symbols]

[0055] 2 Motor Lock 12 motors 17 Intermediate member (cam member) 18 Deadbolt 19. Biasing means (compression coil spring) 20 Rotation axis 21 Power transmission means (drive-side gear) 22 Rotation axis 23 Power transmission means (driven gear) 25 Cam surface 29 Contact part (cam surface part) 61 Shaft 62 Hole 1 63 Second hole

Claims

1. Motor and, An intermediate member that is rotationally driven by the motor, A deadbolt is provided coaxially with the intermediate member so as to be movable in the axial direction, A biasing means for biasing the deadbolt in a direction that brings it into contact with the intermediate member, It is equipped with, A cam surface is provided on one end face of the intermediate member and the dead bolt. The other of the intermediate member and the dead bolt is provided with a contact portion that contacts the cam surface, A shaft is provided coaxially between the intermediate member and the deadbolt. The deadbolt side of the intermediate member is provided with a first hole into which one end of the shaft is rotatably and axially slidably fitted. The intermediate member side of the deadbolt is provided with a second hole into which the other end of the shaft is rotatably and axially slidably inserted. A motor lock characterized by the following features.

2. The motor lock according to claim 1, characterized in that 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, characterized in that a power transmission means is provided between the motor and the intermediate member.

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

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