Anti-theft device

Abstract

To provide an anti-theft device that makes it difficult to remove a fish finder from a mount to prevent theft.SOLUTION: An anti-theft device 2 prevents the theft of a fish finder 1 attached to a mount 7 with a mounting screw 13, and includes: a base 15 that is fixed to the mount 7 together with the fish finder 1 with the mounting screw 13; a cover 20 that can be attached to the base 15 so as to cover the mounting screw 13; and a lock 22 for locking the cover 20 so that it cannot be removed from the base 15.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to an anti-theft device for preventing theft of equipment such as a fish finder mounted on a boat or ship. [Background technology]

[0002] Various types of anti-theft devices of this kind have been proposed in the past.

[0003] For example, Patent Document 1 discloses a fixing device for a fish finder for a floater.

[0004] This fixing device is designed to fix the fish detector to the stand by inserting screws into the fixing holes in the two arms of the stand and then inserting the screws into the screw holes of the fish finder. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2001-99932 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, this screw can be loosened by hand, which means that the fish finder can be easily removed from the mount and stolen.

[0007] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an anti-theft device that makes it difficult to remove an apparatus from a stand, thereby preventing theft. [Means for solving the problem]

[0008] In order to solve the above problems, the anti-theft device of the present invention is a device for preventing the theft of equipment that is attached to a stand with screws, and is characterized by having a base that is fixed to the stand together with the equipment with screws, a cover that can be attached to this base so as to cover the screws, and a lock for locking this cover so that it cannot be detached from the base. Effect of the Invention

[0009] According to the anti-theft device of the present invention, it is possible to make it difficult to remove the device from the stand, thereby preventing theft. [Brief description of the drawings]

[0010] The drawings show specific embodiments of the present invention, including essential features of the invention as well as alternative and preferred embodiments. [Figure 1] 1 is a perspective view showing a fish finder using an anti-theft device according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a partially exploded perspective view of the anti-theft device; [Diagram 3] FIG. [Figure 4] FIG. 4 is a cross-sectional view showing the anti-theft device in the process of being installed. [Diagram 5] FIG. 4 is a cross-sectional view showing the installed state of the anti-theft device. [Figure 6] FIG. 4 is a cross-sectional view showing the anti-theft device in a released state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0012] In FIG. 1, reference numeral 1 denotes a fish finder (equipment) that uses an anti-theft device 2 according to the present invention.

[0013] The fish finder 1 has a detector body 3, which is attached to a mount 7 firmly fixed by, for example, fixing screws 6 to a mounting seat 5 on, for example, the hull 4 of a boat or ship.

[0014] The mount 7 has a mounting portion 8 that is attached to the mounting base 5 with a fixing screw 6, and a pair of arms 9 that are bent and stand up from both sides of the mounting portion 8, and is formed in a substantially U-shape.

[0015] As shown in FIG. 2, a notch 10 is formed at the tip of each of these arm portions 9.

[0016] An attachment screw 11 is inserted into the notch 10 of one arm 9 and screwed into a screw hole 12 provided on one side of the detector body 3, and an attachment screw (screw) 13 is inserted into the notch 10 of the other arm 9 and screwed into a screw hole 14 provided on the other side of the detector body 3, so that the fish finder 1 is attached to the mount 7.

[0017] The mounting screw 11 is provided with a large diameter operating portion 51 that can be turned by a finger, and the mounting screw 13 is provided with a small diameter operating portion 52 that can be turned by a tool such as a screwdriver.

[0018] An anti-theft device 2 for preventing the theft of the fish finder 1 is attached to the other arm 9 by a mounting screw 13 .

[0019] That is, the anti-theft device 2 includes a base 15 that is fixed to the mount 7 together with the fish finder 1 by means of mounting screws 13, as shown in FIG.

[0020] This base 15 has a first cylindrical body 18 having an opening 16 on one end side and a bottom plate portion 17 on the other end side, and the bottom plate portion 17 of this first cylindrical body 18 is attached to the frame 7 by mounting screws 13 through holes 53 provided in this bottom plate portion 17.

[0021] The base body 15 has an inwardly extending locking portion 19 provided on the periphery of the opening 16 .

[0022] The anti-theft device 2 is provided with a cover 20 that can be attached to the base 15 so as to cover the mounting screws 13 .

[0023] The cover 20 includes a second cylindrical body 21 that fits onto the first cylindrical body 18, and a lock 22 is attached to the second cylindrical body 21 to lock the cover 10 to the base body 15 so that it cannot be removed.

[0024] As shown in FIG. 3, the second cylindrical body 21 has an opening 23 at one end and a mounting hole 24 for the lock 22 at the other end.

[0025] The lock 22 has a lock body 26 having a female thread portion 25 .

[0026] The lock body 26 is attached to the second cylindrical body 21 by inserting it into the mounting hole 24 of the second cylindrical body 21 and screwing the nut 27 into the female threaded portion 25 .

[0027] As shown in FIGS. 4 to 6, the lock 22 is provided with a locking body 28 that can be engaged with and disengaged from the locking portion 19 of the first cylindrical body 18. As shown in FIG.

[0028] Furthermore, the lock 22 is provided with a compression spring (biasing means) 29 that biases the locking body 28 in a direction that engages with the locking portion 19, and a hook 30 that disengages the locking body 28 from the locking portion against the biasing force of the compression spring 29.

[0029] Furthermore, the locking body 28 has a tapered portion 31 that abuts against the locking portion 19 when the cover 20 is attached to the base 15, thereby retracting the locking body 28 from the locking portion 19 against the biasing force of the compression spring 29.

[0030] In such a configuration, when the first cylindrical body 18 is attached to the mount 7 together with the fish finder 1 using the mounting screw 13, the small diameter operating portion 52 of the mounting screw 13 is positioned inside the first cylindrical body 18, as shown in Figure 5.

[0031] In this state, when the second cylindrical body 21 of the cover 20 is fitted into the first cylindrical body 18, the small diameter operating portion 52 of the mounting screw 13 cannot be rotated.

[0032] When this second cylindrical body 21 is fitted into the first cylindrical body 18, as shown in Figure 4, the tapered portion 31 of the locking body 28 abuts against the engagement portion 19, causing the locking body 28 to temporarily retreat from the locking portion 19 against the biasing force of the compression spring 29, and when the abutment between the tapered portion 31 and the locking portion 19 is released, as shown in Figure 5, the locking body 28 engages with the engagement portion 19 due to the biasing force of the compression spring 29.

[0033] This causes the cover 10 to be locked to the base body 15 so that it cannot be removed.

[0034] On the other hand, when removing the cover 10, the hook 30 is inserted into the lock 22 and operated as shown in FIG. 6, whereby the locking body 28 is retracted from the locking portion 19 against the biasing force of the compression spring 29.

[0035] This allows the cover 10 to be detached from the base body 15.

[0036] According to the above configuration, it is possible to make it difficult to remove the fish finder 1 from the mount 7, and it is possible to prevent the fish finder 1 from being stolen.

[0037] Moreover, since the locking body 28 is constructed so as to temporarily retreat from the locking portion 19 against the biasing force of the compression spring 29 when the cover 10 is attached, the cover 10 can be attached with a single touch.

[0038] In the above embodiment, the anti-theft device 2 is provided on one side of the stand 7, but in the present invention, it may be provided on both sides of the stand 7.

[0039] The disclosure regarding the present invention described above can be summarized at least as follows.

[0040] In other words, the anti-theft device of the present invention is a device for preventing the theft of equipment that is attached to a stand with screws, and is characterized by having a base that is fixed to the stand together with the equipment with the screws, a cover that can be attached to this base so as to cover the screws, and a lock for locking this cover so that it cannot be detached from the base.

[0041] The present invention can include at least the following embodiments, which can be adopted separately or in combination with each other.

[0042] (1) The base has a locking portion, and the lock has a locking body that can be freely engaged and disengaged with the locking portion. (2) The lock is provided with a biasing means for biasing the locking body in a direction to engage with the locking portion, and a hook for disengaging the locking body from the locking portion against the biasing force of the biasing means. (3) The engaging body has a tapered portion that abuts against the engaging portion when the cover is attached to the base, thereby causing the engaging body to retreat from the engaging portion against the biasing force of the biasing means. (4) The base body includes a first cylindrical body having an opening at one end and a bottom plate portion at the other end, the bottom plate portion being attached to the stand by screws or the like. (5) The locking portion is configured to extend inwardly from the periphery of the opening of the first cylindrical body. (6) The cover includes a second cylindrical body that fits over the first cylindrical body. [Explanation of symbols]

[0043] 1 Equipment (fish finder) 2 Anti-theft devices 7 Mounting 13 Screws (mounting screws) 15 Base 16 Opening 17 Bottom plate part 18 First cylindrical body 19 Locking part 20 Cover 21 Second cylindrical body 22 tablets 28 Locking body 29 Pressing means (compression spring) 30 hook 31 Tapered section

Claims

1. A device for preventing theft of equipment that is attached to a stand by screws, comprising: a base that is fixed to the stand together with the device by the screws; a cover that can be attached to the base so as to cover the screws; a lock for irremovably locking the cover from the base; An anti-theft device comprising:

2. The base body includes a locking portion, The lock has a locking body that can be freely engaged with and disengaged from the locking portion.

2. The anti-theft device according to claim 1.

3. The tablet comprises: a biasing means for biasing the locking body in a direction to engage with the locking portion; a hook for disengaging the engaging body from the engaging portion against the biasing force of the biasing means; 3. The anti-theft device according to claim 2, further comprising:

4. 4. The anti-theft device according to claim 3, wherein the locking body has a tapered portion that abuts against the locking portion when the cover is attached to the base, thereby causing the locking body to retreat from the locking portion against the biasing force of the biasing means.

5. 3. The anti-theft device according to claim 2, wherein the base body comprises a first cylindrical body having an opening at one end and a bottom plate portion at the other end, the bottom plate portion being attached to the mount by the screws.

6. 6. The anti-theft device according to claim 5, wherein the locking portion extends inwardly from a periphery of the opening of the first cylindrical body.

7. 6. The anti-theft device according to claim 5, wherein the cover includes a second cylindrical body that fits over the first cylindrical body.

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