Acceleration sensor

Abstract

The utility model relates to the technical field of acceleration sensors, and discloses an acceleration sensor comprising a lower housing, one end of the lower housing is fixedly connected with a rubber sleeve, and the inner wall of the rubber sleeve is slidably connected with a cable. By pulling a cable, the cable can drive a rubber sleeve to be bent, the rubber sleeve drives a fixed shell to move, a movable block slides in the fixed shell, the movable block is promoted to extrude or stretch a first spring, then the fixed block drives the movable block to move, and a first ball and a second ball at the two ends of a connecting rod rotate in the fixed block and the movable block correspondingly; and when the first ball and the second ball cannot rotate any more, the protection mechanism enables the cable to only bend at a small angle, so that the bending angle of the cable is restrained through the protection mechanism, the bending amplitude is controlled within a safety threshold, the problem of accelerated wear of the skin caused by excessive bending is effectively inhibited, a mechanical conduction path for exposing a cable core is blocked, and the service life of the cable is prolonged. Finally, long-term stability of signal transmission of the acceleration sensor is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to acceleration sensor technical field, concretely is an acceleration sensor. BACKGROUND

[0002] Acceleration sensor is a kind of electronic device for measuring the acceleration of object motion, can perceive speed change or vibration state by detecting inertial force. Its core principle is based on piezoelectric effect, capacitance change or micro electro mechanical system (MEMS) technology, and acceleration signal is converted into electric signal output by internal sensitive element. Modern acceleration sensor usually has high sensitivity, wide range and low power consumption characteristics, and with the progress of MEMS technology, has realized miniaturization, integration and low cost.

[0003] Existing acceleration sensor transmits signal by interface connecting cable, but in dynamic use, the frequent large-angle bending of cable can cause the accelerated wear of outer skin in bending area, and long-term mechanical stress can cause the exposure of wire core, cause signal distortion or transmission interruption, affect the signal transmission integrity of acceleration sensor. UTILITY MODEL CONTENT

[0004] To realize the above-mentioned purpose, the utility model provides an acceleration sensor.

[0005] The technical scheme of the utility model is realized as follows: an acceleration sensor, including lower shell, one end of the lower shell is fixedly connected with rubber sleeve, the inner wall of the rubber sleeve is slidably connected with cable, one end of the cable has acceleration sensor body, the top of the lower shell is provided with upper shell, the lower shell is provided with protection mechanism for preventing cable from excessive bending, one end of the lower shell is fixedly connected with fixed block, the inside of the fixed block is rotatably connected with first ball, the outer circular surface of the first ball is fixedly connected with connecting rod, one end of the connecting rod is fixedly connected with second ball, the outside of the rubber sleeve is fixedly connected with connecting sleeve, the inside of the connecting sleeve is fixedly connected with fixed shell, the inside of the fixed shell is slidably connected with moving block, the inside of the fixed shell is fixedly connected with first spring, one end of the fixed shell is provided with circular groove.

[0006] Preferably, the moving block is rotatably connected with the second ball, the moving block is fixedly connected with the first spring, and the initial position of the moving block is located in the middle of the fixed shell.

[0007] Preferably, the outer diameter of the connecting rod is less than the inner diameter of the circular groove on the fixed shell.

[0008] Preferably, the lower shell is provided with a fixing mechanism for fixing the acceleration sensor body, the lower shell is fixedly connected with a fixing seat inside, the fixing seat is hinged with a fixing plate, the fixing plate is hinged with a support arm, the support arm is hinged with a moving seat, the lower shell is fixedly connected with a round rod inside, and the rod body of the round rod is sleeved with a second spring.

[0009] Preferably, the moving seat is slidably connected with the round rod, and the moving seat is fixedly connected with the second spring.

[0010] Preferably, the top of the fixing plate is fixedly connected with a rubber pad.

[0011] Preferably, the upper shell is provided with a fixing mechanism inside.

[0012] Preferably, the bottom of the lower shell is provided with a first threaded groove, the inside of the first threaded groove of the lower shell is rotatably connected with a bolt rod, the inside of the upper shell is provided with a second threaded groove, and the inside of the second threaded groove of the upper shell is rotatably connected with a bolt rod.

[0013] The utility model has the advantages of the following:

[0014] 1. The acceleration sensor, through the cable pulling, the cable will drive the rubber sleeve to bend, the rubber sleeve drives the fixed shell to move, the moving block in the fixed shell slides, the moving block extrudes or stretches the first spring, then the fixed block drives the moving block to move, the second ball at one end of the connecting rod rotates in the moving block, until the rod body of the connecting rod is close to the circular groove on the fixed shell, and the fixed shell also drives the first ball at the other end of the connecting rod to rotate on the fixed block, until the first ball cannot rotate any more, at this time, the protection mechanism makes the cable only bend at a small angle, so that the bending angle of the cable is restricted through the protection mechanism, and the bending amplitude is controlled within a safety threshold, so that the problem of skin accelerated wear caused by excessive bending is effectively inhibited, the mechanical transmission path of the wire core exposure is blocked, and the long-term stability of acceleration sensor signal transmission is finally ensured.

[0015] 2. The acceleration sensor, by combining the upper shell and the lower shell, the acceleration sensor body moves the fixed plate, the fixed plate moves the support arm, the support arm moves the moving seat to slide on the round rod, so that the moving seat extrudes the second spring sleeved on the round rod, and when the upper shell and the lower shell are completely combined, the fixed plate fixes the acceleration sensor body, so that the fixed mechanism can fix acceleration sensor bodies of different sizes. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the overall structure schematic view of the utility model;

[0017] Figure 2 It is the fixed shell related position schematic view of the utility model;

[0018] Figure 3 It is the related position schematic view of first spring of the utility model;

[0019] Figure 4 It is the related position schematic view of bolt rod of the utility model;

[0020] Figure 5 It is the related position schematic view of support arm of the utility model;

[0021] Figure 6 It is the related position schematic view of rubber pad of the utility model;

[0022] Figure 7 It is the related position schematic view of second spring of the utility model;

[0023] Figure 8 It is the related position schematic view of fixed plate of the utility model.

[0024] Among them, each reference sign in the drawing:

[0025] 1, lower shell;2, upper shell;3, rubber sleeve;4, protection mechanism;401, fixed block;402, first ball;403, connecting rod;404, second ball;405, moving block;406, fixed shell;407, first spring;408, round groove;5, fixed mechanism;501, fixed plate;502, rubber pad;503, fixed seat;504, support arm;505, moving seat;506, round rod;507, second spring;6, acceleration sensor body;7, cable;8, first thread groove;9, second thread groove;10, bolt rod;11, connecting sleeve. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0027] For example, Figures 1-8As shown, the acceleration sensor provided by the embodiment comprises a lower shell 1, one end of the lower shell 1 is fixedly connected with a rubber sleeve 3, the inner wall of the rubber sleeve 3 is slidably connected with a cable 7, one end of the cable 7 is provided with an acceleration sensor body 6, the top of the lower shell 1 is provided with an upper shell 2, the lower shell 1 is provided with a protection mechanism 4 for preventing the cable 7 from being excessively bent, one end of the lower shell 1 is fixedly connected with a fixed block 401, the inside of the fixed block 401 is rotatably connected with a first ball 402, the outer circular surface of the first ball 402 is fixedly connected with a connecting rod 403, one end of the connecting rod 403 is fixedly connected with a second ball 404, the outside of the rubber sleeve 3 is fixedly connected with a connecting sleeve 11, the inside of the connecting sleeve 11 is fixedly connected with a fixed shell 406, the inside of the fixed shell 406 is slidably connected with a moving block 405, the inside of the fixed shell 406 is fixedly connected with a first spring 407, and the fixed shell 406 is provided with a circular groove 408 at one end.

[0028] Further, the moving block 405 is rotatably connected with the second ball 404, the moving block 405 is fixedly connected with the first spring 407, and the initial position of the moving block 405 is located in the middle of the fixed shell 406.

[0029] By adopting the above technical scheme, the protection mechanism 4 located inside the bending area of the cable 7 can make the moving block 405 extrude the first spring 407, and the protection mechanism 4 located outside the bending area of the cable 7 can make the moving block 405 stretch the first spring 407, and when the initial position of the moving block 405 is located in the middle of the fixed shell 406, the protection mechanism 4 can adapt to the small-angle bending of the cable 7.

[0030] Further, the outer diameter of the connecting rod 403 is smaller than the inner diameter of the circular groove 408 on the fixed shell 406.

[0031] By adopting the above technical scheme, the connecting rod 403 can move at the circular groove 408 on the fixed shell 406.

[0032] Further, the lower shell 1 is provided with a fixing mechanism 5 for fixing the acceleration sensor body 6, the inside of the lower shell 1 is fixedly connected with a fixed seat 503, the fixed seat 503 is hinged with a fixed plate 501, the fixed plate 501 is hinged with a support arm 504, the support arm 504 is hinged with a moving seat 505, the inside of the lower shell 1 is fixedly connected with a circular rod 506, and the rod body of the circular rod 506 is sleeved with a second spring 507.

[0033] Further, the moving seat 505 is slidably connected with the circular rod 506, and the moving seat 505 is fixedly connected with the second spring 507.

[0034] By adopting the above technical scheme, by sliding the moving seat 505 on the circular rod 506, the moving seat 505 can extrude the second spring 507 sleeved on the circular rod 506, and the second spring 507 can exert a reverse thrust on the moving seat 505.

[0035] Further, the top of the fixing plate 501 is fixedly connected with a rubber pad 502.

[0036] By adopting the above technical scheme, the rubber pad 502 is used to avoid the direct contact between the acceleration sensor body 6 and the fixing plate 501, so as to avoid the damage of the fixing plate 501 to the acceleration sensor body 6.

[0037] Further, the inside of the upper shell 2 is provided with a fixing mechanism 5.

[0038] By adopting the above technical scheme, the fixing mechanism 5 on the upper shell 2 cooperates with the fixing mechanism 5 on the lower shell 1, so as to fix the acceleration sensor body 6.

[0039] Further, the bottom of the lower shell 1 is provided with a first threaded groove 8, the inside of the upper shell 2 is provided with a second threaded groove 9, and the inside of the first threaded groove 8 on the lower shell 1 is rotatably connected with a bolt rod 10.

[0040] By adopting the above technical scheme, when the upper shell 2 and the lower shell 1 are combined, the first threaded groove 8 on the lower shell 1 is matched with the second threaded groove 9 on the upper shell 2, and the bolt rod 10 is rotated into the first threaded groove 8 on the lower shell 1 and the second threaded groove 9 on the upper shell 2, so as to fix the upper shell 2 and the lower shell 1 together.

[0041] Working principle: when using, the acceleration sensor body 6 is placed on the fixing mechanism 5 of the lower shell 1, then the cable 7 is connected with the acceleration sensor body 6 through the rubber sleeve 3, after that, the upper shell 2 and the lower shell 1 are closed, in the process of closing, the acceleration sensor body 6 will push the fixed plate 501 to move, the fixed plate 501 will rotate with the fixed seat 503 as the fulcrum, at the same time, the fixed plate 501 pushes the support arm 504 to move, the support arm 504 pushes the moving seat 505 to slide on the round rod 506, so that the moving seat 505 extrudes the second spring 507 sleeved on the round rod 506, the second spring 507 will exert a reverse thrust on the moving seat 505, which is transmitted to the fixed plate 501, when the upper shell 2 and the lower shell 1 are completely closed, the fixed plate 501 will fix the acceleration sensor body 6, so that the fixing mechanism 5 on the upper shell 2 and the lower shell 1 can fix acceleration sensor bodies 6 of different sizes; during the use of the acceleration sensor body 6, the cable 7 will be pulled left and right, the cable 7 will bend the rubber sleeve 3 together, the rubber sleeve 3 will drive the fixed shell 406 to move, so that the moving block 405 slides in the fixed shell 406, but the fixed shell 406 inside the bending area of the rubber sleeve 3 will move close to the fixed block 401, which will cause the moving block 405 to extrude the first spring 407, and the fixed shell 406 outside the bending area of the rubber sleeve 3 will move away from the fixed block 401, which will cause the moving block 405 to stretch the first spring 407, then the fixed block 401 drives the moving block 405 to move, so that the second ball 404 at one end of the connecting rod 403 rotates in the moving block 405, until the rod body of the connecting rod 403 closely fits the circular groove 408 on the fixed shell 406, and the fixed shell 406 also causes the first ball 402 at the other end of the connecting rod 403 to rotate on the fixed block 401, until the first ball 402 cannot rotate any more, the fixed shell 406 completes a small angle rotation, at this time, the protection mechanism 4 allows the cable 7 to only bend at a small angle and cannot be excessively bent, so that the bending angle of the cable 7 is limited through the protection mechanism 4, thereby avoiding the cable 7 from being excessively bent and causing the bent part to be tight.

[0042] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An acceleration sensor comprising a lower housing (1), characterized in that: The lower shell (1) one end fixedly connected with rubber sleeve (3), the rubber sleeve (3) inner wall slidingly connected with cable (7), the cable (7) one end has acceleration sensor body (6), the lower shell (1) top is provided with upper shell (2), the lower shell (1) is provided with the protection mechanism (4) for preventing cable (7) excessive bending, the lower shell (1) one end fixedly connected fixed block (401), the fixed block (401) inside rotationally connected with first ball (402), the first ball (402) outer circular face fixedly connected with connecting rod (403), the connecting rod (403) one end fixedly connected with second ball (404), the rubber sleeve (3) outside fixedly connected with connecting sleeve (11), the connecting sleeve (11) inside fixedly connected with fixed shell (406), the fixed shell (406) inside slidingly connected with moving block (405), the fixed shell (406) inside fixedly connected with first spring (407), the fixed shell (406) one end is provided with circular groove (408).

2. An acceleration sensor according to claim 1, characterized in that: The moving block (405) is rotatably connected with the second ball (404), the moving block (405) is fixedly connected with the first spring (407), and the moving block (405) is located in the middle of the fixed shell (406) in the initial position.

3. An acceleration sensor according to claim 1, characterized in that: The outer diameter of the connecting rod (403) is less than the inner diameter of the circular groove (408) on the fixed shell (406).

4. An acceleration sensor according to claim 1, characterized in that: The lower shell (1) is provided with a fixing mechanism (5) for fixing the acceleration sensor body (6), the lower shell (1) is fixedly connected with a fixed seat (503), the fixed seat (503) is hingedly connected with a fixed plate (501), the fixed plate (501) is hingedly connected with a support arm (504), the support arm (504) is hingedly connected with a moving seat (505), the lower shell (1) is fixedly connected with a circular rod (506), and the rod body of the circular rod (506) is sleeved with a second spring (507).

5. An acceleration sensor according to claim 4, characterised in that: The moving seat (505) is slidingly connected with the circular rod (506), and the moving seat (505) is fixedly connected with the second spring (507).

6. An acceleration sensor according to claim 4, characterised in that: The fixed plate (501) is fixedly connected with a rubber pad (502) on the top.

7. An acceleration sensor according to claim 1, characterized in that: The upper shell (2) is provided with a fixing mechanism (5) inside.

8. The acceleration sensor of claim 1, wherein: The lower shell (1) is provided with a first threaded groove (8) at the bottom, the upper shell (2) is provided with a second threaded groove (9) inside, and the lower shell (1) is rotatably connected with a bolt rod (10) in the first threaded groove (8) inside.

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