Chip type vibration sensor

Abstract

The utility model relates to a chip type vibration sensor which comprises a shell, a first electrode, a second electrode and a top cover, the first electrode and the second electrode are arranged in the shell, the top cover is fixed on the shell, and an installation groove used for installing the first electrode and the second electrode is formed in the shell. The mounting groove comprises a first placing groove for placing the first electrode and a second placing groove for placing the second electrode, a conductive protruding part extending towards the second electrode is arranged at the position, corresponding to the second electrode, of the top cover, and the conductive protruding part and the groove bottom of the second placing groove are arranged at an interval; a conductive piece is arranged on the side wall of the second containing groove and electrically connected with the conductive protruding part and the second electrode. According to the invention, the conductive part is electrically connected with the conductive protruding part and the second electrode, so that the second electrode, the conductive part and the conductive protruding part form a movable cavity which can be mutually conducted, and therefore, the first electrode and the second electrode can be conducted at the first time when receiving external vibration, and the sensitivity of the sensor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration sensors, in particular to a chip-type vibration sensor. Background Art

[0002] A vibration sensor converts mechanical vibration signals into electrical signals, which are then transmitted to appropriate circuits for processing. Vibration sensors are widely used in toys, small appliances, and various security products, becoming an indispensable electronic product on the market.

[0003] Chinese patent application number CN202310516489 discloses a new type of chip-type vibration sensor, including a shell, a placement groove, and a first electrode and a second electrode leading to the placement groove. An inner core is installed in the placement groove, which can connect the first electrode and the second electrode through vibration. The inner core has a thin sheet structure and is flatly laid in the placement groove; the inner core includes a fixed electrical connection end fixedly connected to the first electrode, a movable electrical connection end spaced apart from the second electrode, and an elastic electrical connection part that elastically supports and electrically connects the fixed electrical connection end and the movable electrical connection end.

[0004] Based on the above-mentioned related technologies, the inventors believe that when the sensor senses vibration, the movement direction of the movable electrical connection end spaced apart from the second electrode has a certain uncertainty, which makes the movable electrical connection end unable to contact the second electrode in the first time, thereby causing the first electrode and the second electrode to be unable to be conductive in the first time, thereby reducing the sensitivity of the sensor. Utility Model Content

[0005] The present invention aims to solve the problems existing in the prior art and provides a chip-type vibration sensor, which enables the first electrode and the second electrode to be connected immediately when vibration is generated in the outside world, thereby improving the sensitivity of the sensor.

[0006] The utility model adopts the following technical solution to solve its technical problems: a chip-type vibration sensor, comprising a shell, a first electrode and a second electrode arranged in the shell, and a top cover fixed to the shell, wherein a mounting groove for mounting the first electrode and the second electrode is provided in the shell, and the mounting groove comprises a first placement groove for placing the first electrode and a second placement groove for placing the second electrode, and a conductive protrusion extending toward the second electrode is provided on the top cover corresponding to the second electrode, and the conductive protrusion is spaced apart from the bottom of the second placement groove; a conductive member is provided on the side wall of the second placement groove, and the conductive member electrically connects the conductive protrusion and the second electrode.

[0007] A conductive protrusion extending toward the second electrode is provided at the position of the top cover corresponding to the second electrode, and a conductive member is provided on the side wall of the second placement groove. The conductive protrusion and the second electrode are electrically connected by the conductive member, so that the second electrode, the conductive member and the conductive protrusion form an electrically connected movable cavity.

[0008] Preferably, the conductive member includes side conductive sheets arranged on both side walls of the second placement groove and a front conductive sheet arranged on the front end side wall of the second placement groove. The side conductive sheets, the front conductive sheet, the conductive protrusion and the second electrode form an active cavity.

[0009] Preferably, the front conductive sheet includes an outer conductive sheet arranged on the side wall of the second placement groove and away from the first placement groove, a top conductive sheet connected to the outer conductive sheet and arranged on the top end surface of the second placement groove, and a bottom conductive sheet connected to the outer conductive sheet and arranged on the second electrode. The structure of the front conductive sheet is consistent with the structure of the side conductive sheet.

[0010] Preferably, the front conductive sheet and the side conductive sheet are integrally provided.

[0011] Preferably, the conductive member is a conductive film sprayed on the side wall of the second placement groove.

[0012] Preferably, the side wall of the second placement groove is an inclined surface arranged obliquely downward toward the center of the second placement groove.

[0013] Preferably, the conductive protrusion is plugged into and matched with the notch of the second placement slot.

[0014] Preferably, the side wall of the conductive protrusion is an inclined surface and fits in with the side wall of the second placement groove.

[0015] Preferably, the top cover is made of a conductive material, and the top cover and the conductive protrusion are integrally formed.

[0016] Preferably, the mounting groove is provided with an inner core for connecting the first electrode and the second electrode, the inner core includes a fixed electrical connection end fixedly connected to the first electrode, a movable electrical connection end spaced apart from the second electrode, and an elastic electrical connection portion elastically supporting and electrically connecting the fixed electrical connection end and the movable electrical connection end, and the conductive member is spaced apart from the movable electrical connection end.

[0017] The beneficial effects of the present invention are as follows: the present invention provides a conductive member on the side wall of the second placement groove, and provides a conductive protrusion extending toward the second electrode at a position corresponding to the second electrode. The conductive protrusion is spaced apart from the bottom of the second placement groove. The conductive member provided on the side wall electrically connects the conductive protrusion and the second electrode, so that the second electrode, the front conductive sheet, the side conductive sheet, and the conductive protrusion form a movable cavity in which the movable electrical connection end can move. Because the second electrode, the front conductive sheet, the side conductive sheet, and the conductive protrusion are electrically connected to each other, when the sensor senses external vibration, the first electrode and the second electrode can be electrically connected immediately regardless of the direction in which the movable electrical connection end moves, thereby improving the sensitivity of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the overall structure of the housing in Example 1;

[0019] Figure 2 is a cross-sectional view of embodiment 1;

[0020] Figure 3 for Figure 2 A magnified view of the structure of part A;

[0021] Figure 4 is a cross-sectional view of the housing at the second electrode in Example 1;

[0022] Figure 5 This is a schematic structural diagram of the top cover in Example 1;

[0023] Figure 6 This is a cross-sectional view of the shell at the second electrode in Example 2.

[0024] Explanation of the accompanying drawings: 1. Shell; 11. Mounting slot; 111. First placement slot; 112. Second placement slot; 2. Conductive member; 21. Front conductive sheet; 211. Outer conductive sheet; 212. Top conductive sheet; 213. Bottom conductive sheet; 22. Side conductive sheet; 3. First electrode; 4. Second electrode; 5. Inner core; 51. Fixed electrical connection terminal; 52. Movable electrical connection terminal; 53. Elastic electrical connection portion; 6. Top cover; 61. Conductive protrusion. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-6 The utility model is further described as follows:

[0026] Example 1

[0027] Reference Figure 1As shown, the present invention discloses a chip-type vibration sensor, comprising a housing 1 with a mounting slot 11 formed on the top, a first electrode 3 and a second electrode 4 disposed at both ends of the mounting slot 11, and an inner core 5 fixed to the first electrode 3. When the sensor receives external vibration, the inner core 5 connects the first electrode 3 and the second electrode 4, thereby achieving vibration sensing.

[0028] Reference Figure 2 As shown, the mounting groove 11 includes a first placement groove 111 for accommodating the first electrode 3 and a second placement groove 112 for accommodating the second electrode 4. The inner core 5 is a thin sheet of conductive metal plate. The inner core 5 includes a fixed electrical connection end 51 fixedly electrically connected to the first electrode 3, a movable electrical connection end 52 spaced apart from the second electrode 4, and an elastic electrical connection portion 53 that elastically supports and electrically connects the fixed electrical connection end 51 and the movable electrical connection end 52. Because the second electrode 4 and the movable electrical connection end 52 need to be spaced apart, the middle portion of the first electrode 3 is stamped upward to form a boss, raising the height of the first electrode 3, and the fixed electrical connection end 51 is horizontally fixed to the boss.

[0029] Combine Figure 2 、 Figure 4 and Figure 5 As shown, the sidewalls of the second placement groove 112 are inclined surfaces that are tilted downward toward the center of the second placement groove 112. A conductive protrusion 61 extending toward the second electrode 4 is provided on the top cover 6 at a location corresponding to the second electrode 4. The sidewalls of the conductive protrusion 61 are inclined surfaces that are tilted toward the center of the second placement groove 112. The inclined surfaces formed by the sidewalls of the conductive protrusion 61 closely align with the inclined surfaces formed by the sidewalls of the second placement groove 112. The close fit between the sidewalls of the conductive protrusion 61 and the sidewalls of the second placement groove 112 prevents the occurrence of a lack of electrical continuity due to poor contact between the conductive protrusion 61 and the sidewalls of the second placement groove 112.

[0030] Combine Figure 2 、 Figure 3 and Figure 5 As shown, a conductive member 2 is provided within the sidewalls of the second placement slot 112. The conductive member 2 includes side conductive sheets 22 disposed on the sidewalls of the second placement slot 112 and a front conductive sheet 21 disposed on the front sidewall of the second placement slot 112. The side conductive sheets 22 and the front conductive sheet 21 are integrally provided and have the same structure. The front conductive sheet 21 will be described in detail below. The front conductive sheet 21 includes an outer conductive sheet 211 disposed on the sidewall of the second mounting slot 11 and away from the first placement slot 111; a top conductive sheet 212 connected to the outer conductive sheet 211 and disposed on the top end surface of the second placement slot 112; and a bottom conductive sheet 213 connected to the outer conductive sheet 211 and disposed on the second electrode 4.

[0031] Combine Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, the conductive member 2 electrically connects the conductive protrusion 61 and the second electrode 4, so that the second electrode 4, the conductive member 2 and the conductive protrusion 61 are electrically connected. At the same time, the conductive protrusion 61 and the inner core 5 are spaced apart, and the conductive member 2 and the movable electrical connection end 52 of the inner core 5 are also spaced apart. After the top cover 6 is covered on the shell 1, the second electrode 4, the front conductive member 2, the side conductive member 2 and the conductive protrusion 61 form a movable cavity for the movable electrical connection end 52 to move. Since the second electrode 4, the front conductive member 2, the side conductive member 2 and the conductive protrusion 61 are electrically connected to each other, the movable electrical connection end 52 can immediately achieve electrical connection with the second electrode 4 no matter which direction it moves, thereby enabling the first electrode 3 and the second electrode 4 to be electrically connected immediately, thereby improving the sensitivity of the sensor.

[0032] The top cover 6 is a conductive metal plate, and the top cover 6 and the conductive protrusion 61 are integrally formed. On the one hand, the integral forming process is simple, and on the other hand, the integral forming of the top cover 6 and the conductive protrusion 61 can also prevent the conductive protrusion 61 from falling off the top cover 6.

[0033] The top cover 6 is sealed with the housing 1 to enclose the space in the mounting groove 11 into a sealed movable cavity, thereby reducing moisture or dust from entering the mounting groove 11 and affecting the conduction between the movable electrical connection terminal 52 and the second electrode 4 .

[0034] The housing 1 is an integrally molded part formed by injection molding on the first electrode 3 and the second electrode 4. The first electrode 3 and the second electrode 4 are placed horizontally in the mold and accurately positioned, and then the housing 1 is integrally molded on the first electrode 3 and the second electrode 4 by injection molding.

[0035] Example 2

[0036] Reference Figure 6 As shown, this embodiment differs from the first embodiment in that the conductive member 2 is a conductive film sprayed onto the sidewalls of the second placement groove 112. To facilitate spraying the conductive film onto the sidewalls of the second placement groove 112, the sidewalls of the second placement groove 112 are configured as inclined surfaces sloping downward toward the center of the second placement groove 112. When a worker sprays the conductive film from the top of the second placement groove 112, the sidewalls of the second placement groove 112 are completely covered with the conductive film.

[0037] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0038] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A chip-type vibration sensor, comprising a housing (1), a first electrode (3) and a second electrode (4) disposed in the housing (1), and a top cover (6) fixed to the housing (1), wherein a mounting groove (11) for mounting the first electrode (3) and the second electrode (4) is provided in the housing (1), and wherein: The mounting groove (11) comprises a first placement groove (111) for placing the first electrode (3) and a second placement groove (112) for placing the second electrode (4); the top cover (6) is provided with a conductive protrusion (61) extending toward the second electrode (4) at a position corresponding to the second electrode (4); the conductive protrusion (61) is spaced apart from the bottom of the second placement groove (112); a conductive member (2) is provided on the side wall of the second placement groove (112); the conductive member (2) is electrically connected to the conductive protrusion (61) and the second electrode (4).

2. The chip-type vibration sensor according to claim 1, characterized in that: The conductive member (2) comprises side conductive sheets (22) arranged on both side walls of the second placement groove (112) and a front conductive sheet (21) arranged on the front end side wall of the second placement groove (112); the side conductive sheets (22), the front conductive sheet (21), the conductive protrusion (61) and the second electrode (4) form a movable cavity.

3. The chip-type vibration sensor according to claim 2, wherein: The front conductive sheet (21) comprises an outer conductive sheet (211) disposed on a side wall of the second placement groove (112) and away from the first placement groove (111), a top conductive sheet (212) connected to the outer conductive sheet (211) and disposed on the top end surface of the second placement groove (112), and a bottom conductive sheet (213) connected to the outer conductive sheet (211) and disposed on the second electrode (4). The structure of the front conductive sheet (21) is consistent with that of the side conductive sheet (22).

4. The chip-type vibration sensor according to claim 2, wherein: The front conductive sheet (21) and the side conductive sheet (22) are integrally provided.

5. The chip-type vibration sensor according to claim 1, wherein: The conductive member (2) is a conductive film sprayed on the side wall of the second placement groove (112).

6. The chip-type vibration sensor according to claim 5, characterized in that: The side wall of the second placement groove (112) is an inclined surface arranged downwardly towards the center of the second placement groove (112).

7. The chip-type vibration sensor according to claim 6, characterized in that: The conductive protrusion (61) is plug-fitted into the notch of the second placement slot (112).

8. The chip-type vibration sensor according to claim 7, characterized in that: The side wall of the conductive protrusion (61) is an inclined surface and fits in with the side wall of the second placement groove (112).

9. The chip-type vibration sensor according to claim 1, characterized in that: The top cover (6) is made of a conductive material, and the top cover (6) and the conductive protrusion (61) are integrally formed.

10. The chip-type vibration sensor according to claim 1, characterized in that: An inner core (5) for connecting the first electrode (3) and the second electrode (4) is provided on the mounting groove (11), the inner core (5) comprising a fixed electrical connection end (51) fixedly connected to the first electrode (3), a movable electrical connection end (52) spaced apart from the second electrode (4), and an elastic electrical connection portion (53) elastically supporting and electrically connecting the fixed electrical connection end (51) and the movable electrical connection end (52), the conductive member (2) being spaced apart from the movable electrical connection end (52).

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