Simple vibration sensor

Abstract

A simple vibration sensor comprises a sensor shell with an installation cavity formed in the inner side and a vibration sensing part installed in the installation cavity and used for conductive connection. The vibration sensing part comprises a fixed part which is in contact and limited on the inner wall of the mounting cavity and is used for receiving vibration, a connecting part which is positioned in the mounting cavity, is connected with the fixed part and is used for transmitting vibration, and an elastic deformation part which is connected to the connecting part and is opposite to the fixed part; a conductive part for fixing the fixing part on the sensor shell is arranged on the inner wall of the sensor shell, and the sensor shell comprises a top plate, supporting connecting parts which are arranged on the left side and the right side of the top plate, integrally connected with the top plate and bent downwards, and surrounding parts which are arranged on the front side and the rear side of the top plate, integrally connected with the top plate and bent downwards; the front side and the rear side of the fixing part are in contact limiting with the inner walls of the front surrounding part and the rear surrounding part respectively, and the side, away from the connecting part, of the fixing part is in contact limiting with the inner wall of the supporting connecting part.

Description

Technical Field

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

[0002] Mechanical sensors convert mechanical signals generated by vibration into electrical signals and transmit them to circuits for processing. They are widely used in toys, small household appliances and various anti-theft security products.

[0003] A miniature vibration sensor with patent application number CN200420006790.6 includes a conductive spring, a conductive base rod and a packaging shell; the conductive base rod is precisely fixed in the center of the conductive spring body and does not contact the conductive spring body, and is packaged by a shell, and conductive pins are respectively led out from the conductive spring and the conductive base rod; when the miniature vibration sensor senses external vibration, the conductive spring elastically shakes and instantly contacts the conductive base rod, and the conductive pins corresponding to the conductive spring and the conductive base rod are connected, thereby outputting a vibration signal to the external circuit; when there is no induced vibration, the conductive spring does not contact the conductive base rod, the external circuit is open, and no vibration signal is generated. In the above application, the conductive spring lacks positioning when it is installed and fixed, which makes the position accuracy of the conductive spring low, and thus makes the sensitivity consistency of the same batch of vibration sensors poor when mass-producing vibration sensors. Summary of the invention

[0004] The utility model aims to solve the problems existing in the prior art and provides a simple vibration sensor. The sensitivity consistency between different sensors of the vibration sensor is high during batch production.

[0005] The utility model adopts a technical solution to solve its technical problems: this simple vibration sensor includes a sensor housing with an installation cavity formed on the inner side and a vibration sensing part installed in the installation cavity for conductive connection, the vibration sensing part includes a fixing part contact-limited on the inner wall of the installation cavity for receiving vibration, a connecting part located in the installation cavity and connected to the fixing part for transmitting vibration, and an elastic deformation part connected to the connecting part, arranged opposite to the fixing part and suspended in the installation cavity, a conductive part for fixing the fixing part on the sensor housing is provided on the inner wall of the sensor housing, the fixing part in the vibration sensing part is contact-limited in the installation cavity, so that the vibration sensing part can be accurately positioned during installation, thereby ensuring high positioning accuracy of the vibration sensing part in the vibration sensor.

[0006] Preferably, the sensor housing includes a top plate, a supporting connection part arranged on the left and right sides of the top plate, which is integrally connected to the top plate and bent downward, and an enclosing part arranged on the front and rear sides of the top plate, which is integrally connected to the top plate and bent downward. The top plate, the supporting connection part and the enclosing part surround and form an installation cavity, and the front and rear sides of the fixing part are respectively contacted and limited with the inner walls of the front and rear enclosing parts, and the side of the fixing part away from the connecting part is contacted and limited with the inner wall of the supporting connection part.

[0007] Preferably, the front and rear surrounding parts are both provided with a raised part which protrudes toward the installation cavity and is located outside the fixed part for limiting the movement of the fixed part to the left; the raised part is provided to further limit the movement of the fixed part on the basis of the contact limit between the fixed part and the supporting connecting part, thereby making the positioning accuracy of the fixed part higher and facilitating the uniformity of the installation position of the vibration sensing part.

[0008] Preferably, the supporting connection part includes a supporting plate bent downward and a welding fixing plate arranged at the lower end of the supporting plate and bent outward. The welding fixing plate bent outward is arranged on the supporting plate, thereby facilitating welding and fixing of the supporting connection part to the circuit board.

[0009] Preferably, the conductive part is a conductive glue arranged on the sensor housing, and the top plate is provided with a limiting step which protrudes into the installation cavity and is located outside the fixing part for limiting the flow of the conductive glue.

[0010] Preferably, the elastic deformation part is a cylindrical spring and is horizontally arranged in the installation cavity. A pair of positioning parts protruding into the installation cavity are provided on the top plate. The positioning parts are located at the front and rear sides of the elastic deformation part for positioning the elastic deformation part.

[0011] Preferably, a process channel is provided on the surrounding portion and penetrates the surrounding portion from top to bottom.

[0012] Preferably, the fixing portion, the connecting portion and the elastic deformation portion are integrally formed, so that the integrity of the vibration sensing portion is better and the service life of the vibration sensing portion is longer.

[0013] The beneficial effect of the utility model is that the fixed part in the vibration sensing part of the utility model contacts and limits on the inner wall of the installation cavity, so that the fixed part of the vibration sensing part is contacted and positioned through the installation cavity when the vibration sensing part is installed, and at the same time, a pair of positioning parts protruding into the installation cavity are arranged on the top plate, so that the elastic deformation part in the vibration sensing part is positioned between the positioning parts during installation, thereby facilitating accurate fixation of the fixed part, and further, when mass-producing vibration sensors, the installation accuracy of the vibration sensing parts in different vibration sensors is high, thereby ensuring the high consistency of the sensitivity of the vibration sensors. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a bottom view of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the vibration sensing part;

[0017] Figure 4 for Figure 2 View in AA direction;

[0018] Figure 5 It is a schematic diagram of the structure of the sensor housing during batch punching and bending;

[0019] Figure 6 for Figure 5 Enlarged view of part B.

[0020] Explanation of the accompanying drawings: 1. Installation cavity, 2. Sensor housing, 3. Vibration sensing part, 3-1. Fixing part, 3-2. Connecting part, 3-3. Elastic deformation part, 4. Conductive part, 2-1. Top plate, 2-2. Support connecting part, 2-3. Surrounding part, 5. Raised part, 2-2-1. Support plate, 2-2-2. Welding fixing plate, 6. Limiting step, 7. Positioning part, 8. Process channel, 9. Circuit board, 10. Pole, 11. Plate, 12. Semi-finished product, 13. Center connecting part. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings:

[0022] See attached Figure 1 and 2 As shown: In this embodiment, a simple vibration sensor is disclosed, including a sensor housing 2 with an installation cavity 1 formed on the inner side and a vibration sensing part 3 installed in the installation cavity 1 for conductive connection; specifically, the sensor housing 2 in this embodiment is quickly formed by bending a plate, and the sensor housing 2 in this embodiment includes a top plate 2-1, a supporting connection part 2-2 arranged on the left and right sides of the top plate 2-1, which is integrally connected to the top plate 2-1 and bent downward, and an enclosing part 2-3 arranged on the front and rear sides of the top plate 2-1, which is integrally connected to the top plate 2-1 and bent downward, and the top plate 2-1, the supporting connection part 2-2 and the enclosing part 2-3 surround and form an installation cavity 1 for installing the vibration sensing part 3; further, the supporting connection part 2-2 in this embodiment includes a supporting plate 2-2-1 bent downward and a welding fixing plate 2-2-2 arranged at the lower end of the support plate 2-2-1 and bent outward, the support plate 2-2-1 in this embodiment is perpendicular to the top plate 2-1, and the welding fixing plate 2-2-2 is perpendicular to the support plate 2-2-1.

[0023] Furthermore, Figure 2 and Figure 3As shown, in order to improve the sensitivity consistency of the vibration sensor in this embodiment during mass production, the vibration sensing part 3 in this embodiment includes a fixed part 3-1 that is contact-limited on the inner wall of the installation cavity 1 for receiving vibration, a connecting part 3-2 that is located in the installation cavity 1 and connected to the fixed part 3-1 for transmitting vibration, and an elastic deformation part 3-3 that is connected to the connecting part 3-2, arranged opposite to the fixed part 3-1, and suspended in the installation cavity 1; as shown in FIG. Figure 3 As shown, the elastic deformation part 3-3 in this embodiment can be a cylindrical spring and is horizontally arranged in the installation cavity 1; at the same time, in order to facilitate the processing and strength of the vibration sensing part 3, the fixed part 3-1, the connecting part 3-2 and the elastic deformation part 3-3 in this embodiment can be integrally formed, so that the fixed part 3-1 is a cylindrical spring with a larger diameter, the elastic deformation part 3-3 is a cylindrical spring with a smaller diameter and is concentrically arranged with the fixed part 3-1, and the connecting part 3-2 is a conical spring connecting the fixed part 3-1 and the elastic deformation part 3-3; a conductive part 4 is provided on the inner wall of the sensor housing 2 to fix the fixed part 3-1 on the sensor housing 2; the fixed part 3-1 in this embodiment contacts the inner wall of the installation cavity 1, and then when the vibration sensing part 3 is assembled, the vibration sensing part 3 is positioned in the installation cavity 1 through the fixed part 3-1, so that when the vibration sensor in this embodiment is mass-produced, the position of the vibration sensing part 3 in different vibration sensors is fixed, so that the sensitivity consistency of the mass-produced vibration sensors is better when used.

[0024] During installation, the sensor housing 2 is welded to the upper end of the circuit board 9 with a pair of poles 10 through the welding fixing plate 2-2-2. When the sensor housing 2 is made of conductive material, the fixing portion 3-1 is fixedly connected to the sensor housing 2 through the conductive portion 4. In order to make assembly more convenient, the welding fixing plate 2-2-2 in the sensor housing 2 can be directly welded to the circuit board 9 and contact one of the poles 10 for conductivity, and the elastic deformation portion 3-3 is located above the other pole 10; when the sensor housing 2 is made of insulating material, the conductive portion 4 can be extended to the lower end of the welding fixing plate 2-2-2, thereby When the device is installed, the fixing plate 2-2-2 is welded to the circuit board 9, and the conductive part 4 at the lower end of the welding fixing plate 2-2-2 is in contact with one of the poles 10 on the circuit board 9, and the elastic deformation part 3-3 is also located above the other pole 10; when the vibration sensor senses vibration, the sensor housing 2 vibrates and then transmits the vibration to the fixing part 3-1 and the connecting part 3-2, and the connecting part 3-2 finally transmits the vibration to the suspended elastic deformation part 3-3, so that the elastic deformation part 3-3 vibrates and contacts the pole 10 below, thereby realizing the connection between the two poles 10 on the circuit board 9.

[0025] Specifically, Figure 2 and Figure 4As shown, the front and rear sides of the fixing part 3-1 in the vibration sensing part 3 of this embodiment are respectively contacted and limited with the inner walls of the front and rear surrounding parts 2-3, and the side of the fixing part 3-1 away from the connecting part 3-2 is contacted and limited with the inner wall of the supporting connecting part 2-2, so that the fixing part 3-1 is limited in the front and rear directions by the front and rear surrounding parts 2-3, thereby making the positioning of the vibration sensing part 3 in this embodiment more accurate during assembly.

[0026] Furthermore, Figure 1 and Figure 2 As shown, in order to further improve the positioning accuracy of the vibration sensing part 3 in this embodiment, in this embodiment, a protrusion 5 protruding toward the installation cavity 1 and located outside the fixing part 3-1 for limiting the fixing part 3-1 to move leftward is provided on the front and rear surrounding parts 2-3, thereby limiting the fixing part 3-1 on the vibration sensing part 3 in the left and right directions through the protrusion 5 and the supporting connection part 2-2; at the same time, as Figure 1 and Figure 4 As shown, in this embodiment, a pair of positioning parts 7 protruding into the mounting cavity 1 are provided on the top plate 2-1, and the positioning parts 7 are located on the front and rear sides of the elastic deformation part 3-3 for positioning the elastic deformation part 3-3; specifically, the distance between the front and rear positioning parts 7 is smaller than the diameter of the elastic deformation part 3-3; when the vibration sensing part 3 in the vibration sensor is assembled, the sensor housing 2 is turned over so that the mounting cavity 1 is set upward, and then the vibration sensing part 3 is placed into the mounting cavity 1 from top to bottom, so that the outer end of the fixed part 3-1 of the vibration sensing part 3 is in contact with the supporting connection part 2-2, so that the fixed part 3-1 is limited between the protrusion 5 and the supporting connection part 2-2, and at the same time, a pair of positioning parts 7 are respectively located on the front and rear sides of the lower end of the elastic deformation part 3-3 to support and limit the elastic deformation part 3-3, so that the elastic deformation part 3-3 is positioned by the positioning parts 7, and finally the fixed connection between the fixed part 3-1 and the sensor housing 2 is realized by the conductive glue, so as to realize the accurate installation of the position of the vibration sensing part 3.

[0027] Furthermore, Figure 4 As shown, the conductive part 4 in this embodiment is a conductive glue arranged on the sensor housing 2. In order to limit the flow of the conductive glue, a limiting step 6 is provided on the top plate 2-1 in this embodiment, which protrudes into the installation cavity 1 and is located outside the fixing part 3-1.

[0028] Furthermore, the vibration sensor in the present embodiment can be formed by stamping and bending a metal sheet. First, a top plate 2-1, a supporting connection portion 2-2 connected to the top plate 2-1, and a surrounding portion 2-3 are punched out on the sheet 11 to form a semi-finished product 12 before bending. At the same time, in order to connect the punched semi-finished product 12 with the entire sheet 11 to prevent the semi-finished product 12 from falling, a process channel 8 is provided on the surrounding portion 2-3 from top to bottom in the present embodiment, so that when the surrounding portion 2-3 is punched, the center connection portion 13 corresponding to the process channel 8 is connected to the top plate 2-1 and the sheet 11, thereby avoiding the connection between the semi-finished product 12 and the sheet 11, facilitating the subsequent batch bending of the supporting connection portion 2-2 and the surrounding portion 2-3. After the supporting connection portion 2-2 and the surrounding portion 2-3 are bent, the final punching is performed to cut the center connection portion 13 close to the top plate 2-1, thereby separating the bent sensor housing 2 from the sheet 11 for final assembly.

[0029] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A simple vibration sensor, comprising a sensor housing (2) having a mounting cavity (1) formed therein, and a vibration sensing portion (3) mounted in the mounting cavity (1) for conductive connection, wherein: The vibration sensing part (3) comprises a fixing part (3-1) contact-limited on the inner wall of the installation cavity (1) for receiving vibration, a connecting part (3-2) located in the installation cavity (1) and connected to the fixing part (3-1) for transmitting vibration, and an elastic deformation part (3-3) connected to the connecting part (3-2) and arranged opposite to the fixing part (3-1) and suspended in the installation cavity (1). A conductive part (4) is provided on the inner wall of the sensor housing (2) for fixing the fixing part (3-1) to the sensor housing (2).

2. A simple vibration sensor according to claim 1, characterized in that: The sensor housing (2) comprises a top plate (2-1), a supporting connection portion (2-2) arranged on the left and right sides of the top plate (2-1), integrally connected to the top plate (2-1) and bent downward, and an enclosing portion (2-3) arranged on the front and rear sides of the top plate (2-1), integrally connected to the top plate (2-1) and bent downward, wherein the top plate (2-1), the supporting connection portion (2-2) and the enclosing portion (2-3) enclose the mounting cavity (1), the front and rear sides of the fixing portion (3-1) are respectively contacted with the front and rear inner walls of the enclosing portion (2-3) for position limiting, and the side of the fixing portion (3-1) away from the connection portion (3-2) is contacted with the inner wall of the supporting connection portion (2-2) for position limiting.

3. A simple vibration sensor according to claim 2, characterized in that: The front and rear surrounding parts (2-3) are both provided with a protruding part (5) which protrudes toward the installation cavity (1) and is located outside the fixing part (3-1) and is used to limit the fixing part (3-1) from moving leftward.

4. A simple vibration sensor according to claim 2, characterized in that: The supporting connection portion (2-2) comprises a supporting plate (2-2-1) bent downward and a welding fixing plate (2-2-2) arranged at the lower end of the supporting plate (2-2-1) and bent outward.

5. A simple vibration sensor according to claim 2, characterized in that: The conductive part (4) is a conductive glue arranged on the sensor housing (2), and the top plate (2-1) is provided with a limiting step (6) protruding into the installation cavity (1) and located outside the fixing part (3-1) for limiting the flow of the conductive glue.

6. A simple vibration sensor according to claim 2, characterized in that: The elastic deformation part (3-3) is a cylindrical spring and is arranged horizontally in the installation cavity (1); the top plate (2-1) is provided with a pair of positioning parts (7) protruding into the installation cavity (1); the positioning parts (7) are located at the front and rear sides of the elastic deformation part (3-3) and are used to position the elastic deformation part (3-3).

7. A simple vibration sensor according to claim 2, characterized in that: The surrounding portion (2-3) is provided with a process channel (8) which passes through the surrounding portion (2-3) from top to bottom.

8. A simple vibration sensor according to claim 1 or 6, characterized in that: The fixing portion (3-1), the connecting portion (3-2) and the elastic deformation portion (3-3) are integrally formed.

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