Inertia switch with in-place self-locking function

Abstract

The invention discloses an inertia switch with an in-place self-locking function, and belongs to the technical field of inertia switches, the inertia switch comprises a shell, an inertia body, a switch part, an elastic piece, a limiting ball and a pressing screw, the non-conductive shell is provided with a stepped hole and an inclined hole, and the non-conductive pressing screw seals the inertia body, the elastic piece and the switch part in the stepped hole. The inclined hole communicated with the small-diameter section is used for accommodating the limiting ball, the fixed end of the power connection piece of the switch component is located on the outer side of the inertia body, and the elastic piece abuts against the position between the inertia body and the pressing screw; in the initial state, the elastic piece separates the conductive inertia body from the power connection pieces, and meanwhile, the small cylinder of the inertia body is located in the small-diameter section to seal the limiting ball in the inclined hole. The inertia body can move in the direction close to the pressing screw under the overload effect so as to abut against the power connection pieces and switch on the switch component, and when the inertia body moves in the direction close to the cover plate till the small cylinder relieves constraint on the limiting ball, the limiting ball moves into the small-diameter section, and limiting constraint on rebounding of the inertia body is formed.

Description

Technical Field

[0001] This invention belongs to the field of inertial switch technology, specifically relating to an inertial switch with a self-locking function at position. Background Technology

[0002] Inertial switches have a wide range of applications in aerospace, automotive electronics, and ammunition. Generally, an inertial switch closes by utilizing the reaction force or forward inertia of a carrier impacting a target, thus switching the circuit from open to closed. Inertial switches are also widely used in fuses, especially electromechanical fuses, and are crucial components for triggering detonation or self-destruction upon impact.

[0003] In the applicant's earlier patent application CN202211446167.1, a high-threshold inertial switch that can provide an impact signal was proposed. This switch utilizes a steel ball that senses an overload and overcomes spring resistance to contact the core electrode, thus achieving switch activation. However, the aforementioned inertial switch typically suffers from unreliable contact. At the moment of impact between the mass block and the contact, the mass block may bounce off, and after the overload disappears, the inertial switch usually returns to its original state under the action of spring resistance, lacking a locking function.

[0004] To address the lack of self-locking functionality in inertial switches, the applicant further proposed a self-locking inertial switch (application number: CN201911175240.4). Through the corresponding arrangement of an inertial body, an inertial spring, a stationary electrode, and a locking pin and locking ball within the housing, it effectively achieves reliable and stable connection of the inertial switch. It also ensures that after the two stationary electrodes are connected by the inertial body, the inertial body can be locked in place by the locking pin and locking ball, preventing the inertial body from detaching from the stationary electrode due to the spring's rebound. However, in practical use, this self-locking inertial switch has the following problems: (1) After being impacted and rebounded by an inertial body, the static electrode cannot return to its original state, resulting in unreliable contact between the inertial body and the static electrode. (2) When the inertial body rebounds after the overload disappears, it may sometimes squeeze out the uppermost steel ball, resulting in unreliable contact between the inertial body and the static electrode. (3) The self-locking inertial switch structure of this invention is relatively complex, which is not conducive to the miniaturization of the switch. Summary of the Invention

[0005] In view of one or more of the above-mentioned defects or improvement needs of the prior art, the present invention provides an inertial switch with a self-locking function, which can ensure that the switch components constituting the switch structure and the inertial body maintain reliable contact after collision and rebound.

[0006] To achieve the above objectives, the present invention provides an inertial switch with a self-locking function, comprising a housing, an inertial body, a switching component, an elastic element, a limiting ball, and a pressure screw; the housing and the pressure screw are made of non-conductive material; The housing is provided with a stepped hole and an oblique hole; the stepped hole includes a large diameter section and a small diameter section, the small diameter section is a blind hole, the large diameter section is a through hole, the stepped hole is used to accommodate the inertial body and the elastic element, and a pressure screw is connected to the opening of the stepped hole; one end of the oblique hole is connected to the small diameter section, and the other end extends away from the large diameter section, the oblique hole is used to accommodate the limiting ball; The inertial body is made of conductive material, and one end of the inertial body is provided with a small cylinder that can extend into the small diameter section; the elastic element is provided between the pressure screw and the inertial body, with one end abutting against the pressure screw and the other end abutting against the inertial body. The switching component includes at least two spaced-apart contact plates, which are made of a material with conductivity and elastic recovery capability. One end of each contact plate is connected to the side wall of the large-diameter section, and the other end extends towards the pressure screw to the space between the inertial body and the pressure screw. In the initial state, the elastic element abuts the inertial body against the housing to separate the inertial body from the contact piece. At this time, the small cylinder is located in the small diameter section, sealing the limiting ball in the oblique hole, and the distance between the top surface of the small cylinder and the top surface of the small diameter section is less than the diameter of the limiting ball. Under overload, the inertial body can move towards the pressure screw to abut against each of the contact pieces and turn on the switching component. When the inertial body moves towards the pressure screw until the small cylinder releases the constraint on the limiting ball, the limiting ball moves along the oblique hole into the small diameter section to form a limiting constraint on the rebound of the inertial body, so that the inertial body still maintains contact with the contact piece after the overload disappears / decreases.

[0007] As a further improvement of the present invention, the connection between the oblique hole and the small diameter section is located on the side wall of the small diameter section.

[0008] As a further improvement of the present invention, the inertial body is a stepped cylindrical structure, including the small cylinder and the large cylinder, and the end of the large cylinder facing the pressure screw has a blind hole for accommodating the elastic element.

[0009] As a further improvement of the present invention, each of the electrical contact pieces includes a working part, an inclined part, a vertical part and a horizontal part connected in sequence. The horizontal part is used to connect with the side wall of the large-diameter section. The vertical part is located outside the outer wall surface of the inertial body. The inclined part sends the working part between the inertial body and the pressure screw.

[0010] As a further improvement of the present invention, when the inertial body connects the switching component, the inertial body abuts against each of the contact plates with its side wall surface.

[0011] As a further improvement of the present invention, the switching component further includes power-connecting studs that correspond one-to-one with each of the connecting pieces; The side wall of the large-diameter section is provided with a plurality of side holes for accommodating each of the horizontal portions, and the housing is provided with a groove communicating with each of the side holes, so that each of the power-connecting studs can install the horizontal portion of each of the power-connecting plates in the side holes.

[0012] As a further improvement of the present invention, each of the side holes penetrates the side wall of the large-diameter section, which facilitates the processing of the side holes; the housing is provided with an external sealant corresponding to each of the side holes to provide insulation protection for the contact plate and the contact stud.

[0013] As a further improvement of the present invention, the end of the oblique hole away from the large diameter section penetrates the housing, and a screw plug is provided in the oblique hole to seal the limiting ball in the oblique hole.

[0014] As a further improvement of the present invention, the contact plate is integrally machined from beryllium bronze sheet; and / or, the thickness of the contact plate is 0.5mm~0.8mm; and / or, the inertial body is made of copper material.

[0015] As a further improvement of the present invention, the switching component includes several sets of circuit switches, and each set of circuit switches includes two of the aforementioned contact plates.

[0016] The aforementioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0017] In summary, the beneficial effects of the above-described technical solutions conceived by this invention compared with the prior art include: (1) The inertial switch with self-locking function of the present invention includes a housing, an inertial body, a switching component, an elastic element, a limiting ball, and a pressure screw. The non-conductive housing has a stepped hole and an oblique hole. The non-conductive pressure screw encloses the inertial body, the elastic element, and the switching component in the stepped hole. The small cylinder of the inertial body can extend into the small diameter section of the stepped hole and can seal the limiting ball in the oblique hole communicating with the small diameter section. The fixed end of the contact plate of the switching component is located outside the inertial body, and the elastic element abuts between the inertial body and the pressure screw. In the initial state, the elastic element... The inertial element separates the conductive inertial body from each contact plate, while the small cylinder of the inertial body encloses the limiting ball within the oblique hole. Under overload, the inertial body can move towards the pressure screw to abut against each contact plate, activating the switch component. When the inertial body moves towards the cover plate until the small cylinder releases the constraint on the limiting ball, the limiting ball moves along the oblique hole into the small diameter section, forming a limiting constraint on the rebound of the inertial body. This locks the inertial body in a specific position after the overload disappears or decreases, maintaining contact with the contact plates. In this inertial-based safety control switch, the contact plates of the switch part are distributed on the side of the inertial body. When the inertial body is subjected to overload and impacts the contact plates, each contact plate expands away from the inertial body after contact to avoid the impact. This ensures that when the inertial body reaches its position, the contact plates undergo only a small elastic deformation, gradually recovering their deformation as the inertial body rebounds, thus maintaining reliable contact with the inertial body.

[0018] (2) The inertial switch with positioning self-locking function of the present invention sets the connection between the inclined hole and the small diameter section on the side wall of the small diameter section, so that there is a part of the side wall of the small diameter section on the connection part. This part of the side wall of the small diameter section forms a limit on the inertial body that abuts against the top surface of the small diameter section, preventing the limiting ball from being squeezed back into the inclined hole, and can effectively lock the limiting ball between the top surface of the small diameter section and the top surface of the small cylinder.

[0019] (3) The inertial switch with positioning self-locking function of the present invention sets the inertial body as a stepped cylindrical structure and opens a blind hole at the end of the large cylinder facing the pressure screw to accommodate the elastic element. On the one hand, it can guide the compression deformation of the elastic element, and on the other hand, it can shorten the vertical space occupied by both and reduce the vertical length required by the shell, so as to reduce the size of the inertial switch.

[0020] (4) The inertial switch with positioning self-locking function of the present invention is configured by setting the contact piece as a working part, an inclined part, a vertical part and a horizontal part connected in sequence. The horizontal part is used to connect with the side wall of the large diameter section, so that the L-shaped structure formed by the horizontal part and the vertical part can be tightly fastened to the side wall of the large diameter section, so as to ensure that the contact piece is stably installed on the side wall of the large diameter section; further restricting the side wall surface of the inertial body from contacting the contact piece when the inertial body contacts the contact piece, so that the bottom end surface of the inertial body will not impact the contact piece, thereby reducing the impact of the inertial body on the contact piece, so that the contact piece only undergoes a small elastic deformation under the action of the inertial body, ensuring that the contact piece can recover its deformation and maintain stable contact with the inertial body when rebounding.

[0021] (5) The inertial switch of the present invention with positioning self-locking function has a compact structure and is easy to assemble. It can ensure that the switch components constituting the switch structure and the inertial body still maintain reliable contact after collision rebound. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a cross-sectional view of the portion containing the contact plate in the initial state of the inertial switch with positioning self-locking function in an embodiment of the present invention. Figure 2 This is a cross-sectional view of the initial state of the inertial switch with positioning self-locking function in an embodiment of the present invention, including the portion with the oblique hole; Figure 3 This is a cross-sectional view of the portion containing the contact piece in the positioned state of an inertial switch with a self-locking function in an embodiment of the present invention. Figure 4 This is a cross-sectional view of the portion containing the oblique hole in the in-position state of the inertial switch with self-locking function in an embodiment of the present invention; Figure 5 This is a cross-sectional view of the portion containing the contact plate in the retracted state of the inertial switch with positioning self-locking function in an embodiment of the present invention. Figure 6 This is a cross-sectional view of the portion containing the oblique hole in the retracted state of the inertial switch with positioning self-locking function in an embodiment of the present invention. Figure 7 This is a cross-sectional view of the housing of an inertial switch with a self-locking function in position according to an embodiment of the present invention; In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1. Housing; 11. Small diameter section; 12. Large diameter section; 13. Slanted hole; 14. Side hole; 15. Groove; 2. Inertial body; 21. Small cylinder; 22. Large cylinder; 3. Switching component; 31. Electrical contact piece; 311. Working part; 312. Inclined part; 313. Vertical part; 314. Horizontal part; 32. Electrical contact stud; 4. Elastic element; 5. Limiting ball; 6. Press screw; 7. Plug. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0025] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] Example: Please see Figures 1-6 The inertial switch with self-locking function in a preferred embodiment of the present invention includes: a housing 1, an inertial body 2, a switch component 3, an elastic element 4, a limiting ball 5, and a pressure screw 6. The housing 1 and the pressure screw 6 are made of non-conductive material; the inertial body 2, used to connect the switch component 3, is made of conductive material; for example, the inertial body 2 can be made of copper, which has good conductivity; the limiting ball 5 is preferably a steel ball.

[0030] Specifically, the housing 1 is provided with a stepped hole and an oblique hole 13; the stepped hole includes a large diameter section 12 and a small diameter section 11, the small diameter section 11 is a blind hole, the large diameter section 12 is a through hole, the stepped hole is used to accommodate the inertial body 2 and the elastic element 4, and a pressure screw 6 is connected to the opening of the stepped hole; one end of the oblique hole 13 is connected to the small diameter section 11, and the other end extends away from the large diameter section 12, the oblique hole 13 is used to accommodate the limiting ball 5, and the axis of the oblique hole 13 forms a certain angle with the axis of the small diameter section 11; The switch component 3 includes at least two spaced-apart contact pieces 31. The contact pieces 31 are made of a material with conductivity and elastic recovery capability. One end of each contact piece 31 is connected to the sidewall of the large-diameter section 12, and the other end extends towards the pressure screw 6 between the inertial body 2 and the pressure screw 6. Preferably, the contact piece 31 is integrally machined from beryllium bronze sheet, as beryllium bronze has good conductivity and a high elastic limit. Further, the thickness of the contact piece 31 is preferably 0.5mm to 0.8mm to ensure sufficient elastic recovery capability.

[0031] One end of the inertial body 2 is provided with a small cylinder 21 that can extend into the small diameter section 11, and the size of the small cylinder 21 is preferably matched with the small diameter section 11. The elastic element 4 is provided between the pressure screw 6 and the inertial body 2, with one end abutting against the pressure screw 6 and the other end abutting against the inertial body 2.

[0032] The operation process of the safety control switch in this preferred embodiment is as follows: In the initial state, such as Figure 1 and Figure 2As shown, the elastic element 4 abuts the inertial body 2 against the top surface of the large-diameter section 12 to separate the inertial body 2 from the contact piece 31. At this time, the small cylinder 21 of the inertial body 2 is located in the small-diameter section 11, sealing the limiting ball 5 in the oblique hole 13, and the distance between the top surface of the small cylinder 21 and the top surface of the small-diameter section 11 is less than the diameter of the limiting ball 5; then, when the inertial body 2 moves towards the pressure screw 6 under overload and abuts each contact piece 31, the switch component 3 is turned on; further, as Figure 3 and Figure 4 As shown, when the inertial body 2 moves towards the pressure screw 6 to its final position, the top surface of the small cylinder 21 is below the inclined hole 13. The small cylinder 21 releases the constraint on the limiting ball 5 in the inclined hole 13, and the limiting ball 5 moves along the inclined hole 13 to the small diameter section 11, landing on the top surface of the small cylinder 21. After the overload disappears or decreases, the limiting ball 5 and the inertial body 2 move away from the pressure screw 6 under the drive of the elastic element 4 until the limiting ball 5 abuts against the top surface of the small diameter section 11 or the large diameter section 12, forming a limiting constraint on the rebound of the inertial body 2, as shown. Figure 5 and Figure 6 As shown, the inertial body 2 can no longer move towards the small diameter section 11, thus forming a self-locking state. At this time, the distance between the top surface of the small cylinder 21 of the inertial body 2 and the top surface of the small diameter section 11 is at least the diameter of the limiting ball 55. The inertial body 2 is closer to the contact piece 31 than in the initial state and still maintains contact with the contact piece 31, so that the switch component 3 remains in the on state.

[0033] In this preferred embodiment, the contact plates 31 of the switch are distributed on the side of the inertial body 2. When the inertial body 2 is subjected to overload and rushes towards the contact plates 31, each contact plate 31 will expand in the direction away from the inertial body 2 after contacting the inertial body 2 to avoid the impact of the inertial body 2. This allows the contact plates 31 to undergo only a small elastic deformation when the inertial body 2 moves to its position. They can gradually recover their deformation as the inertial body 2 rebounds, so as to maintain reliable contact with the inertial body 2.

[0034] In a preferred embodiment, the oblique hole 13 can be a blind hole communicating with the small diameter section 11, or the oblique hole 13 can be a through hole, so as to facilitate the machining of the oblique hole 13 on the housing 1.

[0035] For example, when the oblique hole 13 is a through hole leading to the outer wall of the housing 1, a screw plug 7 is preferably provided in the oblique hole 13 to seal the limiting ball 5 in the oblique hole 13 and prevent the limiting ball 5 from being thrown out under the action of external force.

[0036] More preferably, the connection between the oblique hole 13 and the small diameter section 11 is located on the side wall of the small diameter section 11, that is, the top surface of the small diameter section 11 is higher than the bottom outlet of the oblique hole 13. Above the connection between the oblique hole 13 and the small diameter section 11, there is also a part of the side wall of the small diameter section 11. This part of the side wall of the small diameter section 11 forms a limit on the inertial body 2 that abuts against the top surface of the small diameter section 11, preventing the limiting ball 5 from being squeezed back into the oblique hole 13, and can effectively lock the limiting ball 5 between the top surface of the small diameter section 11 and the top surface of the small cylinder 21.

[0037] Preferably, the elastic element 4 is a spring. The elastic element 4 is initially in a compressed state, and its resistance in the initial state is greater than or equal to the weight of the inertial body 2, ensuring that the elastic element 4 abuts the inertial body 2 against the top surface of the large-diameter section 12. In actual installation, the resistance F of the elastic element 4 is equal to the mass of the inertial body 2. m The relationship between them can be set according to actual needs. For example, if switch component 3 is only turned on after the target is hit, then F / m =2000m / s 2 ~3000m / s 2 If the overload is released in the air, then F / m =50m / s 2 ~80m / s 2 .

[0038] Preferably, the inertial body 2 is a stepped cylindrical structure, including a small cylinder 21 and a large cylinder 22. The large cylinder 22 has a blind hole at one end facing the pressure screw 6 to accommodate the elastic element 4. On the one hand, it can guide the compression deformation of the elastic element 4. On the other hand, by extending the elastic element 4 into the interior of the inertial body 2, the vertical space occupied by the two can be shortened, the vertical length required by the housing 1 can be reduced, and the size of this inertial switch can be reduced.

[0039] More preferably, each contact piece 31 includes a working part 311, an inclined part 312, a vertical part 313, and a horizontal part 314 connected in sequence. The horizontal part 314 is used to connect with the side wall of the large-diameter section 12, the vertical part 313 is located on the outer side of the outer wall surface of the inertial body 2, and the inclined part 312 feeds the working part 311 between the inertial body 2 and the pressure screw 6. In this preferred embodiment, the horizontal part 314 and the vertical part 313 of the contact piece 31 form an L-shaped structure and are tightly fastened to the side wall of the large-diameter section 12. The vertical part 313 is preferably in contact with the side wall surface of the large-diameter section 12 to ensure that the contact piece 31 is stably installed on the side wall of the large-diameter section 12.

[0040] Preferably, when the inertial body 2 connects to the switch component 3, the inertial body 2 abuts against each contact piece 31 with its side wall surface. In this preferred embodiment, when the inertial body 2 moves toward the pressure screw 6, the inertial body 2 abuts against the inclined part 312 and the working part 311 with its side wall surface in turn, pushing the contact pieces 31 outward, while the bottom end surface of the inertial body 2 will not impact the contact pieces 31, thereby reducing the impact of the inertial body 2 on the contact pieces 31, so that the contact pieces 31 only undergo small elastic deformation under the action of the inertial body 2, ensuring that the contact pieces 31 can recover their deformation and maintain stable contact with the inertial body 2 when rebounding.

[0041] Preferably, the switch component 3 further includes power-connecting studs 32 corresponding to each connecting piece; the side wall of the large-diameter section 12 is provided with a plurality of side holes 14 for accommodating each horizontal part 314, such as... Figure 7 As shown, the housing 1 is provided with grooves 15 communicating with each side hole 14, so that each power-connecting stud 32 can install the horizontal portion 314 of each power-connecting piece 31 in the side hole 14. In this embodiment, the power-connecting stud 32 passes through the groove 15 to fix the horizontal portion 314 located in the side hole 14 to the side wall of the large-diameter section 12. The power-connecting stud 32 is preferably threaded to the side wall of the large-diameter section 12. The power-connecting stud 32 serves two purposes: conducting electricity and fixing the power-connecting piece 3131 to the housing 1. Specifically, a wire is connected to the power-connecting stud 32. The wire extends out of the housing 1 along the groove 15. The wire is used to connect to the control circuit, so that the switch component 3 can safely control the control circuit. Preferably, the power-connecting stud 32 is made of an aluminum rod with good conductivity.

[0042] Preferably, each side hole 14 penetrates the side wall of the large-diameter section 12, which facilitates the machining of each side hole 14 on the housing 1; the housing 1 is provided with an external sealant corresponding to each side hole 14 to provide insulation protection for the electrode plate 31 and the electrode stud 32.

[0043] Preferably, the switching component 3 includes several sets of circuit switches, each set of circuit switches including two contact pieces 31, so that the inertial switch can simultaneously perform safety control on several circuits. Specifically, preferably, each contact piece 31 is evenly distributed along the circumference of the large diameter section 12, and two adjacent contact pieces 31 form a set of circuit switches.

[0044] The inertial switch with self-locking function in this invention has a compact structure and is easy to assemble. It can ensure that the switch component 3 constituting the switch structure and the inertial body 2 maintain reliable contact after collision and rebound.

[0045] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An inertial switch with a self-locking function at position, characterized in that, It includes a housing, an inertial body, a switching component, an elastic element, a limiting ball, and a pressure screw; the housing and the pressure screw are made of non-conductive material; The housing is provided with a stepped hole and an oblique hole; the stepped hole includes a large diameter section and a small diameter section, the small diameter section is a blind hole, the large diameter section is a through hole, the stepped hole is used to accommodate the inertial body and the elastic element, and a pressure screw is connected to the opening of the stepped hole; one end of the oblique hole is connected to the small diameter section, and the other end extends away from the large diameter section, the oblique hole is used to accommodate the limiting ball; The inertial body is made of conductive material, and one end of the inertial body is provided with a small cylinder that can extend into the small diameter section; the elastic element is provided between the pressure screw and the inertial body, with one end abutting against the pressure screw and the other end abutting against the inertial body. The switching component includes at least two spaced-apart contact plates, which are made of a material with conductivity and elastic recovery capability. One end of each contact plate is connected to the side wall of the large-diameter section, and the other end extends towards the pressure screw to the space between the inertial body and the pressure screw. In the initial state, the elastic element abuts the inertial body against the housing to separate the inertial body from the contact piece. At this time, the small cylinder is located in the small diameter section, sealing the limiting ball in the oblique hole, and the distance between the top surface of the small cylinder and the top surface of the small diameter section is less than the diameter of the limiting ball. Under overload, the inertial body can move towards the pressure screw to abut against each of the contact pieces and turn on the switching component. When the inertial body moves towards the pressure screw until the small cylinder releases the constraint on the limiting ball, the limiting ball moves along the oblique hole into the small diameter section to form a limiting constraint on the rebound of the inertial body, so that the inertial body still maintains contact with the contact piece after the overload disappears / decreases.

2. The inertia-based safety control switch according to claim 1, characterized in that, The connection between the inclined hole and the small diameter section is located on the side wall of the small diameter section.

3. The inertia-based safety control switch according to claim 1, characterized in that, The inertial body is a stepped cylindrical structure, including a small cylinder and a large cylinder. The large cylinder has a blind hole at one end facing the pressure screw to accommodate the elastic element.

4. The inertia-based safety control switch according to claim 1, characterized in that, Each of the aforementioned contact plates includes a working part, an inclined part, a vertical part, and a horizontal part connected in sequence. The horizontal part is used to connect with the side wall of the large-diameter section. The vertical part is located outside the outer wall surface of the inertial body. The inclined part sends the working part between the inertial body and the pressure screw.

5. The inertia-based safety control switch according to claim 4, characterized in that, When the inertial body connects the switching component, the inertial body abuts against each of the contact plates with its sidewall surface.

6. The inertia-based safety control switch according to claim 4, characterized in that, The switching component also includes power-connecting studs that correspond one-to-one with each of the connecting pieces; The side wall of the large-diameter section is provided with a plurality of side holes for accommodating each of the horizontal portions, and the housing is provided with a groove communicating with each of the side holes, so that each of the power-connecting studs can install the horizontal portion of each of the power-connecting plates in the side holes.

7. The inertia-based safety control switch according to claim 6, characterized in that, Each of the side holes penetrates the sidewall of the large-diameter section, facilitating the machining of the side holes; the housing is provided with an external sealant corresponding to each of the side holes to provide insulation protection for the contact plate and the contact stud.

8. The inertia-based safety control switch according to any one of claims 1 to 7, characterized in that, The end of the oblique hole away from the large diameter section penetrates the housing, and a screw plug is provided in the oblique hole to seal the limiting ball inside the oblique hole.

9. The inertia-based safety control switch according to any one of claims 1 to 7, characterized in that, The contact plate is integrally machined from beryllium bronze sheet; and / or, the thickness of the contact plate is 0.5mm~0.8mm; and / or, the inertial body is made of copper.

10. The inertia-based safety control switch according to any one of claims 1 to 7, characterized in that, The switching component includes several sets of circuit switches, and each set of circuit switches includes two of the aforementioned contact plates.

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