Safety control switch based on inertia

Abstract

The invention discloses an inertia-based safety control switch, and belongs to the technical field of inertia switches, the inertia-based safety control switch comprises a shell, an inertia body, a switch part, an elastic piece, a limiting ball and a cover plate, the non-conductive shell is provided with a large-diameter section and a small-diameter section which are communicated, and the limiting ball, the inertia body, the elastic piece and the switch part are sealed in the shell by the non-conductive cover plate; the limiting ball is located in the small-diameter section, the inertia body, the elastic piece and the switch component are located in the large-diameter section, and the elastic piece is connected between the inertia body and the cover plate in an abutting mode; in an initial state, the elastic member separates the conductive inertia body from the power connection sheet of the switch component, and the arc-shaped boss of the inertia body seals the limiting ball in the small-diameter section. The inertia body can move towards the direction close to the cover plate 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 towards the direction close to the cover plate to the arc-shaped boss to relieve constraint on the limiting ball, the limiting ball moves to the periphery of the arc-shaped boss, 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-based safety control switch. Background Technology

[0002] Fuze safety is an important principle in fuze design. To ensure fuze safety, two levels of safety are usually designed. The disarming of the two levels of safety can be achieved by environmental excitation or by the control system issuing a disarming command. In particular, for the latter, if a false triggering command is issued during ground testing, it is easy to cause the safety to be accidentally disarmed, increasing the safety risk of the fuze. Summary of the Invention

[0003] In response to one or more of the above-mentioned defects or improvement needs of the prior art, the present invention provides an inertia-based safety control switch that can issue a release command to the connected control system for safety control, thereby eliminating the risks of ground testing.

[0004] To achieve the above objectives, the present invention provides an inertia-based safety control switch, comprising a housing, an inertial body, a switching component, an elastic element, a limiting ball, and a cover plate; the housing and the cover plate are made of non-conductive materials; The housing has a stepped hole, which includes a large diameter section and a small diameter section. The small diameter section is a blind hole, and the large diameter section is a through hole. The small diameter section is used to accommodate a limiting ball, and the large diameter section is used to accommodate the inertial body and the elastic element. A cover plate is connected to the opening of the stepped hole. The inertial body is made of conductive material, and one end of the inertial body is provided with an arc-shaped boss that can extend into the small diameter section. 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 is located between the cover plate and the inertial body. The elastic element is disposed between the cover plate and the inertial body, with one end abutting against the cover plate and the other end abutting against the inertial body; In the initial state, the elastic member abuts the inertial body against the housing to separate the inertial body from the contact piece. At this time, the arc-shaped boss encloses the limiting ball in the small diameter section, and the distance between the end of the inertial body away from the limiting ball and each of the contact pieces is less than the diameter of the limiting ball. Under overload, the inertial body can move towards the cover plate to abut against each of the contact plates and turn on the switch component; and when the inertial body moves towards the cover plate until the arc-shaped boss releases the constraint on the limiting ball, the limiting ball moves along the arc surface of the arc-shaped boss to the periphery of the arc-shaped boss, forming a limiting constraint on the rebound of the inertial body.

[0005] As a further improvement of the present invention, the inertial body has a blind hole at one end facing the cover plate for accommodating the elastic element.

[0006] As a further improvement of the present invention, each of the electrical contact plates includes a working part, a transition part and a fixing part connected in sequence, the fixing plate is used to connect with the side wall of the large diameter section, and the transition part is bent toward the inertial body.

[0007] As a further improvement of the present invention, the switch component further includes a stud corresponding to each of the contact pieces, for connecting the fixing part of each contact piece to the opening of the stepped hole.

[0008] As a further improvement of the present invention, the opening of the stepped hole is provided with a groove corresponding to each fixing part for accommodating the fixing part; and / or, the side wall of the large diameter section is provided with a channel corresponding to each of the power connecting studs so that the end of each power connecting stud away from the fixing plate passes through the housing and connects to the wire.

[0009] As a further improvement of the present invention, the power-connecting stud also connects the cover plate to the opening of the stepped hole.

[0010] As a further improvement of the present invention, the power-connecting stud is made of an aluminum rod.

[0011] 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.

[0012] 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.

[0013] As a further improvement of the present invention, each contact piece is evenly distributed around the perimeter of the cover plate, and two adjacent contact pieces constitute a set of circuit switches.

[0014] The aforementioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0015] In summary, the beneficial effects of the above-described technical solutions conceived by this invention compared with the prior art include: (1) The inertia-based safety control switch of the present invention includes a housing, an inertial body, a switching component, an elastic element, a limiting ball, and a cover plate. The non-conductive housing has a large-diameter section and a small-diameter section that are connected. The non-conductive cover plate encloses the limiting ball, the inertial body, the elastic element, and the switching component within the housing. The limiting ball is located in the small-diameter section of the housing, and the inertial body, the elastic element, and the switching component are located in the large-diameter section of the housing. The elastic element abuts between the inertial body and the cover plate. In the initial state, the elastic element connects the conductive inertial body and the switching component. The contact plates are separated, and the arc-shaped boss of the inertial body encloses the limiting ball within the small-diameter section. Under overload, the inertial body can move towards the cover plate to abut against each contact plate, activating the switching component. When the inertial body moves towards the cover plate until the arc-shaped boss releases the constraint on the limiting ball, the limiting ball moves along the arc surface of the arc-shaped boss to its perimeter, 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. The inertial-based safety control switch of this invention achieves the switching of the switching component between the initial state and the ready state through overload, and simultaneously locks the switching component in the ready state to the energized state, realizing reliable and stable operation of the safety control switch. It can issue a release command to the connected control system for safety control, eliminating the risk of ground testing.

[0016] (2) The safety control switch based on inertia of the present invention is composed of a working part, a transition part and a fixing part connected in sequence by setting the contact piece. The fixing part is used to connect with the side wall of the large diameter section. The transition part bends towards the inertial body and separates the working part from the cover plate by a certain distance, leaving a certain space for the working part to move towards the cover plate. After the working part comes into contact with the bottom end of the inertial body, it can move towards the cover plate together with the inertial body to the position. When the inertial body moves away from the cover plate after the overload disappears / reduces, the working part is kept in contact with the inertial body by the deformation recovery of the transition part, so that the inertial body that has rebounded to the self-locking state can also be kept in the state of turning on the component switch.

[0017] (3) The inertia-based safety control switch of the present invention has a blind hole at one end of the inertial body facing the cover plate 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, so as to reduce the vertical length required by the housing and reduce the size of the safety control switch. The connecting piece and the cover plate are connected together at the opening of the stepped hole by the connecting stud to simplify the connection at the opening of the housing, so that the safety control switch of the present invention has a compact structure and is easy to assemble.

[0018] (4) The inertia-based safety control switch of the present invention includes several sets of circuit switches, each set of circuit switches including two of the aforementioned contact plates, so that the safety control switch can simultaneously perform safety control on several circuits.

[0019] (5) The inertia-based safety control switch of the present invention has a compact structure, is easy to assemble, and has an automatic locking function in place, ensuring that the switch components constituting the switch structure and the inertial body maintain reliable contact when in place; it can perform safety control on the control system, and since there is no such overload environment on the ground, it can ensure that the fuse fuse will not be accidentally deactivated when the control system connected to this safety control switch is tested on the ground. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is a schematic diagram of the initial state of the overall structure of the inertia-based safety control switch in an embodiment of the present invention; Figure 2 This is a schematic diagram of the intermediate state of the overall structure of the safety control switch based on inertia in an embodiment of the present invention; Figure 3 This is a schematic diagram of the overall structure of the safety control switch based on inertia in an embodiment of the present invention, showing its position in motion. Figure 4 This is a schematic diagram of the overall structure of the inertia-based safety control switch after overload reduction / disappearance in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the contact piece in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the switching component in an embodiment of the present invention; In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1, housing; 2, inertial body; 3, switching component; 31, contact piece; 311, working part; 312, transition part; 313, fixing part; 32, contact stud; 4, elastic element; 5, limit ball; 6, cover plate. Detailed Implementation

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] Example: Please see Figures 1-6 The inertia-based safety control switch in a preferred embodiment of the present invention includes a housing 1, an inertial body 2, a switching component 3, an elastic element 4, a limiting ball 5, and a cover plate 6. The housing 1 and the cover plate 6 are both made of non-conductive materials; the inertial body 2, used to connect the switching component 3, is made of a 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.

[0028] Specifically, the housing 1 has a stepped hole, which includes a large diameter section and a small diameter section. The small diameter section is a blind hole, and the large diameter section is a through hole. The small diameter section is used to accommodate the limiting ball 5, and the large diameter section is used to accommodate the inertial body 2 and the elastic element 4. A cover plate 6 is connected to the opening of the stepped hole to encapsulate the entire structure into one piece.

[0029] The switch component 3 includes at least two spaced-apart contact plates 31. One end of each contact plate 31 is connected to the side wall of the large-diameter section, and the other end is located between the cover plate 6 and the inertial body 2. The contact plates 31 are preferably made of a material with conductivity and elastic recovery capability, allowing them to conduct electricity and undergo elastic deformation under external force, recovering their deformation when the external force disappears or decreases. For example, the contact plate 31 is integrally machined from beryllium bronze sheet, a material with good conductivity and a high elastic limit. Furthermore, the thickness of the contact plate 31 is preferably 0.5 mm to 0.8 mm to ensure sufficient elastic recovery capability.

[0030] One end of the inertial body 2 is provided with an arc-shaped protrusion that can extend into the small diameter section, which is used to enclose the limiting ball 5 in the small diameter section; the elastic element 4 is provided between the cover plate 6 and the inertial body 2, with one end abutting against the cover plate 6 and the other end abutting against the inertial body 2, so as to separate the cover plate 6 and the inertial body 2.

[0031] The operation process of the safety control switch in this preferred embodiment is as follows: In the initial state, such as Figure 1 As shown, the elastic element 4 abuts the inertial body 2 against the top surface of the large-diameter section to separate the inertial body 2 from the contact piece 31, so that the switch component 3 is in the open state. At this time, the arc-shaped boss encloses the limiting ball 5 in the small-diameter section, and the distance between the end of the inertial body 2 away from the limiting ball 5 and each contact piece 31 is less than the diameter of the limiting ball 5; then, as Figure 2 As shown, when the inertial body 2 moves towards the cover plate 6 under overload until it comes into contact with each contact piece 31, the switching component 3 is turned on; furthermore, as Figure 3As shown, when the inertial body 2 and the limiting ball 5 reach their positions, the limiting ball 5 is fully inside the large-diameter section, the lateral constraint of the limiting ball 5 is released, and the limiting ball 5 moves along the arc surface of the arc-shaped boss to the perimeter of the arc-shaped boss, landing on the end face opposite to the top surface of the large-diameter section of the inertial body 2. After the overload disappears or decreases, the inertial body 2 and the limiting ball 5 move towards the small-diameter section under the drive of the elastic element 4. At this time, the arc surface of the arc-shaped boss forms a limit on the limiting ball 5, preventing the limiting ball 5 from returning to the small-diameter section. Finally, it is stuck between the top surface of the large-diameter section and the end face of the inertial body 2, forming a limiting constraint on the rebound of the inertial body 2, as shown. Figure 4 As shown, the inertial body 2 can no longer move towards the smaller diameter section, thus forming a self-locking state. At this time, the position of the inertial body 2 compared to the initial state changes to the diameter of the limiting ball 5. Since the distance between the end of the inertial body 2 and the contact piece 31 in the initial state is less than the diameter of the limiting ball 5, the bottom end of the inertial body 2 still maintains reliable contact with each contact piece 31 that has recovered its deformation, keeping the switch component 3 in the ON state.

[0032] 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 sum of the weights of the inertial body 2 and the limiting ball 5, to ensure that the elastic element 4 abuts the inertial body 2 against the top surface of the large-diameter section. In a specific preferred embodiment, the resistance of the elastic element 4... With the mass of inertial body 2 The mass of the limiting ball 5 The following relationship exists between them: That is, when the overload felt by inertial body 2 reaches At this point, the inertial body 2 will initiate movement towards the cover plate 6. Since the ground does not experience this overload environment, the fuse safety will not be tripped. Furthermore, the resistance of the elastic element 4 in the positioned state... With the mass of inertial body 2 The mass of the limiting ball 5 The following relationship exists between them: That is, when the overload felt by the inertial body reaches When the condition is met or above, the safety control switch of the present invention will switch to the self-locking state and lock in the on state.

[0033] Furthermore, the side wall of the smaller diameter section of the shell 1 and the top surface of the larger diameter section are preferably connected by an inclined surface to facilitate the movement of the limiting ball 5 to the area between the inertial body 2 and the shell 1.

[0034] In a preferred embodiment, the shell 1 has a stepped cylindrical structure, with the smaller cylindrical section corresponding to the smaller diameter section and the larger cylindrical section corresponding to the larger diameter section. That is, the outer peripheral wall diameter of the shell corresponding to the smaller diameter section is smaller than the outer peripheral wall diameter of the shell corresponding to the larger diameter section, so that the shape of the shell 1 matches the shape of the stepped hole, thereby reducing the size and weight of the shell 1.

[0035] Furthermore, in a preferred embodiment, the inertial body 2 is preferably a cylindrical structure with an outer diameter matching the large diameter section. A blind hole is provided at one end facing the cover plate 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 both can be shortened, thereby reducing the required vertical length of the housing 1 and reducing the size of this safety control switch.

[0036] Furthermore, such as Figure 5 As shown, each contact piece 31 includes a working part 311, a transition part 312, and a fixing part 313 connected in sequence. The fixing part 313 is used to connect with the side wall of the housing 1. The transition part 312 sends the working part 311 into the interior of the large-diameter section, so that the working part 311 is opposite to the end of the cylindrical inertial body 2, which facilitates docking with the end of the inertial body 2. More preferably, the transition part 312 bends towards the inertial body 2, separating the working part 311 from the cover plate 6 by a certain distance, reserving a certain space for the movement of the working part 311 towards the cover plate 6, so that after the working part 311 abuts against the bottom end of the inertial body 2, it can move together with the inertial body 2 towards the cover plate 6 to the position. When the inertial body 2 moves away from the cover plate 6 after the overload disappears / reduces, the deformation recovery of the transition part 312 keeps the working part 311 in contact with the inertial body 2, so that the inertial body 2, which has rebounded to the self-locking state, can also remain in the state of turning on the switch component 3.

[0037] Furthermore, the switch component 3 also includes a stud 32 corresponding to each of the contact pieces 31, used to connect the fixing part 313 of each contact piece 31 to the opening of the stepped hole. More preferably, the side wall of the housing 1 has a channel corresponding to each stud 32, so that the end of each stud 32 away from the fixing plate passes through the housing 1 and connects to a wire. In this embodiment, the stud 32 serves both to conduct electricity and to fix the contact piece 31 to the housing 1. Specifically, the wire connected to the end of the stud 32 away from the contact piece 31 is used to connect to the control system, allowing the switch component 3 of this safety control switch to control the circuit of the control system. Preferably, the stud 32 is made of an aluminum rod with good conductivity.

[0038] Preferably, the opening of the stepped hole is provided with a groove corresponding to each contact piece 31 to accommodate the fixing part 313 of each contact piece 31.

[0039] Furthermore, the connecting stud 32 preferably connects the cover plate 6 to the opening of the stepped hole simultaneously, thereby simplifying the connection at the opening of the housing 1 and making the safety control switch structure of the present invention compact and easy to assemble. Specifically, the fixing part 313 of the connecting piece 31 has a through hole, and the cover plate 6 has a stepped through hole. The connecting stud 32 passes through the stepped through hole and the through hole of the fixing part 313 in sequence and is threadedly connected to the channel of the side wall of the housing 1, thereby fixing the cover plate 6 and the connecting piece 31 to the opening of the housing 1.

[0040] Preferably, the switch component 3 includes several sets of circuit switches, each set of circuit switches including two contact pieces 31, so that this safety control switch can simultaneously perform safety control on several circuits. Specifically, preferably, each contact piece 31 is evenly distributed around the perimeter of the cover plate 6, and two adjacent contact pieces 31 form a set of circuit switches.

[0041] For example, such as Figure 6 As shown, the switch component 3 includes two sets of circuit switches. Four contact pieces 31 are evenly connected around the cover plate 6 by four contact studs 32. Two adjacent contact pieces 31 form a set of circuit switches, so as to facilitate the arrangement of the wires connected to the contact studs 32 of each set of circuit switches.

[0042] The inertia-based safety control switch of this invention has a compact structure, is easy to assemble, and has an automatic locking function when in position, ensuring that the switch components constituting the switch structure and the inertial body maintain reliable contact when in position; it can perform safety control on the control system, and since there is no such overload environment on the ground, it can ensure that the fuse will not be misfired when the control system connected to this safety control switch is tested on the ground.

[0043] 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. A safety control switch based on inertia, characterized in that, It includes a housing, an inertial body, a switching component, an elastic element, a limiting ball, and a cover plate; the housing and the cover plate are made of non-conductive material; The housing has a stepped hole, which includes a large diameter section and a small diameter section. The small diameter section is a blind hole, and the large diameter section is a through hole. The small diameter section is used to accommodate a limiting ball, and the large diameter section is used to accommodate the inertial body and the elastic element. A cover plate is connected to the opening of the stepped hole. The inertial body is made of conductive material, and one end of the inertial body is provided with an arc-shaped boss that can extend into the small diameter section. 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 is located between the cover plate and the inertial body. The elastic element is disposed between the cover plate and the inertial body, with one end abutting against the cover plate and the other end abutting against the inertial body; In the initial state, the elastic member abuts the inertial body against the housing to separate the inertial body from the contact piece. At this time, the arc-shaped boss encloses the limiting ball in the small diameter section, and the distance between the end of the inertial body away from the limiting ball and each of the contact pieces is less than the diameter of the limiting ball. Under overload, the inertial body can move towards the cover plate to abut against each of the contact plates and turn on the switch component; and when the inertial body moves towards the cover plate until the arc-shaped boss releases the constraint on the limiting ball, the limiting ball moves along the arc surface of the arc-shaped boss to the periphery of the arc-shaped boss, forming a limiting constraint on the rebound of the inertial body.

2. The inertia-based safety control switch according to claim 1, characterized in that, The inertial body has a blind hole at one end facing the cover plate to accommodate the elastic element.

3. The inertia-based safety control switch according to claim 1, characterized in that, Each of the aforementioned contact plates includes a working part, a transition part, and a fixing part connected in sequence. The fixing plate is used to connect to the side wall of the large-diameter section, and the transition part is bent towards the inertial body.

4. The inertia-based safety control switch according to claim 3, characterized in that, The switch component also includes a stud corresponding to each of the contact pieces, used to connect the fixing part of each contact piece to the opening of the stepped hole.

5. The inertia-based safety control switch according to claim 4, characterized in that, The stepped hole openings are provided with grooves corresponding to each fixing part for accommodating the fixing part; and / or, the sidewall of the large-diameter section is provided with channels corresponding to each of the power-connecting studs so that the end of each power-connecting stud away from the fixing plate passes through the housing and connects to the wire.

6. The inertia-based safety control switch according to claim 4, characterized in that, The power-connecting stud also connects the cover plate to the opening of the stepped hole.

7. The inertia-based safety control switch according to any one of claims 4 to 6, characterized in that, The power-connecting stud is made of aluminum rod.

8. The inertia-based safety control switch according to any one of claims 1 to 6, 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.

9. The inertia-based safety control switch according to any one of claims 1 to 6, 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.

10. The inertia-based safety control switch according to claim 9, characterized in that, Each contact piece is evenly distributed around the perimeter of the cover plate, and two adjacent contact pieces form a set of circuit switches.

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