CN110993433B

CN110993433B - Locking type inertia switch

Info

Publication number: CN110993433B
Application number: CN201911175251.2A
Authority: CN
Inventors: 李响; 常江
Original assignee: Hubei Sanjiang Aerospace Honglin Exploration and Control Co Ltd
Current assignee: Hubei Sanjiang Aerospace Honglin Exploration and Control Co Ltd
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2021-11-09
Anticipated expiration: 2039-11-26
Also published as: CN110993433A

Abstract

The invention discloses a locking type inertia switch, which belongs to the technical field of inertia switches, and can effectively realize the separation of a moving electrode and a static electrode when the moving electrode does not work and the stable and reliable matching with the static electrode when the moving electrode works through the corresponding arrangement of the moving electrode part, the static electrode part and a locking part; and through the corresponding setting of locking part, can effectively ensure that the back movable electrode part that the movable electrode matches with the static electrode can be locked at operating position by the locking part, avoid reducing or transshipping the movable electrode part that leads to that disappears and reset because of overloading. The locking type inertia switch has the advantages of simple structure, simple and convenient assembly, capability of effectively avoiding unstable matching of the moving electrode and the static electrode, realization of reliable locking after matching of the moving electrode and the static electrode, good working accuracy and high reliability of the inertia switch, more cycle times and long service life of the inertia switch, capability of effectively reducing the use cost of the inertia switch and promoting the application of the inertia switch, and better practical value and popularization value.

Description

Locking type inertia switch

Technical Field

The invention belongs to the technical field of inertial switches, and particularly relates to a locking type inertial switch.

Background

The inertial switch has very wide application in the fields of aerospace, automotive electronics, ammunition and the like. In general, an inertial switch is closed by a reaction force or a forward-impact inertial force when a carrier hits a target, and a function of switching a circuit from off to on is realized. The inertial switch has wide requirements in fuses, especially electromechanical fuses, and is an important component for realizing triggering detonation or landing self-destruction functions of the electromechanical fuses.

Currently, a combination structure of a spring and a mass is often used in a conventional inertial switch, and the spring and the mass serve as a movable electrode and correspond to a fixed electrode which is separately provided and spaced apart from the movable electrode by a predetermined distance. When the movable electrode is overloaded, the spring is extended, and the mass block collides with the fixed electrode, so that the switch is switched from off to on. Although the inertial switch can meet the use requirement to a certain extent, the inertial switch also has certain defects, and mainly, after the mass block collides with the fixed electrode, the mass block is often bounced open, so that the control of the closing time of the inertial switch is inaccurate, and the contact reliability of the contact is poor. In addition, in some products, in order to prevent accidental impacts, self-locking is often required to be realized after the switch is closed, so as to ensure the continuity and stability of power connection of the switch and ensure the stable operation of a power supply and a load circuit, but the conventional inertial switch is often difficult to realize, so that the application of the products is limited.

Disclosure of Invention

In view of one or more of the above drawbacks or needs for improvement in the prior art, the present invention provides a latching type inertial switch, in which a moving electrode component, a static electrode component, and a latching component are correspondingly disposed, so as to effectively achieve reliable matching between the moving electrode and the static electrode under a corresponding overload, achieve corresponding latching when the moving electrode and the static electrode are matched, avoid matching failures of the moving electrode and the static electrode when the overload is reduced or disappears, and ensure stability and reliability of the operation of the inertial switch.

In order to achieve the above object, the present invention provides a latching type inertia switch, comprising a housing, an outer case, a moving electrode member, a static electrode member, an inertia spring, and a locking member;

the outer sleeve is made of a non-conductive material, and one end of the outer sleeve is provided with an outer sleeve blind hole; the shell is coaxially embedded into the outer sleeve blind hole, is made of a conductive material, and is provided with a shell blind hole at one end opposite to the bottom of the outer sleeve blind hole;

the movable electrode part is accommodated in the shell blind hole and comprises a mass cylinder, a movable electrode and a counterweight body; the counterweight body is coaxially connected to one end of the mass cylinder; the movable electrode comprises a connecting sheet fixed between the end parts of the counterweight body and the mass cylinder which are connected with each other, and two support legs connected to the periphery of the connecting sheet; one end of the support leg is connected to the periphery of the connecting sheet, the other end of the support leg extends to one side departing from the counterweight body along the axial direction, and the end part of the extending support leg is provided with a protruding end; the outermost side of the protruding end protrudes out of the outer circumferential wall surface of the mass cylinder in the radial direction and is correspondingly abutted against the inner circumferential wall surface of the shell, and other parts of the support legs except the protruding end are not in contact with the inner circumferential wall surface of the shell;

the inertia spring is accommodated in the shell blind hole, one end of the inertia spring is abutted against the bottom of the shell blind hole, and the other end of the inertia spring is matched with the counterweight body;

the peripheral wall surface of the shell is provided with a static electrode accommodating groove corresponding to the static electrode component, and the static electrode accommodating groove is provided with a through hole communicated with the shell blind hole, namely a static electrode mounting hole; the static electrode part is accommodated in the static electrode accommodating groove and comprises a static electrode and an insulator; the static electrode is not contacted with the shell, is coated in the insulator, and is embedded into the static electrode mounting hole in a matching way at one end, and the end of the static electrode embedded into the static electrode mounting hole is aligned with one of the two support legs at intervals in the radial direction and can be abutted against the protruding end of the end part of the support leg after the movable electrode component moves along the axial direction;

the locking component is arranged corresponding to the movable electrode component and used for locking the movable electrode component when the movable electrode is matched with the static electrode.

As a further improvement of the invention, the locking member is arranged at one side close to the bottom of the blind hole of the outer sleeve, and a locking hole which sequentially penetrates through the outer peripheral wall of the outer sleeve and the outer peripheral wall of the shell is arranged corresponding to the locking member and is a stepped hole;

the locking component is accommodated in the locking hole and comprises a pressing screw, a locking spring and a locking pin which are arranged from outside to inside in sequence; the pressing screw can be fixed in the locking hole, the locking pin is in a stepped shaft structure which can be matched with the locking hole, and the locking pin can be driven by the locking spring to extend into the blind hole of the shell with an end part when the movable electrode is matched with the static electrode and abut against the end part of the mass cylinder with the end part.

As a further improvement of the invention, the included angle between the axis of the locking hole and the horizontal line is 0-45 degrees.

As a further improvement of the present invention, the protruding end is fitted to the inner peripheral wall surface of the housing in an interference fit.

As a further improvement of the present invention, an end portion of the static electrode fitted into the static electrode mounting hole protrudes from an inner peripheral wall surface of the housing.

As a further improvement of the present invention, a groove having a certain depth is axially formed on the inner peripheral wall surface of the housing corresponding to the two protruding ends, and the protruding ends abut against the bottom surface of the groove.

As a further improvement of the present invention, the outer circumferential wall surface of the mass cylinder is provided with a guide pin groove having a certain length in the axial direction, the outer circumferential wall surface of the housing is provided with a guide pin hole corresponding thereto, the guide pin hole is provided with a guide pin having an end portion protruding from the inner circumferential wall surface of the housing, and the end portion of the guide pin protrudes into the guide pin groove.

As a further improvement of the invention, electrode grooves are respectively arranged on the periphery of the quality cylinder along the axial direction corresponding to the two support legs, and the support legs are accommodated in the corresponding electrode grooves.

As a further improvement of the invention, the outer peripheral wall surface of the protruding end is coated with a solid film protective agent.

As a further improvement of the invention, the bottom of the outer sleeve blind hole is provided with a bottom through hole communicated with the outside of the outer sleeve.

The above-described improved technical features may be combined with each other as long as they do not conflict with each other.

Generally, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:

(1) according to the latching type inertia switch, the movable electrode part, the static electrode part and the locking part are correspondingly arranged, so that the movable electrode can be effectively separated from the static electrode when not working, and can be stably and reliably matched with the static electrode when working, and the working stability and reliability of the inertia switch are improved; the locking component is correspondingly arranged, so that the movable electrode component can be effectively locked at the working position by the locking component after the movable electrode is matched with the static electrode, the resetting of the movable electrode component caused by the reduction or disappearance of the overload is avoided, and the reliability and the stability of the matching of the movable electrode and the static electrode are ensured;

(2) the closed inertial switch has the advantages that the movable electrode is arranged in a mode of combining the support legs, the connecting sheet and the protruding ends, the conductivity of the shell is combined, the protruding ends are abutted to the inner peripheral wall surface of the shell, so that the movable electrode is always communicated with the shell, namely is stably connected with one electrode of the inertial switch, and the matching mode of the protruding ends and the inner peripheral wall surface of the shell is arranged in an interference fit mode, so that the reliable matching of the movable electrode and the shell is fully ensured;

(3) the closed inertial switch is characterized in that an axial groove is arranged on the inner peripheral wall surface of the shell corresponding to the protruding end, and/or a combination form matched with the guide pin and the guide pin groove is correspondingly arranged, so that the axial movement of the movable electrode component is guided, the rotation of the movable electrode component is prevented, the protruding end of the movable electrode can be accurately matched with the static electrode, and the accuracy and the reliability of the matching of the movable electrode and the static electrode are further improved;

(4) according to the latching type inertia switch, the materials of the movable electrode and the static electrode are preferably arranged, and the thickness, the interference magnitude and the protruding magnitude of the end part of the static electrode are preferably arranged, so that the movable electrode and the static electrode can be matched under the corresponding overload condition, the circulating times of the inertia switch are increased, the matching reliability of the movable electrode and the static electrode is ensured, and the service life of the inertia switch is prolonged;

(5) according to the latching type inertia switch, the periphery of the protruding end and the end part of the locking pin are correspondingly coated with the fixed film protective agent, and the end part of the locking pin matched with the periphery of the mass cylinder is arranged to be spherical, so that the friction force between a moving electrode and the inner wall surface of the shell and the friction force between the locking pin and the outer wall surface of the mass cylinder are correspondingly reduced, the starting overload of the inertia switch can be accurately adjusted by the inertia spring, the counterweight body and other parts, and the use reliability of the inertia switch is further improved;

(6) the locking type inertia switch has the advantages of simple structure, simple and convenient assembly, high matching reliability of the moving electrode and the static electrode, and capability of effectively avoiding unstable matching of the moving electrode and the static electrode; meanwhile, the movable electrode can be stably limited by the locking component after being in place, so that reliable contact between the movable electrode and the static electrode is guaranteed, the problem that the traditional inertia switch cannot be matched and locked to cause misalignment in control is avoided, the use stability and reliability of the inertia switch can be effectively improved, the application of the inertia switch is promoted, and the inertia switch has better practical value and popularization value.

Drawings

Fig. 1 is a structural sectional view of a latching type inertia switch in an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a latching inertial switch at another angle in accordance with an embodiment of the present invention;

fig. 3 is an exploded view of the structure of a latching type inertia switch in an embodiment of the present invention;

FIG. 4 is a schematic diagram of the structure of the moving electrode part of the latching inertial switch in the embodiment of the present invention;

FIG. 5 is a schematic diagram of the structure of the moving electrode of the latching inertial switch according to the embodiment of the present invention;

FIG. 6 is a schematic view of the latching component of the latching inertial switch of the present invention;

in all the figures, the same reference numerals denote the same features, in particular: 1. a moving electrode component, 101, a mass cylinder, 1011, an electrode groove and 1012, a guide pin groove; 102. the moving electrode comprises 1021 support legs, 1022 protruding ends and 1023 connecting sheets; 103. a counterweight body; 2. a stationary electrode part, 201, a stationary electrode, 202, an insulator; 3. an inertia spring, 4, a shell, 401, a static electrode accommodating groove, 402, a static electrode mounting hole, 403, a guide pin hole; 5. a locking component, 501, a compression screw, 502, a locking pin, 503, a locking spring; 6. guide pin, 7, outer sleeve, 701, first locking hole, 702, bottom through hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Example (b):

the latching inertial switch in the preferred embodiment of the invention is shown in fig. 1-5. The device comprises a movable electrode component 1, a static electrode component 2, an inertia spring 3, a shell 4, a locking component 5, a guide pin 6 and an outer sleeve 7 which are correspondingly matched.

Specifically, the housing 4 and the outer cover 7 in the preferred embodiment are respectively of a cylindrical structure, where the cylindrical structure may be a cylindrical structure, a square cylindrical structure, or a different cylindrical structure, and one end of each of the two cylindrical bodies is axially provided with a blind hole with a certain depth, and the outer shape of the housing 4 corresponds to the blind hole formed in the outer cover 7, so that the housing 4 can be inserted into the blind hole in the outer cover 7 in a matching manner. Preferably, in the preferred embodiment, the blind hole formed at one end of the outer sleeve 7 is a round hole, that is, the housing 4 is in a cylindrical structure; meanwhile, the blind hole formed at one end of the shell 4 is also a circular blind hole and is used for correspondingly embedding and mounting the moving electrode component 1.

When correspondingly matched, the housing 4 is matched with one end provided with the blind hole, extends into the blind hole sleeved outside the housing, and abuts against the bottom of the blind hole with the end part, as shown in fig. 1 and 2. In this way, the movable electrode member 1 can be enclosed in the case 4. Further, the movable electrode part 1 in the preferred embodiment comprises a mass cylinder 101, a movable electrode 102 and a weight body 103, as shown in fig. 4. The mass cylinder 101 has a cylindrical structure, which may be a solid structure or a cylindrical structure with a certain wall thickness. The mass cylinder 101 in the preferred embodiment is a cylindrical solid structure, a blind hole with a certain depth is formed in the center of one end of the mass cylinder 101 along the axial direction, and an internal thread is correspondingly arranged in the blind hole for correspondingly matching the weight body 103, the weight body 103 in the preferred embodiment is a cylindrical structure with an outer diameter smaller than that of the mass cylinder 101, the cylindrical structure is coaxially arranged with the mass cylinder 101 and correspondingly matched with the mass cylinder in a threaded manner, namely, the weight body 103 is correspondingly matched with the end of the mass cylinder 101.

Further, the moving electrode 102 in the preferred embodiment is as shown in fig. 5, and includes a connecting sheet 1023 in a sheet shape, two sides of the connecting sheet 1023 are provided with support legs 1021, one end of each support leg 1021 is fixedly connected to the outer side of the connecting sheet 1023, the other end extends outwards along the axis of the connecting sheet 1023, one end of each support leg 1021 far away from the connecting sheet 1023 is provided with a protruding end 1022, the protruding end 1022 protrudes outwards along one end departing from the other support leg 1021 to form an "Ω" shape, after the two protruding ends 1022 are completely arranged, the inner peripheral wall surfaces of the two protruding ends 1022 are opposite, and the protruding directions of the two protruding ends 1022 are mutually deviated. Further preferably, the connecting piece 1023 in the preferred embodiment is a circular sheet structure, as shown in fig. 5, a circular through hole is opened in the middle portion for the connector at the end of the weight body 103 to pass through, and then the connecting piece 1023 is arranged between the mass cylinder 101 and the end of the weight body 103 and clamped.

Further, in the preferred embodiment, the outer peripheral wall surfaces of the two sides of the mass cylinder 101 are axially provided with elongated slots, i.e., electrode slots 1011, for accommodating the two legs 1021. When the connecting piece 1023 is correspondingly arranged between the counterweight body 103 and the end part of the mass cylinder 101, the two legs 1021 are just embedded into the electrode slot 1011, and the outermost side of the protruding end 1022 protrudes out of the outer peripheral wall surface of the mass cylinder 101, so that the interference fit of the movable electrode 102 and the inner peripheral wall surface of the shell 4 is realized.

Further, an inertia spring 103 is disposed corresponding to the movable electrode member 1, and the inner diameter thereof is preferably between the outer diameter of the weight body 103 and the outer diameter of the mass cylinder 101, so that one end of the inertia spring 3 can abut against the end of the mass cylinder 101 after being sleeved on the outer periphery of the weight body 103, and the other end abuts against the bottom of the blind hole at the end of the housing 4, when the housing 4 is correspondingly accommodated in the outer sleeve 7, the end of the mass cylinder 101 departing from the inertia spring 3 abuts against the bottom of the blind hole at the end of the outer sleeve 7, and the bottom of the inertia spring 3 abuts against the bottom of the blind hole at the end of the housing 4. Preferably, at this time, the inertia spring 3 has a certain amount of compression, the protruding end 1022 of the movable electrode 102 abuts against the inner peripheral wall surface of the housing 4, and the protruding end 1022 of the movable electrode 102 receives a certain radial force and deforms by a certain amount.

Preferably, in order to realize the accurate movement of the movable electrode part 1 in the housing 4 and avoid the rotation of the movable electrode part 1 in the housing 4, in a preferred embodiment, a groove with a certain depth is axially formed on the inner peripheral wall surface of the housing 4 corresponding to the two protruding ends 1022, the outermost side of the protruding end 1022 abuts against the bottom of the groove, and when the movable electrode part 1 moves axially, the protruding end 1022 can move axially in the groove, thereby ensuring the accuracy of the movement control of the protruding end 1022.

Further, in addition to the above manner, in a preferred embodiment, the movement accuracy of the movable electrode component 1 can be controlled by providing a form that the guide pin 6 and the guide pin groove 1012 are matched, that is, a guide pin groove 1012 with a certain length is axially formed on the outer periphery of the mass cylinder 101, the guide pin 6 is provided at a corresponding position on the housing 4, one end of the guide pin 6 extends into the inner periphery of the housing 4 and correspondingly extends into the guide pin groove 1012, the width of the groove of the guide pin groove 1012 is preferably equal to or slightly greater than the outer diameter of the guide pin 6, and since the mass cylinder 101 is just matched and inserted into the blind hole of the housing 4, when the guide pin 6 is matched with the guide pin groove 1012, the movable electrode component 1 can only move axially and cannot rotate. Accordingly, a through hole, i.e., a guide pin hole 403, which is preferably a stepped hole, is opened on the outer circumferential wall surface of the housing 4 corresponding to the mounting of the guide pin 6, the guide pin 6 is preferably a stepped shaft structure, as shown in fig. 3, and the guide pin 6 is preferably screw-fitted to the guide pin hole 403, and the end of the guide pin 6 does not protrude from the outer circumferential wall surface of the housing 4 after the fitting.

Further, the static electrode component 2 in the preferred embodiment is disposed corresponding to the dynamic electrode component 1 in the housing 4, and includes a static electrode 201 and an insulator 202, where the static electrode 201 is in a long strip shape, the insulator 202 is used for mounting the static electrode 201, and is in a sheet structure, a through hole in the long strip shape is formed in the middle of the insulator, and the static electrode 201 is mounted in the through hole correspondingly, and then protrudes from the surface of the insulator 202 with its electrode end. Further, in the preferred embodiment, a static electrode accommodating groove 401 is formed on the outer peripheral wall surface of the housing 4 for disposing the static electrode component 2, and a through hole having a long strip shape, i.e. a static electrode mounting hole 402, is formed at the bottom of the static electrode accommodating groove 401 corresponding to the static electrode 201, so that the electrode end of the static electrode 201 can pass through and protrude from the inner peripheral wall surface of the housing 4, as shown in fig. 3. Accordingly, after the insulator 202 is correspondingly inserted into the static electrode receiving slot 401, the outer peripheral wall surface of the insulator 202 does not protrude from the outer peripheral wall surface of the housing 4, for example, in a preferred embodiment, the outer peripheral wall surface of the insulator 202 is an arc surface, and after the insulator 202 is correspondingly inserted into the static electrode receiving slot 401, the outer periphery of the insulator 202 is just flush with the outer peripheral wall surface of the housing 4 when the static electrode receiving slot 401 is not opened, that is, the shape of the insulator 202 just fits into the electrode receiving slot 401.

Further, the end of the static electrode 201 extending into the case 4 protrudes from the inner peripheral wall surface of the case 4, and is aligned with one leg 1021 of the dynamic electrode member 1, but is spaced apart from the end surface of the leg by a predetermined distance. Since the protruding end 1022 abuts against the inner peripheral wall surface of the housing 4, when the movable electrode 102 moves in the direction of compressing the inertia spring 3 with the mass cylinder 101, the protruding end 1022 of the movable electrode 102 can be correspondingly matched with the protruding end of the stationary electrode 201, thereby realizing matching communication between the movable electrode 102 and the stationary electrode 201. Obviously, the axial position of the stationary electrode 201 can be set according to the compressible amount of the inertia spring 3 or the amount of movement of the protruding end 1022 in the axial direction.

Further, in order to lock the moving electrode 102 after moving in place, in a preferred embodiment, a first locking hole 701 is formed in the outer peripheral wall surface of the outer sleeve 7 on the side close to the bottom of the blind hole at the end portion of the outer sleeve; accordingly, a second locking hole is correspondingly formed in the outer peripheral wall surface of the housing 4, and after the housing 4 is correspondingly matched with the outer sleeve 7, the first locking hole 701 and the second locking hole can be coaxially aligned.

Furthermore, locking components 5 are arranged corresponding to the two locking holes, the locking component 5 in the preferred embodiment includes a pressing screw 501, a locking pin 502 and a locking spring 503, a blind hole with a certain depth is opened on one side end surface of the pressing screw 501 for accommodating one end of the locking spring 503, and a blind hole with a certain depth is also opened on one end of the locking pin 502 for accommodating the other end of the locking spring 503; further, the pressing screw 501 may be fixedly connected with the first locking hole 701, and in a preferred embodiment, the pressing screw and the first locking hole are screwed; meanwhile, the second locking hole is communicated with the inner periphery of the housing 4, and the locking pin 502 is of a stepped shaft structure, which is provided with a blind hole and has an outer diameter matched with one end of the locking spring 503 larger than that of the other end; accordingly, the first locking hole 701 or the second locking hole of the mating locking pin 502 is provided as a corresponding stepped hole to prevent the locking pin 502 from dropping into the housing 4 after protruding into the housing 4 with its end. For example, in a preferred embodiment the first locking hole 701 is open as a stepped hole, as shown in fig. 2.

Further, one end of the locking pin 502, which is away from the locking spring 503, is an abutting end and is used for abutting against the outer peripheral wall surface of the mass cylinder 101, when the end of the mass cylinder 101 abuts against the bottom of the outer casing blind hole, the end of the locking pin 502 abuts against the outer peripheral wall surface of the mass cylinder 101 under the pressure of the locking spring 503, that is, the locking spring 503 has a certain amount of compression at this time; preferably, the abutting end of the locking pin 502 is provided in a spherical shape to reduce the frictional force of the end of the locking pin 502 with the outer periphery of the mass cylinder 101; it is further preferred that a solid film protective agent, such as DJB-823 type solid film protective agent, is applied to the outer periphery of the abutment end of the locking pin 502 to further reduce the friction force between the abutment end and the outer periphery of the housing 4.

Meanwhile, in order to further reduce the friction force of the locking part 5 on the movable electrode part 1, in a preferred embodiment, the opening angle of the first locking hole 701 and the second locking hole is preferably 0-45 degrees to the horizontal line, so that the thrust direction of the locking pin 502 is at a certain angle to the axial direction of the movable electrode part 1, and the mass cylinder 101 is subjected to certain radial component force and certain axial component force, so that the friction force between the locking part 5 and the mass cylinder 101 can be reduced to a certain extent, and when the movable electrode part 1 is reset after disappearance of overload, an axial resistance force is provided to the end part of the mass cylinder 101.

When the locking component 5 is correspondingly arranged on the inertia switch, the end part of the locking pin 502 is abutted against the outer peripheral wall surface of the mass cylinder 101, and when the inertia switch is overloaded, the movable electrode component 1 moves along the axial direction, and the movable electrode 102 is matched with the static electrode 201; at this time, the end of the lock pin 502 is out of contact with the outer peripheral wall surface of the mass cylinder 101, and then axially extends into the housing by the urging force of the lock spring 503. In this way, even if the overload is reduced or eliminated at this time, the mass cylinder 101 can ensure stable matching of the movable electrode 102 and the stationary electrode 201 under the locking of the lock pin 502 (the end of the lock pin 502 abuts against the end of the mass cylinder 101). Of course, if it is desired to effect the resetting of the movable electrode member 1, only the locking member 5 needs to be removed to allow the movable electrode member 1 to be reset by the restoring force of the inertia spring 3.

Of course, the locking member in the preferred embodiment is not limited to the above form, and may be provided in other forms. For example, a hole or a slot is formed in the inner peripheral wall surface of the housing 4, a combined structure composed of a limiting member and an elastic member is arranged in the hole or the slot, the end of the limiting member abuts against the outer periphery of the mass cylinder 101, the tail of the limiting member is connected with the elastic member, and when the top of the mass cylinder 101 goes beyond the position of the limiting member, the end of the limiting member extends outwards to prevent the mass cylinder 101 from rebounding. Further, can also set up a plurality of gag levers on the interior cliff side of casing 4 to set up a plurality of holding tanks or accommodation hole along the axial, the bottom of gag lever post is with torsion spring swing joint in the bottom of holding tank, and can correspond the rotation, when quality section of thick bamboo 101 does not move, the gag lever post is held in the holding tank naturally, when the bottom of holding tank is crossed at the top of quality section of thick bamboo 101, the gag lever post is popped out and is rotatory to horizontal position by torsion spring. And the locking behind the gag lever post rotating the horizontal position can be realized with the double-rotary connecting rod spare on the similar window frame, two connecting rods are respectively with tip swivelling joint promptly, and the other end of two connecting rods is connected the gag lever post respectively and is close to the periphery of link and the wall of holding tank, can form triangular structure after the gag lever post is rotatory to the position like this and lock it, then through the corresponding setting of a plurality of gag lever posts, also can lock quality tube 101 in place.

Further, in order to improve the working accuracy of the inertia switch and prolong the service life of the inertia switch, the structure and the material selection of the inertia switch are preferably set in the preferred embodiment. Among them, the movable electrode 102 is preferably made of beryllium bronze, because beryllium bronze has good electrical conductivity and elasticity and recovery, and is easily deformed when being squeezed, and easily recovers to its original shape when external force is removed. Meanwhile, the thickness of the movable electrode 102 is preferably 0.15mm to 0.25mm, at which it can be deformed by receiving a force of 1N to 10N, and the movable electrode part 1 can receive not less than 50m/s²The operation can be repeatedly performed for more than 500 times (the locking part 5 is not arranged at the moment), and the movable electrode part 1 can be reliably operated and restored to the original position. When the thickness of the movable electrode 102 is small, for example, 0.1mm, and the movable electrode part is repeatedly operated for about 100 times, a fault that the switching is unreliable occurs, and the movable electrode 102 cannot be recovered after inspection; when the thickness of the movable electrode 102 is large, such as 0.3mm, the movable electrode component 1 can only feel 75m/s²The motion is started only when the overload continues. Obviously, in order toThe cycle number of the inertia switch is not too small, the thickness of the moving electrode 102 cannot be too small, and the thickness thereof may be optimized according to the preset initial overload amount. In addition, in order to facilitate the testing of the moving electrode component 1, in the preferred embodiment, a through hole, i.e., a bottom through hole 702, is formed at one end of the outer sleeve corresponding to the bottom of the blind hole of the outer sleeve, and the through hole correspondingly communicates with the outer periphery of the outer sleeve and the blind hole of the outer sleeve, so that the end of the mass cylinder 101 can be directly pressed from the through hole to be tested.

Further, the static electrode 201 in the preferred embodiment is also made of beryllium bronze material with good elasticity, and is in the shape of a stepped cuboid structure, one end of which protrudes out of the inner wall surface of the housing 4 to match with the dynamic electrode 102, and the other end of which is connected with a lead to form one pole of the inertial switch. More preferably, the protruding amount of the end of the static electrode 201 contacting the dynamic electrode 102 is 0.1 mm-0.2 mm, and chamfers are respectively arranged at two ends of the static electrode 201 along the axial direction to facilitate the matching between the dynamic electrode 102 and the static electrode 201, and the electrode end of the static electrode 201 extends in the axial direction to have a certain length, so as to ensure that the dynamic electrode 102 can be in matching contact with the static electrode 201 in a section of range where the dynamic electrode 102 moves in place.

Further, the protruding end 1022 is matched with the inner wall of the housing 4 in an interference fit manner, and the interference magnitude is preferably 0.15mm to 0.25mm, so that the reliable matching of the movable electrode 102 and the housing 4 can be ensured. When the interference is too small, unreliable contact between the moving electrode 102 and the housing 4 may be caused; when the interference is too large, it may cause the moving electrode 102 to be stuck and not start operating at the predetermined amount of interference. Furthermore, the weight body 103 in the preferred embodiment is preferably made of tungsten material, and due to the high density of tungsten, the mass of the entire movable electrode member 1, and thus the actuation overload of the movable electrode member 1, can be adjusted without excessively changing the volume of the weight body 103.

More preferably, a solid film protective agent, such as DJB-823 type solid film protective agent, is also applied to the outer periphery of the protruding end 1022 of the moving electrode 102 to reduce the friction between the protruding end 1022 and the inner peripheral wall of the housing 4, so as to ensure that the displacement amount and the start overload of the moving electrode member 1 can be sufficiently controlled by the preset inertia displacement amount of the inertia spring 3 and the weight setting of the counterweight 103.

Further, the housing 4 is made of a conductive metal material, preferably a steel material, and has the advantages of low price, high strength and good conductivity; the outer sleeve 7 is made of non-conductive non-metallic material, and the insulator 202 is used for accommodating the static electrode 201 and isolating the static electrode 201 from the shell 4; in view of this, when the above components are correspondingly matched, the housing 4 can be used as the other pole of the switch, that is, the housing 4 can be connected with the lead of the other pole, and once the movable electrode 102 is correspondingly matched with the stationary electrode 201, the stationary electrode 201 can be communicated with the housing 4 through the movable electrode 102. In order to sufficiently separate electrostatic electrode 201 from casing 4, an insulator is provided on an inner peripheral wall surface of electrostatic electrode mounting hole 402, or the outer periphery of electrostatic electrode 201 is covered with an insulator and then fitted into electrostatic electrode mounting hole 402.

The locking type inertia switch has the advantages of simple structure, simple and convenient assembly, high conversion reliability of the moving electrode and the static electrode, and capability of effectively avoiding the unstable matching of the moving electrode and the static electrode; meanwhile, after the moving electrode is in place, the locking component can be used for stably limiting, so that reliable contact between the moving electrode and the static electrode is ensured, and the problem of control misalignment caused by the fact that the traditional inertia switch cannot be matched and locked is solved; in addition, locking type inertia switch in this application still possesses manual reset function, only need take off locking part's pressure spiral shell alright take out the stop pin, realize the reseing of moving electrode part, locking part can continue to match in going into the locking hole moreover for inertia switch resumes initial state, above-mentioned control process is simple and convenient, maneuverability is strong, can guarantee under inertia switch operational reliability's the prerequisite, fully promote inertia switch's use convenience, promote inertia switch's application, has better practical value and spreading value.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A latching type inertia switch is characterized by comprising a shell, an outer sleeve, a movable electrode part, a static electrode part, an inertia spring and a locking part;

2. The latching type inertia switch as claimed in claim 1, wherein the locking member is provided at a side close to a bottom of the blind hole of the outer case, and a locking hole is formed corresponding to the accommodation of the locking member and sequentially penetrates through an outer peripheral wall of the outer case and an outer peripheral wall of the housing, and the locking hole is a stepped hole;

3. The latching inertial switch of claim 2, wherein the locking hole axis is angled from 0 ° to 45 ° from horizontal.

4. The latching inertial switch of any one of claims 1 to 3, wherein the raised end mates with an inner peripheral wall surface of the housing in an interference fit.

5. The latching inertial switch according to any one of claims 1 to 3, wherein an end of the static electrode fitted into the static electrode mounting hole protrudes from an inner peripheral wall surface of the housing.

6. The latching inertial switch according to any one of claims 1 to 3, wherein a groove having a certain depth is formed in the inner peripheral wall surface of the housing in the axial direction corresponding to the two projecting ends, and the projecting ends abut against the bottom surface of the groove.

7. The latching type inertia switch as claimed in any one of claims 1 to 3, wherein the outer circumferential wall surface of the mass cylinder is axially provided with a guide pin groove having a predetermined length, and the outer circumferential wall surface of the housing is provided with a guide pin hole corresponding thereto, and the guide pin hole is provided therein with a guide pin having an end portion protruding from the inner circumferential wall surface of the housing, the end portion of the guide pin protruding into the guide pin groove.

8. The latching type inertia switch according to any one of claims 1 to 3, wherein electrode grooves are axially opened on the outer circumference of the mass cylinder corresponding to the two legs, respectively, and the legs are received in the corresponding electrode grooves.

9. The latching inertial switch according to any one of claims 1 to 3, wherein a solid film protective agent is applied to the outer peripheral wall surface of the protruding end.

10. The latching type inertia switch of any one of claims 1 to 3, wherein a bottom through hole communicating with the outside of the outer sleeve is formed at the bottom of the outer sleeve blind hole.