Inertia switch

Abstract

The utility model discloses an inertia switch which comprises a fixed contact, a movable contact, a locking assembly and a limiting ball, the movable contact is opposite to the fixed contact, the locking assembly is arranged in a sliding mode, the limiting ball is arranged in a limiting roller path, and the limiting roller path is formed between the movable contact and the locking assembly. When the locking assembly is located at the locking position, the locking assembly pushes the limiting ball to abut against the movable contact, and the movable contact and the fixed contact are separated from each other so that the movable contact and the fixed contact can be kept in a disconnected state. When the locking assembly is located at the unlocking position, the limiting ball rolls in the direction away from the movable contact along the limiting raceway, and the movable contact slides to abut against the fixed contact so that the movable contact and the fixed contact can be kept in a conducting state. According to the utility model, the locking mode of the movable contact is optimized, the ball locking structure formed by combining the limiting ball and the locking assembly is utilized to replace the existing spring locking structure, the problem of unreliable locking caused by accidental springback of the spring is eliminated, and the inertia switch works more safely and reliably.

Description

Technical Field

[0001] The utility model relates to the technical field of switches, and particularly relates to an inertial switch. Background Art

[0002] An inertial switch is closed by the reaction force or the forward inertial force when the carrier hits the target, realizing the function of switching the circuit from off to on, and is widely used in the fields of aerospace, automobiles, missiles, etc. Taking the missile field as an example, an inertial switch is an important component for sensing environmental force changes during missile launch, flight, and target hitting. Therefore, it is particularly necessary to optimize the structure of the inertial switch.

[0003] Most of the existing inertial switches adopt a combined structure of a spring and a mass block. This combined structure serves as a movable electrode, facing a separately provided fixed electrode with a certain distance maintained between the two electrodes; when the movable electrode senses overload, the mass block collides with the fixed electrode under the action of the spring, causing the inertial switch to switch from the off state to the on state. Although the existing inertial switches can meet the usage requirements to a certain extent, there are also certain defects. For example, in the off state, the locking of the mass block is unreliable, there is a risk of accidental unlocking, resulting in the accidental conduction of the inertial switch, and it is difficult to ensure the safe and reliable operation of the inertial switch. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an inertial switch that adopts a ball locking structure and solves the technical problem that the safety and reliability of the existing inertial switch are difficult to guarantee.

[0005] To achieve the above purpose, the utility model provides an inertial switch, including:

[0006] A fixed contact, which is fixedly arranged;

[0007] A movable contact, which is slidably arranged and faces the fixed contact;

[0008] A locking assembly, which is slidably arranged;

[0009] A limiting ball, which is arranged in a limiting raceway formed between the movable contact and the locking assembly;

[0010] When the locking assembly is in the locking position, the locking assembly pushes the limiting ball to tightly press against the movable contact, and the movable contact and the fixed contact are separated from each other to keep the two in the off state;

[0011] When the locking assembly is in the unlocking position, the limiting ball rolls along the limiting raceway in a direction away from the movable contact, and the movable contact slides to abut against the fixed contact to keep the two in the on state.

[0012] Preferably, it further includes a mounting shell formed with a locking chute, and the locking assembly includes:

[0013] A guide rod fixedly arranged at the bottom of the locking chute;

[0014] A lower inertia cylinder coaxially opposite to the guide rod and slidably arranged in the locking chute;

[0015] A lower inertia spring coaxially connected between the lower inertia cylinder and the guide rod, and the lower inertia spring is used to sleave the lower inertia cylinder on the guide rod by compression when the lower inertia cylinder bears inertial force.

[0016] Preferably, the locking assembly further includes:

[0017] An upper inertia cylinder slidably arranged in the locking chute and slidably connected to the lower inertia cylinder;

[0018] An upper inertia spring coaxially connected between the upper inertia cylinder and the lower inertia cylinder, and the upper inertia spring is used to sleave the upper inertia cylinder on the lower inertia cylinder by compression when the upper inertia cylinder bears inertial force.

[0019] Preferably, a limiting retaining ring is formed on the inner wall of the lower inertia cylinder, and both ends of the limiting retaining ring abut against the upper inertia spring and the lower inertia spring respectively; a limiting step is formed on the outer side surface of the guide rod; when the lower inertia cylinder is sleaved on the guide rod, the limiting step abuts against the limiting retaining ring to limit the movement of the lower inertia cylinder relative to the guide rod.

[0020] Preferably, an avoidance hole is formed in the center of the limiting retaining ring, and the avoidance hole is used to avoid the guide rod when the lower inertia cylinder moves towards the guide rod.

[0021] Preferably, a limiting screw is fixedly arranged on the edge of the locking chute, and the limiting screw is used to limit the movement of the locking assembly so that the locking assembly stays at the locking position.

[0022] Preferably, a closed cover is formed at one end of the upper inertia cylinder away from the lower inertia cylinder, and the closed cover is provided with a limiting boss; when the locking assembly is in the unlocking position, the limiting ball falls on the limiting boss.

[0023] Preferably, a guide chute is further formed in the mounting shell, and the movable contact is slidably arranged in the guide chute; a pushing spring is arranged between the movable contact and the guide chute, and the pushing spring is used to push the movable contact to slide along the guide chute towards the fixed contact when the limiting ball is away from the movable contact.

[0024] Preferably, a locking notch is formed in the middle section of the movable contact; when the locking assembly is in the locking position, the limiting ball slides into the locking notch.

[0025] Preferably, it further includes a circuit board which is provided with fixing holes, and the fixed contacts are inserted into the fixing holes; the edges of the fixing holes are fixed to the conductive ring; one end of the movable contact facing the fixed contact is formed with a plugging groove, and an abutting ring is formed on the edge of the plugging groove; when the movable contact abuts against the fixed contact, the fixed contact is inserted and conductively connected with the plugging groove, and the abutting ring is abutted and conductively connected with the conductive ring.

[0026] Compared with the background art, the inertia switch provided by the present utility model includes a fixed contact, a movable contact, a locking assembly and a limiting ball. The movable contact is opposite to the fixed contact. The locking assembly is slidably arranged, and the limiting ball is arranged in a limiting raceway which is formed between the movable contact and the locking assembly.

[0027] When the locking assembly is in the locking position, the locking assembly and the movable contact respectively block both ends of the limiting raceway, so that the limiting ball stays in the limiting raceway. The locking assembly pushes the limiting ball, and the limiting ball presses against the movable contact to limit the sliding of the movable contact. The movable contact and the fixed contact are separated from each other, so that the two are kept in a disconnected state, and at this time the inertia switch is disconnected.

[0028] When the locking assembly is in the unlocking position, the locking assembly moves away from the limiting raceway, and one end of the limiting raceway away from the movable contact is open. The limiting ball rolls along the limiting raceway in the direction away from the movable contact. The limiting ball releases the locking, and the movable contact slides to abut against the fixed contact, so that the two are kept in a conductive state, and at this time the inertia switch is conductive.

[0029] The present utility model optimizes the locking mode of the movable contact, and uses a ball locking structure composed of a limiting ball and a locking assembly to replace the existing spring locking structure, eliminating the problem of unreliable locking caused by accidental spring rebound. The inertia switch works more safely and reliably. Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0031] Figure 1 It is a cross-sectional view of the inertia switch provided by the embodiment of the present utility model in the disconnected state;

[0032] Figure 2 It is a cross-sectional view of the inertia switch provided by the embodiment of the present utility model in the conductive state;

[0033] Figure 3 It is Figure 1 the structural diagram of the fixed contact in

[0034] Figure 4 is Figure 1 The structural diagram of the movable contact in

[0035] Figure 5 is Figure 1 The sectional view of the locking component in

[0036] Figure 6 is Figure 1 The structural diagram of the circuit board in

[0037] The reference numerals are as follows:

[0038] Fixed contact 1, movable contact 2, locking component 3, limit ball 4, mounting shell 5, limit screw 6, pushing spring 7, circuit board 8 and end cover 9;

[0039] Locking notch 21, insertion groove 22, abutting ring 23, spring guide rod 24 and stop step 25;

[0040] Guide rod 31, lower inertia cylinder 32, lower inertia spring 33, upper inertia cylinder 34 and upper inertia spring 35;

[0041] Limit step 311;

[0042] Limit retaining ring 321 and relief hole 322;

[0043] Sealing cover 341 and limit boss 342;

[0044] Limit raceway 51, locking chute 52, guiding chute 53 and intermediate partition 54;

[0045] Fixed hole 81 and conductive ring 82. Detailed implementation manners

[0046] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0047] In order to enable those skilled in the art of this technology to better understand the solution of the present utility model, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0048] An embodiment of the present utility model discloses an inertial switch, as shown in the attached Figure 1 and 2As shown, it includes a fixed contact 1, a movable contact 2, a locking component 3 and a limiting ball 4. The fixed contact 1 is fixedly arranged. The movable contact 2 is slidably arranged, and the movable contact 2 is coaxially opposite to the fixed contact 1, enabling the movable contact 2 to slide relative to the fixed contact 1.

[0049] As shown in the Figure 5 attachment, the locking component 3 is slidably arranged. The locking component 3 has two extreme positions, namely the locking position and the unlocking position. The locking position refers to the position where the locking component 3 locks the movable contact 2, and the unlocking position refers to the position where the locking component 3 unlocks the movable contact 2. The locking component 3 is usually in the locking position, keeping the inertial switch in the normally open state; only when the locking component 3 bears a large inertial force, the locking component 3 slides from the locking position to the unlocking position. After the locking component 3 is unlocked, the inertial switch remains in the normally closed state.

[0050] As shown in the Figure 1 attachment, the limiting ball 4 is arranged in the limiting raceway 51. The limiting raceway 51 is formed between the movable contact 2 and the locking component 3, enabling the limiting raceway 51 to guide the rolling of the limiting ball 4. The limiting raceway 51 is obliquely and penetratingly arranged on the middle partition 54 of the mounting shell 5. The middle partition 54 is used to separate the locking chute 52 and the guiding chute 53. It should be noted that the end of the limiting raceway 51 close to the movable contact 2 is higher than the end close to the locking component 3, that is, the limiting raceway 51 is designed with the left end lower and the right end higher, so that the limiting ball 4 rolls out of the limiting raceway 51 by gravity when the locking component 3 moves away from the limiting raceway 51.

[0051] When the locking component 3 is in the locking position, the locking component 3 and the movable contact 2 respectively block both ends of the limiting raceway 51, causing the limiting ball 4 to stay in the limiting raceway 51. The locking component 3 pushes the limiting ball 4, and the limiting ball 4 presses tightly against the movable contact 2, restricting the sliding of the movable contact 2. The movable contact 2 and the fixed contact 1 are separated from each other, keeping the two in the disconnected state. At this time, the inertial switch is disconnected, as shown in the Figure 1 attachment.

[0052] When the locking component 3 is in the unlocking position, the locking component 3 moves away from the limiting raceway 51, and the end of the limiting raceway 51 away from the movable contact 2 is open. The limiting ball 4 rolls along the limiting raceway 51 in the direction away from the movable contact 2. The limiting ball 4 is unlocked, and the movable contact 2 slides to abut against the fixed contact 1, keeping the two in the conducting state. At this time, the inertial switch is conducting, as shown in the Figure 2 attachment.

[0053] In summary, the present utility model optimizes the locking method of the movable contact 2. By using a ball locking structure composed of the limiting ball 4 and the locking component 3 to replace the existing spring locking structure, the problem of unreliable locking caused by accidental spring rebound is eliminated, and the inertial switch works more safely and reliably.

[0054] The inertia switch further includes an installation shell 5, and a locking chute 52 is formed inside the installation shell 5. As shown in the attached drawings, the locking assembly 3 is slidably disposed in the locking chute 52. The locking assembly 3 includes a guiding rod 31, a lower inertia cylinder 32 and a lower inertia spring 33. The guiding rod 31 is vertically fixed to the bottom of the locking chute 52, and the guiding rod 31 is used to guide the movement of the lower inertia cylinder 32. The lower inertia cylinder 32 is coaxially opposite to the guiding rod 31, and the lower inertia cylinder 32 is slidably disposed in the locking chute 52. The lower inertia spring 33 is coaxially connected between the lower inertia cylinder 32 and the guiding rod 31. When the inertia switch does not bear an inertia force, the lower inertia spring 33 supports the lower inertia cylinder 32 by elastic force to ensure reliable locking of the locking assembly 3. When the inertia switch bears an inertia force, the lower inertia cylinder 32 compresses the lower inertia spring 33, and the lower inertia cylinder 32 moves towards the guiding rod 31 against the elastic force of the lower inertia spring 33, reducing the unlocking difficulty of the locking assembly 3. Figure 1

[0055] The locking assembly 3 further includes an upper inertia cylinder 34 and an upper inertia spring 35. As shown in the attached drawings and 5, the upper inertia cylinder 34 is slidably disposed in the locking chute 52, and the upper inertia cylinder 34 is slidably connected to the lower inertia cylinder 32. Specifically, the upper inertia cylinder 34 is slidably sleeved on the outer side wall of the lower inertia cylinder 32, and the outer side wall of the upper inertia cylinder 34 abuts against the inner side wall of the locking chute 52, so that the locking chute 52 guides the linear sliding of the upper inertia cylinder 34 to prevent the upper inertia cylinder 34 from getting stuck due to radial swing during the sliding process. The upper inertia spring 35 is coaxially connected between the upper inertia cylinder 34 and the lower inertia cylinder 32. When the inertia switch does not bear an inertia force, the upper inertia spring 35 supports the upper inertia cylinder 34 by elastic force to ensure reliable locking of the locking assembly 3. When the inertia switch bears an inertia force, the upper inertia cylinder 34 compresses the upper inertia spring 35, and the upper inertia cylinder 34 moves towards the lower inertia cylinder 32 against the elastic force of the upper inertia spring 35. That is to say, the locking assembly 3 of the present utility model adopts a double-spring structure, which can not only ensure that the locking assembly 3 has sufficient supporting force to limit the accidental sliding and unlocking of the locking assembly 3, but also extend the sliding stroke of the locking assembly 3 to meet the movable contact 2 with a longer stroke, and both the safety and adaptability are improved. The lower inertia spring 33 and the lower inertia spring 33 are both cylindrical springs, but are not limited thereto. Figure 1 、 2

[0056] To make the structure of the locking assembly 3 more compact, a limiting retaining ring 321 is formed on the inner wall of the lower inertia cylinder 32. The two ends of the limiting retaining ring 321 respectively abut against the upper inertia spring 35 and the lower inertia spring 33, so that the limiting retaining ring 321 has both a limiting and a connecting function, eliminating the need for an additional limiting structure, making the structure of the lower inertia cylinder 32 simpler and more convenient for assembly.

[0057] A limiting step 311 is formed on the outer side surface of the guiding rod 31. As shown in the attached drawings Figure 5 ​​As shown in the figure; when the lower inertia cylinder 32 is sleeved on the guide rod 31, the limit step 311 abuts against the limit retaining ring 321 to limit the movement of the lower inertia cylinder 32 relative to the guide rod 31, preventing the lower inertia cylinder 32 from moving excessively and colliding with the mounting shell 5, which is beneficial to extending the service life of the locking assembly 3.

[0058] An avoidance hole 322 is formed in the center of the limit retaining ring 321. When the lower inertia cylinder 32 moves towards the guide rod 31, the guide rod 31 passes through the avoidance hole 322 to ensure the smooth movement of the lower inertia cylinder 32 and prevent the lower inertia cylinder 32 from colliding and interfering with the guide rod 31. The guide rod 31 includes a rod body and a guiding portion. The rod body and the guiding portion are integrally and coaxially connected. The diameter of the rod body is larger than that of the guiding portion, so that a limit step 311 is formed at the connection between the rod body and the guiding portion. The guiding portion passes through the avoidance hole 322 to guide the movement of the lower inertia cylinder 32.

[0059] A limit screw 6 is fixedly installed on the edge of the locking chute 52. As shown in the attached Figure 1 and 2 figure, the limit screw 6 is used to limit the movement of the locking assembly 3. By pressing the upper inertia spring 35, the upper inertia cylinder 34 is kept in contact with the lower inertia cylinder 32, so that the locking assembly 3 stays in the locked position, realizing the fixation of the locking assembly 3 and facilitating the disassembly and assembly of the locking assembly 3. The limit screw 6 is specifically a countersunk head screw, and its head abuts against the top of the upper inertia cylinder 34.

[0060] A closed cover 341 is formed at one end of the upper inertia cylinder 34 away from the lower inertia cylinder 32. The closed cover 341 is used to press the lower inertia spring 33 and limit the excessive sliding of the upper inertia cylinder 34 relative to the lower inertia cylinder 32. The closed cover 341 is provided with a limit boss 342, and the limit boss 342 is integrally arranged at the center of the closed cover 341. When the locking assembly 3 is in the unlocked position, the limit ball 4 falls on the limit boss 342. As shown in the attached Figure 2 figure, the storage of the limit ball 4 is realized.

[0061] A guiding chute 53 is also formed inside the mounting shell 5. The movable contact 2 is slidably disposed in the guiding chute 53 and is used to guide the sliding of the movable contact 2 relative to the fixed contact 1. The guiding chute 53 is perpendicular to the locking chute 52, and the two are separated by an intermediate partition 54. A pushing spring 7 is provided between the movable contact 2 and the guiding chute 53. When the limiting ball 4 moves away from the movable contact 2, the pushing spring 7 restores its elastic deformation from the compressed state, and the pushing spring 7 applies an elastic force to the movable contact 2. The pushing spring 7 pushes the movable contact 2 to slide along the guiding chute 53 towards the fixed contact 1. That is to say, the pushing spring 7 provides support for the sliding of the movable contact 2. Additionally, a spring guide rod 24 is integrally formed at the bottom end of the movable contact 2. The cross-sectional area of the spring guide rod 24 is smaller than the cross-sectional area of the contact body of the movable contact 2, so that a stop step 25 is formed at the connection between the spring guide rod 24 and the contact body. One end of the pushing spring 7 abuts against the stop step 25, and the other end abuts against the bottom of the guiding chute 53.

[0062] A locking notch 21 is formed in the middle section of the movable contact 2. As shown in the appendix Figure 4 When the locking assembly 3 is in the locking position, the limiting ball 4 slides into the locking notch 21, so that a part of the movable contact 2 is embedded into the movable contact 2, ensuring reliable contact between the limiting ball 4 and the movable contact 2, and thus ensuring more secure and reliable locking of the locking assembly 3.

[0063] The inertia switch further includes a circuit board 8 and an end cover 9 connected between the circuit board 8 and the mounting shell 5. The circuit board 8 is provided with a fixing hole 81, and the fixed contact 1 is inserted into the fixing hole 81. The fixed contact 1 can specifically be a spring pin, as shown in the appendix Figure 3 However, its type is not limited to this. A conductive ring 82 is fixedly provided along the edge of the fixing hole 81. As shown in the appendix Figure 6 A plugging groove 22 is formed at one end of the movable contact 2 facing the fixed contact 1. A contact ring 23 is formed along the edge of the plugging groove 22, that is, the positive and negative electrodes of the movable contact 2 are concentrically distributed.

[0064] When the movable contact 2 abuts against the fixed contact 1, the fixed contact 1 is plugged and conducted with the plugging groove 22, and the contact ring 23 abuts and conducts with the conductive ring 82. The conductive ring 82 is the negative electrode, and the fixed contact 1 is the positive electrode. In this way, an independent current loop is formed among the movable contact 2, the fixed contact 1, and the circuit board 8. By optimizing the distribution mode of the positive and negative electrodes of the movable contact 2, the present utility model makes the interior of the inertia switch more compact, the structure simpler, the assembly more convenient, and the manufacturing cost lower.

[0065] The working principle of the inertia switch provided by the present utility model is as follows:

[0066] When the locking assembly 3 is in the locked position, the upper inertia cylinder 34 abuts against the limit screw 6. The upper inertia cylinder 34 and the movable contact 2 of the locking assembly 3 respectively block both ends of the limit raceway 51, causing the limit ball 4 to stay within the limit raceway 51. The locking assembly 3 pushes against the limit ball 4, and the limit ball 4 is inserted into the locking notch 21. The limit ball 4 presses tightly against the movable contact 2, restricting the sliding of the movable contact 2. The movable contact 2 and the fixed contact 1 are separated from each other, and the inertia switch is turned off.

[0067] When the locking assembly 3 is in the unlocked position, the upper inertia cylinder 34 compresses the upper inertia spring 35, and the lower inertia cylinder 32 compresses the lower inertia spring 33. The locking assembly 3 compresses along the locking chute 52, and the locking assembly 3 moves away from the limit raceway 51. One end of the limit raceway 51 away from the movable contact 2 is opened. The limit ball 4 rolls along the limit raceway 51 in the direction away from the movable contact 2, and the locking of the limit ball 4 is released. The movable contact 2 slides towards the fixed contact 1 until the movable contact 2 abuts against the fixed contact 1. The fixed contact 1 is inserted and conducted with the insertion groove 22, and the abutting ring 23 is in abutting conduction with the conductive ring 82. An independent current loop is formed among the movable contact 2, the fixed contact 1, and the circuit board 8, and the inertia switch is turned on.

[0068] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0069] In this article, specific examples are used to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. An inertial switch, characterized in that, Comprising: A fixed contact (1), the fixed contact (1) being fixedly arranged; A movable contact (2), the movable contact (2) being slidably arranged and opposite to the fixed contact (1); A locking assembly (3), the locking assembly (3) being slidably arranged; A limiting ball (4), the limiting ball (4) being arranged in a limiting raceway (51), the limiting raceway (51) being formed between the movable contact (2) and the locking assembly (3); When the locking assembly (3) is in the locked position, the locking assembly (3) pushes the limiting ball (4) to press tightly against the movable contact (2), and the movable contact (2) is separated from the fixed contact (1) so that the two are kept in a disconnected state; When the locking assembly (3) is in the unlocked position, the limiting ball (4) rolls along the limiting raceway (51) in a direction away from the movable contact (2), and the movable contact (2) slides to abut against the fixed contact (1) so that the two are kept in a conducting state.

2. The inertial switch according to claim 1, wherein It further comprises a mounting shell (5) formed with a locking chute (52), and the locking assembly (3) comprises: A guiding rod (31), the guiding rod (31) being fixedly arranged at the bottom of the locking chute (52); A lower inertia cylinder (32), the lower inertia cylinder (32) being coaxially opposite to the guiding rod (31), and the lower inertia cylinder (32) being slidably arranged in the locking chute (52); A lower inertia spring (33), the lower inertia spring (33) being coaxially connected between the lower inertia cylinder (32) and the guiding rod (31), and the lower inertia spring (33) being used for sleeving the lower inertia cylinder (32) on the guiding rod (31) by compression when the lower inertia cylinder (32) bears an inertia force.

3. The inertial switch according to claim 2, characterized in that, The locking assembly (3) further comprises: An upper inertia cylinder (34), the upper inertia cylinder (34) being slidably arranged in the locking chute (52), and the upper inertia cylinder (34) being slidably connected to the lower inertia cylinder (32); An upper inertia spring (35), the upper inertia spring (35) being coaxially connected between the upper inertia cylinder (34) and the lower inertia cylinder (32), and the upper inertia spring (35) being used for sleeving the upper inertia cylinder (34) on the lower inertia cylinder (32) by compression when the upper inertia cylinder (34) bears an inertia force.

4. The inertia switch according to claim 3, characterized in that, A limiting retaining ring (321) is formed on the inner wall of the lower inertia cylinder (32), and both ends of the limiting retaining ring (321) abut against the upper inertia spring (35) and the lower inertia spring (33) respectively; a limiting step (311) is formed on the outer side surface of the guiding rod (31); when the lower inertia cylinder (32) is sleeved on the guiding rod (31), the limiting step (311) abuts against the limiting retaining ring (321) to limit the movement of the lower inertia cylinder (32) relative to the guiding rod (31).

5. The inertial switch according to claim 4, characterized in that, An avoidance hole (322) is formed at the center of the limiting retaining ring (321), and the avoidance hole (322) is used for avoiding the guiding rod (31) when the lower inertia cylinder (32) moves towards the guiding rod (31).

6. The inertial switch according to claim 2, wherein A limit screw (6) is fixedly arranged on the edge of the locking chute (52), and the limit screw (6) is used to limit the movement of the locking assembly (3) so that the locking assembly (3) stays at the locking position.

7. The inertial switch according to claim 3, characterized in that, A closed cover (341) is formed at one end of the upper inertia cylinder (34) away from the lower inertia cylinder (32), and the closed cover (341) is provided with a limit boss (342); when the locking assembly (3) is in the unlocking position, the limit ball (4) falls on the limit boss (342).

8. The inertia switch according to claim 2, characterized in that A guiding chute (53) is further formed in the mounting shell (5), and the movable contact (2) is slidably arranged in the guiding chute (53); a pushing spring (7) is arranged between the movable contact (2) and the guiding chute (53), and the pushing spring (7) is used to push the movable contact (2) to slide along the guiding chute (53) towards the fixed contact (1) when the limit ball (4) is away from the movable contact (2).

9. The inertia switch according to claim 8, characterized in that, A locking notch (21) is formed in the middle section of the movable contact (2); when the locking assembly (3) is in the locking position, the limit ball (4) slides into the locking notch (21).

10. The inertial switch according to claim 8, wherein, It further includes a circuit board (8), the circuit board (8) is provided with a fixing hole (81), and the fixed contact (1) is inserted into the fixing hole (81); a conductive ring (82) is fixedly arranged on the edge of the fixing hole (81); a plugging groove (22) is formed at one end of the movable contact (2) facing the fixed contact (1), and an abutting ring (23) is formed on the edge of the plugging groove (22); when the movable contact (2) abuts against the fixed contact (1), the fixed contact (1) is plugged and conducted with the plugging groove (22), and the abutting ring (23) is abutted and conducted with the conductive ring (82).

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