A filter with high efficiency in heat dissipation

Abstract

The utility model discloses a filter with high efficiency in heat dissipation, which belongs to the technical field of filters. The utility model comprises: a base; a heat sink: the lower surface of the heat sink is fixedly connected to the upper surface of the base; a cover plate: the cover plate is arranged above the heat sink; a heat dissipation mechanism: the heat dissipation mechanism is arranged on the lower surface of the cover plate, and comprises: a first motor: the upper surface of the first motor is arranged below the cover plate; a first fan: the upper surface of the first fan is fixedly connected to the lower surface of the first motor; a clamping assembly: the clamping assembly is arranged on the lower surface of the cover plate; a rotating assembly: the rotating assembly is arranged on the upper surface of the cover plate; a stroke assembly: the stroke assembly is arranged on the surface of the rotating assembly. The utility model solves the problem that high temperature will reduce the service life of the filter and damage internal parts, especially in hot weather, which will accelerate the temperature generated by the filter when it is used, by arranging the heat dissipation mechanism.

Description

Technical Field

[0001] The utility model belongs to the technical field of filters, and in particular relates to a filter with high-efficiency heat dissipation. Background Art

[0002] A filter is an electronic device that selectively passes or blocks signals within a specific frequency range. Filters play an important role in signal processing and are often used to eliminate noise, adjust the frequency response of audio signals, and filter out interference. The working principle of filters is based on the concept of frequency response, that is, signals of different frequencies have different responses to filters. Common working principles of filters include frequency selection and attenuation.

[0003] When the filter is in use, part of the electric energy of the filter is converted into heat energy, which will cause the body to continue to heat up. Long-term high temperature will reduce the service life of the filter and damage the internal parts. Especially in hot weather, the temperature of the filter will be accelerated when it is in use. Therefore, a filter with efficient heat dissipation is proposed to solve the above problems. Utility Model Content

[0004] In response to the problems existing in the prior art, the utility model provides a filter with efficient heat dissipation, which has the advantage of continuously cooling the filter, and solves the problem that long-term high temperature will reduce the service life of the filter and damage internal parts, especially in hot weather, which will accelerate the temperature generated by the filter itself when it is used.

[0005] The utility model is implemented as follows: a filter with high efficiency heat dissipation comprises:

[0006] Base;

[0007] Heat dissipation box: the lower surface of the heat dissipation box is fixedly connected to the upper surface of the base;

[0008] Filter: The filter is fixedly connected to the inner surface of the heat sink;

[0009] Cover plate: the cover plate is arranged above the heat dissipation box;

[0010] Heat dissipation mechanism: The heat dissipation mechanism is arranged on the lower surface of the cover plate, including:

[0011] First motor: the upper surface of the first motor is arranged below the cover plate;

[0012] First fan: the upper surface of the first fan is fixedly connected to the lower surface of the first motor;

[0013] Clamping assembly: the clamping assembly is arranged on the lower surface of the cover plate;

[0014] Rotating assembly: the rotating assembly is arranged on the upper surface of the cover plate;

[0015] Stroke component: the stroke component is arranged on the surface of the rotating component.

[0016] As a preferred embodiment of the present invention, the clamping assemblies are provided with four, and the four clamping assemblies include:

[0017] Clamping groove: the clamping groove is provided on the inner surface of the heat dissipation box;

[0018] Clamping block: the clamping block passes through the inner surface of the heat dissipation box;

[0019] Connecting rod: The opposite side of the connecting rod is fixedly connected to the opposite side of the clamping block.

[0020] As a preferred embodiment of the present invention, the rotating assembly includes:

[0021] Fixed block: the upper surface of the fixed block is fixedly connected to the lower surface of the cover plate;

[0022] First travel groove: four first travel grooves are provided, and the four first travel grooves are all opened on the upper surface of the fixed block, and the outer surface of the connecting rod is slidably connected to the inner surface of the first travel groove;

[0023] Connecting column: There are four connecting columns, and the lower surfaces of the four connecting columns are fixedly connected to the upper surface of the connecting rod;

[0024] Rotating block: the lower surface of the rotating block is rotatably connected to the upper surface of the cover plate through a rotating shaft;

[0025] Rotating rod: The lower surface of the rotating rod is fixedly connected to the upper surface of the rotating block.

[0026] As a preferred embodiment of the present invention, the stroke components are provided with four, and the four stroke components include:

[0027] Second travel rail: the second travel rail is arranged inside the rotating block, the inner surface of the second travel rail contacts the outer surface of the connecting column, and the second travel rail is arc-shaped;

[0028] Second stroke groove: two second stroke grooves are provided, and the two second stroke grooves are opened on the upper surface of the rotating block, and the second stroke grooves are arc-shaped;

[0029] "L"-shaped connecting rod: Two "L"-shaped connecting rods are provided, and opposite sides of the two "L"-shaped connecting rods are fixedly connected to the outer surface of the connecting column, and the lower surface of the "L"-shaped connecting rod is slidably connected to the inner surface of the second stroke groove.

[0030] As a preferred embodiment of the present invention, a heat dissipation component is provided inside the heat dissipation box, and the heat dissipation component includes:

[0031] First sliding groove: two first sliding grooves are provided, and both of the two first sliding grooves are opened on the inner surface of the heat dissipation box;

[0032] Carrying plate: both left and right sides of the carrying plate are slidably connected to the inner surface of the first sliding groove, and a locking assembly is provided on the right end surface of the carrying plate;

[0033] Handle: the right end surface of the handle is fixedly connected to the left end surface of the loading plate;

[0034] Second motor: the lower surface of the second motor is fixedly connected to the upper surface of the carrier plate;

[0035] Second fan: the lower surface of the second fan is fixedly connected to the upper surface of the second motor.

[0036] As a preferred embodiment of the present invention, the positioning assembly includes:

[0037] Clamping slot: the clamping slot is provided on the right end surface of the heat dissipation box;

[0038] Locating block: two of the locating blocks are provided, and the two locating blocks are provided on the right end surface of the loading plate, the left end surface of the locating block contacts the right end surface of the locating slot, and a telescopic component is provided on the opposite side of the locating block;

[0039] Second sliding groove: the second sliding groove is opened on the right end surface of the loading plate, and the left end surface of the positioning block is slidably connected to the inner surface of the second sliding groove.

[0040] As a preferred embodiment of the present invention, the telescopic assembly includes:

[0041] Telescopic rod: the front and rear ends of the telescopic rod are fixedly connected to the opposite side of the positioning block;

[0042] Pressure relief spring: The front and rear ends of the pressure relief spring are fixedly connected to the opposite side of the positioning block, and the pressure relief spring is sleeved on the outer surface of the telescopic rod.

[0043] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0044] 1. The utility model provides a heat dissipation mechanism. When the filter needs to dissipate heat, the staff starts the first motor under the cover plate, and the first motor drives the first fan to rotate, and then the lower surface of the cover plate contacts the upper surface of the heat dissipation box. The staff needs to rotate the rotating rod, and the rotation of the rotating rod drives the rotating block to rotate. Since the outer surface of the connecting column contacts the inner surface of the second stroke rail, the rotation of the rotating block causes the connecting column to move outward along the inner wall of the second stroke rail, and the movement of the connecting column drives the "L"-shaped connecting rod to move outward together. The lower surface of the "L"-shaped connecting rod moves outward along the second stroke groove, and the connecting column drives the connecting rod to move outward along the inner surface of the first stroke groove, and the connecting rod drives the clamping block to move outward until the clamping block enters the clamping groove and is in close contact with the clamping groove, thereby achieving the effect of clamping the cover plate into the upper part of the heat dissipation box and continuously dissipating the heat of the filter inside the heat dissipation box. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic diagram of a three-dimensional structure provided by an embodiment of the utility model;

[0046] Figure 2 yes Figure 1 A local enlarged schematic diagram of the middle A;

[0047] Figure 3 It is a full cross-sectional schematic diagram provided by an embodiment of the utility model;

[0048] Figure 4 yes Figure 3 A local enlarged schematic diagram of point B in the middle.

[0049] In the figure: 1, base; 2, heat sink; 3, filter; 4, cover; 5, heat dissipation mechanism; 510, first motor; 520, first fan; 530, clamping assembly; 531, clamping groove; 532, clamping block; 533, connecting rod; 540, rotating assembly; 541, fixed block; 542, first stroke groove; 543, connecting column; 544, rotating block; 545, rotating rod; 550, stroke assembly; 551, second stroke rail; 552, second stroke groove; 553, "L" shaped connecting rod; 6, heat dissipation assembly; 601, first sliding groove; 602, loading board; 603, handle; 604, second motor; 605, second fan; 7, clamping assembly; 701, clamping groove; 702, clamping block; 703, second sliding groove; 8, telescopic assembly; 801, telescopic rod; 802 pressure relief spring. DETAILED DESCRIPTION

[0050] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0051] The structure of the utility model is described in detail below in conjunction with the accompanying drawings.

[0052] like Figures 1 to 4 As shown, an embodiment of the utility model provides a filter with high efficiency in heat dissipation, comprising:

[0053] Base 1;

[0054] Heat dissipation box 2: the lower surface of the heat dissipation box 2 is fixedly connected to the upper surface of the base 1;

[0055] Filter 3: Filter 3 is fixedly connected to the inner surface of the heat sink 2;

[0056] Cover plate 4: the cover plate 4 is arranged above the heat dissipation box 2;

[0057] Heat dissipation mechanism 5: The heat dissipation mechanism 5 is arranged on the lower surface of the cover plate 4, and includes:

[0058] First motor 510: The upper surface of the first motor 510 is disposed below the cover plate 4;

[0059] First fan 520: The upper surface of the first fan 520 is fixedly connected to the lower surface of the first motor 510;

[0060] The clamping assembly 530: The clamping assembly 530 is disposed on the lower surface of the cover plate 4;

[0061] Rotating assembly 540: The rotating assembly 540 is disposed on the upper surface of the cover plate 4;

[0062] Travel component 550 : The travel component 550 is disposed on the surface of the rotating component 540 .

[0063] refer to Figure 4 As shown, four clamping assemblies 530 are provided, and the four clamping assemblies 530 include:

[0064] Clamping groove 531: The clamping groove 531 is provided on the inner surface of the heat dissipation box 2;

[0065] Clamping block 532: The clamping block 532 penetrates the inner surface of the heat dissipation box 2;

[0066] Connecting rod 533 : The opposite side of the connecting rod 533 is fixedly connected to the opposite side of the clamping block 532 .

[0067] The above scheme is adopted: when the filter 3 needs to dissipate heat, the staff starts the first motor 510 under the cover plate 4, the first motor 510 drives the first fan 520 to rotate, and then the lower surface of the cover plate 4 is contacted with the upper surface of the heat dissipation box 2, and the connecting rod 533 is controlled to move outward, and the connecting rod 533 drives the clamping block 532 to move outward until the clamping block 532 enters the clamping groove 531 and is in close contact with the clamping groove 531.

[0068] refer to Figure 4As shown, the rotating assembly 540 includes:

[0069] Fixed block 541: The upper surface of the fixed block 541 is fixedly connected to the lower surface of the cover plate 4;

[0070] First travel groove 542: four first travel grooves 542 are provided, and the four first travel grooves 542 are all opened on the upper surface of the fixed block 541, and the outer surface of the connecting rod 533 is slidably connected to the inner surface of the first travel groove 542;

[0071] Connecting column 543: There are four connecting columns 543, and the lower surfaces of the four connecting columns 543 are fixedly connected to the upper surface of the connecting rod 533;

[0072] Rotating block 544: The lower surface of the rotating block 544 is rotatably connected to the upper surface of the cover plate 4 via a rotating shaft;

[0073] Rotating rod 545 : The lower surface of the rotating rod 545 is fixedly connected to the upper surface of the rotating block 544 .

[0074] Adopting the above scheme: when the connecting rod 533 needs to move outward, the staff needs to rotate the rotating rod 545. The rotation of the rotating rod 545 drives the rotating block 544 to rotate. The rotation of the rotating block 544 causes the connecting column 543 to move outward. The connecting column 543 drives the connecting rod 533 to move outward along the inner surface of the first stroke groove 542. The fixed block 541 mainly plays the role of supporting the connecting rod 533.

[0075] refer to Figure 2 As shown, four stroke components 550 are provided, and the four stroke components 550 include:

[0076] Second travel rail 551: The second travel rail 551 is disposed inside the rotating block 544, the inner surface of the second travel rail 551 contacts the outer surface of the connecting column 543, and the second travel rail 551 is arc-shaped;

[0077] Second travel groove 552: Two second travel grooves 552 are provided. The two second travel grooves 552 are opened on the upper surface of the rotating block 544, and the second travel grooves 552 are arc-shaped;

[0078] “L”-shaped connecting rod 553: Two “L”-shaped connecting rods 553 are provided, and opposite sides of the two “L”-shaped connecting rods 553 are fixedly connected to the outer surface of the connecting column 543, and the lower surface of the “L”-shaped connecting rod 553 is slidably connected to the inner surface of the second travel groove 552.

[0079] The above scheme is adopted: when the rotating block 544 rotates, since the outer surface of the connecting column 543 contacts the inner surface of the second travel rail 551, the rotating block 544 rotates to make the connecting column 543 move outward along the inner wall of the second travel rail 551, and the movement of the connecting column 543 drives the "L"-shaped connecting rod 553 to move outward together, and the lower surface of the "L"-shaped connecting rod 553 moves outward along the second travel groove 552, so that the connecting column 543 moves more stably along the inner wall of the second travel rail 551.

[0080] refer to Figure 3 As shown, a heat dissipation component 6 is arranged inside the heat dissipation box 2, and the heat dissipation component 6 includes:

[0081] First sliding groove 601: Two first sliding grooves 601 are provided, and both first sliding grooves 601 are opened on the inner surface of the heat dissipation box 2;

[0082] Carrying plate 602: both left and right sides of the carrying plate 602 are slidably connected to the inner surface of the first sliding groove 601, and a locking assembly 7 is provided on the right end surface of the carrying plate 602;

[0083] Handle 603: The right end surface of the handle 603 is fixedly connected to the left end surface of the loading plate 602;

[0084] Second motor 604: The lower surface of the second motor 604 is fixedly connected to the upper surface of the carrier plate 602;

[0085] Second fan 605 : The lower surface of the second fan 605 is fixedly connected to the upper surface of the second motor 604 .

[0086] With the above solution, the staff can start the second motor 604, and the operation of the second motor 604 drives the second fan 605 to rotate. After starting the fan, the staff pushes the handle 603 to slide the outer wall of the carrier plate 602 inward along the inner wall of the first sliding groove 601 until the carrier plate 602 is completely inside the heat dissipation box 2.

[0087] refer to Figure 3 As shown, the positioning assembly 7 includes:

[0088] The latching slot 701 is provided on the right end surface of the heat dissipation box 2;

[0089] The clamping block 702: two clamping blocks 702 are provided, and the two clamping blocks 702 are provided on the right end surface of the loading plate 602, and the left end surface of the clamping block 702 contacts the right end surface of the clamping slot 701, and the telescopic component 8 is provided on the opposite side of the clamping block 702;

[0090] Second sliding groove 703 : The second sliding groove 703 is formed on the right end surface of the loading plate 602 , and the left end surface of the positioning block 702 is slidably connected to the inner surface of the second sliding groove 703 .

[0091] The above scheme is adopted: when the carrier plate 602 moves inward, the carrier plate 602 drives the locking block 702 to move inward together until the upper surface of the locking block 702 contacts the locking groove 701, and the locking block 702 moves inward and is squeezed by the locking groove 701, so that the locking block 702 moves inward along the second sliding groove 703, and the area between the locking blocks 702 is reduced until the area between the locking blocks 702 is smaller than the area of ​​the locking groove 701, and the locking block 702 can pass through the locking groove 701 until the left end face of the locking block 702 is in close contact with the outer surface of the locking groove 701.

[0092] refer to Figure 3 As shown, the telescopic assembly 8 includes:

[0093] Telescopic rod 801: Both front and rear ends of the telescopic rod 801 are fixedly connected to the opposite side of the positioning block 702;

[0094] Compression-relieving spring 802 : The front and rear ends of the compression-relieving spring 802 are fixedly connected to the opposite side of the positioning block 702 , and the compression-relieving spring 802 is sleeved on the outer surface of the telescopic rod 801 .

[0095] The above scheme is adopted: when the blocking block 702 is squeezed and moves inward, the telescopic rod 801 and the pressure-relief spring 802 are squeezed between the blocking blocks 702, so that the telescopic rod 801 is shortened inward and the pressure-relief spring 802 contracts inward. When the blocking block 702 passes through the blocking groove 701, the pressure-relief spring 802 releases its elastic force outward, pushing the blocking block 702 to move outward until the left end face of the blocking block 702 is in close contact with the outer surface of the blocking groove 701.

[0096] The working principle of this utility model:

[0097] During use, when the filter 3 needs to dissipate heat, the staff starts the first motor 510 under the cover plate 4, and the first motor 510 drives the first fan 520 to rotate, and then the lower surface of the cover plate 4 is brought into contact with the upper surface of the heat dissipation box 2. The staff needs to rotate the rotating rod 545, and the rotating rod 545 rotates to drive the rotating block 544 to rotate. Since the outer surface of the connecting column 543 is in contact with the inner surface of the second travel rail 551, the rotating block 544 rotates to make the connecting column 543 move outward along the inner wall of the second travel rail 551. The movement of the connecting column 543 drives the "L"-shaped connecting rod 553 to move outward together, and the lower surface of the "L"-shaped connecting rod 553 moves outward along the second travel groove 552. The connecting column 543 drives the connecting rod 533 to move outward along the inner surface of the first travel groove 542, and the connecting rod 533 drives the clamping block 532 to move outward until the clamping block 532 enters the clamping groove 531 and is in close contact with the clamping groove 531.

[0098] The staff can start the second motor 604, and the operation of the second motor 604 drives the second fan 605 to rotate. After starting the fan, the staff pushes the handle 603 to slide the outer wall of the carrier plate 602 inward along the inner wall of the first sliding groove 601, and the carrier plate 602 drives the blocking block 702 to move inward together until the upper surface of the blocking block 702 contacts the blocking groove 701, and the blocking block 702 moves inward and squeezes the blocking groove 701, so that the blocking block 702 moves inward along the second sliding groove 703, shrinking the card The area between the positioning blocks 702 squeezes the telescopic rod 801 and the pressure-relieving spring 802 between the positioning blocks 702, causing the telescopic rod 801 to shorten inward and the pressure-relieving spring 802 to shrink inward until the area between the positioning blocks 702 is smaller than the area of ​​the positioning slot 701, and the positioning block 702 can pass through the positioning slot 701. After the positioning block 702 passes through the positioning slot 701, the pressure-relieving spring 802 releases its elastic force outward, pushing the positioning block 702 to move outward until the left end face of the positioning block 702 is in close contact with the outer surface of the positioning slot 701.

[0099] To sum up: this filter with high efficiency in heat dissipation, through the base 1, heat dissipation box 2, filter 3, cover plate 4, heat dissipation mechanism 5, heat dissipation assembly 6, positioning assembly 7 and telescopic assembly 8, solves the problem that long-term high temperature will reduce the service life of the filter and damage internal parts, especially in hot weather, which will accelerate the temperature generated by the filter itself when it is used.

[0100] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0101] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A filter with high efficiency heat dissipation, characterized by: include: Base (1); Heat dissipation box (2): the lower surface of the heat dissipation box (2) is fixedly connected to the upper surface of the base (1); Filter (3): the filter (3) is fixedly connected to the inner surface of the heat dissipation box (2); Cover plate (4): the cover plate (4) is arranged above the heat dissipation box (2); Heat dissipation mechanism (5): the heat dissipation mechanism (5) is arranged on the lower surface of the cover plate (4), and comprises: First motor (510): the upper surface of the first motor (510) is arranged below the cover plate (4); First fan (520): the upper surface of the first fan (520) is fixedly connected to the lower surface of the first motor (510); Clamping assembly (530): the clamping assembly (530) is arranged on the lower surface of the cover plate (4); Rotating assembly (540): the rotating assembly (540) is arranged on the upper surface of the cover plate (4); Stroke component (550): the stroke component (550) is arranged on the surface of the rotating component (540).

2. A filter with high efficiency heat dissipation as claimed in claim 1, characterized in that: Four clamping assemblies (530) are provided, and the four clamping assemblies (530) include: Clamping groove (531): the clamping groove (531) is formed on the inner surface of the heat dissipation box (2); Clamping block (532): the clamping block (532) penetrates the inner surface of the heat dissipation box (2); Connecting rod (533): the opposite side of the connecting rod (533) is fixedly connected to the opposite side of the clamping block (532).

3. A filter with high efficiency heat dissipation as claimed in claim 2, characterized in that: The rotating assembly (540) comprises: Fixed block (541): the upper surface of the fixed block (541) is fixedly connected to the lower surface of the cover plate (4); First travel grooves (542): four first travel grooves (542) are provided, and the four first travel grooves (542) are all opened on the upper surface of the fixed block (541), and the outer surface of the connecting rod (533) is slidably connected to the inner surface of the first travel groove (542); Connecting columns (543): four connecting columns (543) are provided, and the lower surfaces of the four connecting columns (543) are fixedly connected to the upper surface of the connecting rod (533); Rotating block (544): the lower surface of the rotating block (544) is rotatably connected to the upper surface of the cover plate (4) via a rotating shaft; Rotating rod (545): the lower surface of the rotating rod (545) is fixedly connected to the upper surface of the rotating block (544).

4. A filter with high efficiency heat dissipation as claimed in claim 3, characterized in that: Four of the stroke components (550) are provided, and the four stroke components (550) include: Second travel rail (551): the second travel rail (551) is disposed inside the rotating block (544), the inner surface of the second travel rail (551) is in contact with the outer surface of the connecting column (543), and the second travel rail (551) is arc-shaped; Second stroke groove (552): two second stroke grooves (552) are provided, and the two second stroke grooves (552) are opened on the upper surface of the rotating block (544), and the second stroke grooves (552) are arc-shaped; "L"-shaped connecting rod (553): Two "L"-shaped connecting rods (553) are provided, and opposite sides of the two "L"-shaped connecting rods (553) are fixedly connected to the outer surface of the connecting column (543), and the lower surface of the "L"-shaped connecting rod (553) is slidably connected to the inner surface of the second travel groove (552).

5. The filter with high efficiency heat dissipation as claimed in claim 1, characterized in that: A heat dissipation component (6) is arranged inside the heat dissipation box (2), and the heat dissipation component (6) comprises: First sliding groove (601): two first sliding grooves (601) are provided, and the two first sliding grooves (601) are both opened on the inner surface of the heat dissipation box (2); Carrying plate (602): the left and right sides of the carrying plate (602) are slidably connected to the inner surface of the first sliding groove (601), and a locking assembly (7) is provided on the right end surface of the carrying plate (602); Handle (603): the right end surface of the handle (603) is fixedly connected to the left end surface of the loading plate (602); A second motor (604): the lower surface of the second motor (604) is fixedly connected to the upper surface of the carrier plate (602); Second fan (605): the lower surface of the second fan (605) is fixedly connected to the upper surface of the second motor (604).

6. A filter with high efficiency heat dissipation as claimed in claim 5, characterized in that: The positioning component (7) comprises: Positioning groove (701): the positioning groove (701) is provided on the right end surface of the heat dissipation box (2); A locking block (702): two locking blocks (702) are provided, and the two locking blocks (702) are arranged on the right end surface of the loading plate (602), the left end surface of the locking block (702) is in contact with the right end surface of the locking groove (701), and a telescopic component (8) is arranged on the opposite side of the locking block (702); Second sliding groove (703): the second sliding groove (703) is opened on the right end surface of the loading plate (602), and the left end surface of the positioning block (702) is slidably connected to the inner surface of the second sliding groove (703).

7. A filter with high efficiency heat dissipation as claimed in claim 6, characterized in that: The telescopic assembly (8) comprises: Telescopic rod (801): the front and rear ends of the telescopic rod (801) are fixedly connected to the opposite side of the locking block (702); Pressure relief spring (802): the front and rear ends of the pressure relief spring (802) are fixedly connected to the opposite side of the locking block (702), and the pressure relief spring (802) is sleeved on the outer surface of the telescopic rod (801).

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