Kitchen faucet

Abstract

The utility model discloses a kitchen faucet which comprises an installation base, a supporting pipe fixedly connected to the installation base and a control valve arranged on the installation base, the lower end of the supporting pipe is communicated with the water outlet end of the control valve, the upper end of the supporting pipe is rotationally connected with a corrugated pipe, the supporting pipe is communicated with the corrugated pipe, and a supporting structure is arranged at the upper end of the supporting pipe. The supporting structure limits the position of the corrugated pipe away from one end of the supporting pipe. According to the kitchen faucet, the corrugated pipe serves as the bent pipe of the faucet, the supporting structure used for supporting and limiting the water outlet end of the corrugated pipe is arranged, the position of the water outlet end of the corrugated pipe can be adjusted in the horizontal direction and the vertical direction according to the actual use condition, and use is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of faucets, in particular to a kitchen faucet. Background Art

[0002] A faucet is a device used to control the opening and closing of water flow and the size of the flow rate. It is usually installed on the water supply pipe system in a home, commercial place or industrial environment. It is used to provide convenient water access in the kitchen, bathroom sink, bathtub, washing machine, etc. The existing kitchen faucet usually has a rotatable elbow on the upper part of the faucet to facilitate the use of a double-compartment sink.

[0003] For example, the patent application with publication number CN218025655U discloses a single-filter faucet, including a main body mechanism, a mounting mechanism, a splash-proof mechanism and a control mechanism, wherein the mounting mechanism is located at the lower part of the main body mechanism, the splash-proof mechanism is located at the lower part of the main body mechanism, and the control mechanism is located at the lower part of the main body mechanism; the main body mechanism includes a main valve, a filter, a water outlet pipe, a non-woven fabric, a zeolite filter layer and a coconut shell activated carbon filter layer, wherein the filter is movably mounted at the upper end of the main body valve, the water outlet pipe is movably mounted at the upper end of the filter, the non-woven fabric is fixedly mounted at the upper and lower ends of the filter, the zeolite filter layer is fixedly mounted at the inside of the filter, and the coconut shell activated carbon filter layer is fixedly mounted at the upper end of the zeolite filter layer. The single-filter faucet, by providing a filtering structure at the upper end of the main body valve, can filter the tap water passing through the filter, absorb impurities and heavy metals in the filtered water, and ensure drinking water safety.

[0004] During use, the water outlet of the existing faucet can only be adjusted in a circle. When a higher container such as a bucket is needed to collect water, the bucket needs to be tilted, which is inconvenient to operate. Moreover, when cleaning the pool, the position of the faucet cannot be adjusted to align with the position that needs to be flushed, which is inconvenient to operate. Utility Model Content

[0005] The utility model aims to provide a kitchen faucet.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A kitchen faucet comprises a mounting seat, to which a support pipe is fixedly connected, a control valve is arranged on the mounting seat, the lower end of the support pipe is connected to a water outlet end of the control valve, the upper end of the support pipe is rotatably connected to a bellows, the support pipe and the bellows are connected to each other, and a support structure is arranged on the upper end of the support pipe, the support structure limits the position of the bellows away from one end of the support pipe.

[0008] In the kitchen faucet, a water outlet regulating head is installed at one end of the bellows away from the supporting tube, and the supporting structure is detachably connected to the water outlet regulating head.

[0009] The above-mentioned kitchen faucet, the supporting structure includes a fixing sleeve and a supporting rod, the fixing sleeve is sleeved on the outside of the water outlet regulating head, one end of the supporting rod is rotatably connected to the supporting pipe, and the other end of the supporting rod is detachably connected to the fixing sleeve.

[0010] The above kitchen faucet has a connecting block installed on the fixing sleeve, a clamping assembly is provided on the connecting block, one end of the support rod away from the support tube is inserted into the connecting block, and the clamping assembly restricts the end of the support rod inside the connecting block.

[0011] The above-mentioned kitchen faucet, the support rod includes a first rod and a second rod, one end of the first rod is rotatably installed on the outer wall of the support tube, one end of the second rod is slidably connected to the first rod, and the other end of the second rod extends into the interior of the connecting block and cooperates with the clamping assembly.

[0012] The above-mentioned kitchen faucet, the snap-on assembly includes an adjusting pin slidably mounted on the connecting block, one end of the adjusting pin penetrates to the outside of the connecting block, and the end of the adjusting pin in the connecting block is fixedly connected to a stopper, and the end of the second rod away from the supporting tube extends upward with a protrusion, and the stopper blocks the position of the protrusion so that the second rod remains connected to the connecting block.

[0013] In the above-mentioned kitchen faucet, a first spring is arranged in the connecting block to maintain the relative position of the adjusting pin and the connecting block, a pressing block is arranged at one end of the adjusting pin outside the connecting block, the first spring is in contact with the pressing block, and when the first spring is in a natural state, the stopper restricts the protrusion to be inside the connecting block.

[0014] The kitchen faucet has a first rod that is U-shaped, a second rod that extends from an opening of the first rod into the inner side of the first rod, and guide columns are fixedly connected to both sides of the second rod. A guide groove is provided on the inner side of the first rod along its length direction, and the width of the guide groove is equal to the diameter of the guide column.

[0015] In the kitchen faucet, a locking member is arranged on the second rod, and the locking member limits the relative position of the second rod and the first rod.

[0016] The above-mentioned kitchen faucet, the locking member includes a gear rod arranged along the axial direction of the guide column, an adjusting rod is installed inside the second rod along its own axial sliding, a wedge is provided at one end of the adjusting rod located on the inner side of the first rod, one end of the gear rod corresponding to the wedge is wedge-shaped and cooperates with the wedge, a second spring for maintaining the relative position of the adjusting rod and the second rod is provided in the second rod, a third spring for maintaining the relative position of the gear rod and the guide column is provided in the guide column, the depth of the guide groove is greater than the length of the guide column, and a rack matching the gear rod is provided in the guide groove along the length direction of the second rod.

[0017] In the above technical scheme, the kitchen faucet provided by the utility model adopts a bellows as the curved pipe of the faucet, and provides a supporting structure for supporting and limiting the water outlet end of the bellows, so that the water outlet end of the bellows can be adjusted in the horizontal and vertical directions according to actual usage conditions, which is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of the structure provided for an embodiment of the utility model;

[0020] Figure 2 A cross-sectional view of a support rod provided in an embodiment of the utility model;

[0021] Figure 3 A schematic diagram of the positional relationship between the stopper and the protrusion provided in an embodiment of the utility model;

[0022] Figure 4 An enlarged schematic diagram of a second rod provided in an embodiment of the utility model;

[0023] Figure 5 The embodiment of the utility model provides Figure 2 The enlarged schematic diagram at A in the middle;

[0024] Figure 6 The embodiment of the utility model provides Figure 2 Enlarged schematic diagram of point B in the middle.

[0025] Description of reference numerals:

[0026] 1. Mounting seat; 11. Control valve; 2. Support pipe; 3. Bellows; 31. Water outlet regulating head; 4. Support rod; 401. First rod; 402. Second rod; 403. Bump; 404. Guide column; 405. Guide groove; 41. Fixing sleeve; 42. Connecting block; 5. Snap-fit ​​assembly; 51. Adjusting pin; 52. Stop block; 53. Pressing block; 54. First spring; 6. Locking piece; 61. Tooth rod; 62. Adjusting rod; 621. Wedge block; 63. Second spring; 64. Third spring; 65. Rack. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0028] In the description of the present utility model, unless otherwise specified, "multiple" means two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] like Figure 1-Figure 6 As shown, a kitchen faucet provided by an embodiment of the utility model includes a mounting base 1, a supporting tube 2 is fixedly connected to the mounting base 1, a control valve 11 is arranged on the mounting base 1, the lower end of the supporting tube 2 is connected to the water outlet end of the control valve 11, a bellows 3 is rotatably connected to the supporting tube 2, the supporting tube 2 and the bellows 3 are connected to each other, and a supporting structure is arranged on the upper end of the supporting tube 2, the supporting structure limits the position of the bellows 3 away from one end of the supporting tube 2.

[0030] Furthermore, a water outlet regulating head 31 is installed at one end of the bellows 3 away from the supporting tube 2 , and the supporting structure is detachably connected to the water outlet regulating head 31 .

[0031] Specifically, the mounting seat 1 is fixedly installed at the mounting hole reserved on the pool, and the mounting seat 1 is used to support the support pipe 2 and install the control valve 11. In order to facilitate the adjustment of the water outlet shape, a water outlet regulating head 31 is installed at the water outlet end of the bellows 3, wherein the control valve 11 and the water outlet regulating head 31 are both control valves 11 of existing faucets, which can be directly applied without further elaboration. The bellows 3 is rotatably installed on the upper part of the support pipe 2, and the bellows 3 rotates around the central axis of the support pipe 2; the supporting structure is used to limit the position of the water outlet regulating head 31 to avoid the water outlet regulating head 31 from being displaced due to vibration or force from the water flow when the water outlet is too large. Optionally, the supporting structure is a rod, one end of the rod is fixed to the outer wall of the support pipe 2, and the other end of the rod is detachably connected to the water outlet regulating head 31 by bolts; when it is necessary to adjust the position of the water outlet regulating head 31, remove the connecting bolts between the rod and the water outlet regulating head 31 to adjust the position of the water outlet regulating head 31.

[0032] The kitchen faucet provided in the embodiment of the utility model adopts a bellows 3 as the curved pipe of the faucet, and provides a supporting structure for supporting and limiting the water outlet end of the bellows 3, so that the water outlet end of the bellows 3 can be adjusted in the horizontal and vertical directions according to actual usage conditions, which is more convenient to use.

[0033] In another embodiment of the present invention, the support structure includes a fixing sleeve 41 and a support rod 4. The fixing sleeve 41 is sleeved on the outside of the water outlet regulating head 31. One end of the support rod 4 is rotatably connected to the support tube 2, and the other end of the support rod 4 is detachably connected to the fixing sleeve 41.

[0034] Furthermore, a connecting block 42 is installed on the fixing sleeve 41. Preferably, the connecting block 42 is rotatably connected to the fixing sleeve 41. A clamping assembly 5 is provided on the connecting block 42. One end of the support rod 4 away from the support tube 2 is inserted into the connecting block 42. The clamping assembly 5 restricts the end of the support rod 4 inside the connecting block 42.

[0035] Furthermore, the support rod 4 includes a first rod 401 and a second rod 402, one end of the first rod 401 is rotatably mounted on the outer wall of the support tube 2, the second rod 402 rotates around the central axis of the support tube 2, one end of the second rod 402 is slidingly connected to the first rod 401, and the other end of the second rod 402 extends into the interior of the connecting block 42 and cooperates with the snap-on assembly 5.

[0036] Furthermore, the clamping assembly 5 includes an adjusting pin 51 slidably mounted on the connecting block 42, one end of the adjusting pin 51 passes through the outside of the connecting block 42, and the end of the adjusting pin 51 in the connecting block 42 is fixedly connected to a stopper 52, and a protrusion 403 extends upward from one end of the second rod 402 away from the supporting tube 2, and the stopper 52 blocks the position of the protrusion 403 so that the second rod 402 remains connected to the connecting block 42.

[0037] Furthermore, a first spring 54 is provided in the connecting block 42 for maintaining the relative position of the adjusting pin 51 and the connecting block 42. A pressing block 53 is provided at one end of the adjusting pin 51 outside the connecting block 42. The first spring 54 is in contact with the pressing block 53. When the first spring 54 is in a natural state, the stop block 52 limits the protrusion 403 to be inside the connecting block 42.

[0038] Furthermore, the first rod 401 is U-shaped, the second rod 402 extends into the inner side of the first rod 401 from the opening of the first rod 401, and guide columns 404 are fixedly connected to both sides of the second rod 402. A guide groove 405 is opened on the inner side of the first rod 401 along its own length direction, and the width of the guide groove 405 is equal to the diameter of the guide column 404.

[0039] Specifically, in the above embodiment, the supporting structure is a rod, and the rod is fixed to the limiting position of the water outlet regulating head 31, that is, the water outlet regulating head 31 can only be supported by the supporting structure when it is at the position of the end of the rod. When the water outlet regulating head 31 is adjusted to other positions, it is necessary to hold the water outlet regulating head 31 for use, and it is inconvenient to use bolts to connect the water outlet regulating head 31 to the rod; in this embodiment, the supporting structure includes a supporting rod 4, which is also the rod in the above embodiment. The supporting rod 4 is composed of a first rod 401 and a second rod 402, wherein the top view of the first rod 401 is U-shaped, and the second rod 402 extends from the opening of the first rod 401 into the inner side of the first rod 401, and the two sides of the second rod 402 are also Figure 2 The upper and lower sides in the view are fixedly connected with guide columns 404, and the inner side of the first rod 401 is provided with a guide groove 405 along its own length direction. The guide groove 405 limits and guides the guide column 404, so that the first rod 401 can slide along the length direction of the second rod 402. The guide column 404 is cylindrical. While the second rod 402 is adjusted in position along the length direction of the second rod 402, the second rod 402 can also rotate around the central axis of the guide column 404, so that the end of the second rod 402 connected to the connecting block 42 can adapt to the position change of the water outlet regulating head 31, thereby maintaining the supporting effect on the water outlet regulating head 31.

[0040] On the other hand, an adjusting pin 51 is provided in the connecting block 42, and the adjusting pin 51 is arranged along the width direction of the connecting block 42, that is, Figure 2 The adjusting pin 51 is arranged in the vertical direction in the view, and can slide along its own axial direction in the connecting block 42, and adjust the position of the stopper 52 fixed at one end in the connecting block 42, and the end of the second rod 402 in the connecting block 42 is moved toward the side where the stopper 52 is located, that is, Figure 1 A protrusion 403 is formed extending upward in the figure. Preferably, the clamping assembly 5 is symmetrically arranged about the connecting block 42, such as Figure 2 As shown, there are two groups of protrusions 403 on the second rod 402, which correspond to the blocks 52 in one group of the clamping assembly 5 respectively, and there is a gap between the two protrusions 403. When the adjusting pin 51 is pressed by the pressing block 53 to make the adjusting pin 51 slide into the inside of the connecting block 42, the block 52 moves toward the middle of the second rod 402 and gradually staggers with the protrusion 403 until the block 52 completely corresponds to the gap between the two protrusions 403. The block 52 no longer blocks the corresponding protrusion 403. At this time, the end of the second rod 402 can be moved out of the connecting block 42. It should be noted that in order to avoid the setting of the adjusting pin 51 blocking the protrusion 403 from moving to the outside of the connecting block 42, as shown in FIG. Figure 3 As shown, the adjusting pin 51 is arranged above the protrusion 403, and the stopper 52 is disposed on the surface of the second rod 402, that is, Figure 3The lower part in the view extends to correspond to the protrusion 403 to achieve blocking of the protrusion 403. The gap between the two protrusions 403 is greater than or equal to the sum of the axial dimensions of the two blocks 52 along the adjusting pin 51, so that when the two blocks 52 move to contact each other, the protrusion 403 will not be blocked from moving to the outside of the connecting block 42.

[0041] In another embodiment of the present invention, a locking member 6 is disposed on the second rod 402 , and the locking member 6 limits the relative position of the second rod 402 and the first rod 401 .

[0042] Furthermore, the locking member 6 includes a gear rod 61 arranged axially along the guide column 404, an adjusting rod 62 is installed inside the second rod 402 along its own axial sliding direction, a wedge block 621 is provided at one end of the adjusting rod 62 located on the inner side of the first rod 401, and the end of the gear rod 61 corresponding to the wedge block 621 is wedge-shaped and cooperates with the wedge block 621, a second spring 63 for maintaining the relative position of the adjusting rod 62 and the second rod 402 is provided in the second rod 402, a third spring 64 for maintaining the relative position of the gear rod 61 and the guide column 404 is provided in the guide column 404, the depth of the guide groove 405 is greater than the length of the guide column 404, and a rack 65 cooperating with the gear rod 61 is provided in the guide groove 405 along the length direction of the second rod 402.

[0043] Specifically, since the first rod 401 is slidably connected to the second rod 402, when the position of the water outlet regulating head 31 is limited, the first rod 401 and the second rod 402 will move relative to each other due to the vibration when the water is discharged, thereby causing the position of the water outlet regulating head 31 to shift and fail to maintain the optimal use angle; in this embodiment, a locking member 6 is provided on the second rod 402, and the locking member 6 includes a locking member 6 along the length direction of the second rod 402, that is, Figure 2 The adjusting rod 62 is arranged in the horizontal direction in the figure, and one end of the adjusting rod 62 is connected to one end of the connecting block 42 by the second rod 402. Figure 2 The left end of the view extends out, and a second spring 63 is arranged in the second rod 402 to maintain the relative position of the adjusting rod 62 and the second rod 402. Optionally, a cylindrical first cavity with a diameter larger than the adjusting rod 62 is opened in the second rod 402, and a second spring 63 is arranged in the first cavity. The second spring 63 is sleeved on the outside of the adjusting rod 62. The part of the adjusting rod 62 in the first cavity is formed with a first disc along its own axial direction. The first disc is at the end of the first cavity away from the connecting block 42, that is, Figure 2At the right end of the view, one end of the second spring 63 is fixedly connected to the inner wall of the second rod 402, and the other end of the second spring 63 is fixedly connected to the first disc. When the second spring 63 is in a natural state, the adjusting rod 62 is pulled by the second spring 63 and extends from one end of the second rod 402 corresponding to the connecting block 42. At the same time, the two guide columns 404 are each provided with a gear rod 61 along their own axial direction. The gear rod 61 is composed of a cylinder and a gear fixedly connected to each other. The end where the gear is located extends out from the guide column 404, and one end of the cylinder is wedge-shaped. The end of the adjusting rod 62 is fixedly connected to a wedge block 621 that matches the gear rod 61. The matching state of the gear rod 61 and the wedge block 621 is as shown in FIG. Figure 6 shown.

[0044] When the second rod 402 is connected to the connecting block 42, the pressing block 53 is pressed against the surface of the connecting block 42, so that the adjusting pin 51 slides toward the inside of the connecting block 42 until the two blocks 52 contact and do not block the protrusion 403, and the end of the second rod 402 extends into the inside of the connecting block 42. During this process, the adjusting rod 62 extending from the second rod 402 is restricted by the inner wall of the connecting block 42 and gradually shrinks into the inside of the second rod 402. While the adjusting rod 62 pulls the second spring 63 to extend, it also pushes the two toothed rods 61 to slide outward along the axial direction of the adjusting column through the wedge block 621. Since the guide groove 405 on the first rod 401 is provided with a rack 65 that cooperates with the toothed rod 61, the toothed rod 61 is When the rod 61 extends outward, it meshes with the rack 65. When the second rod 402 is fully inserted into the connecting block 42, the pressure on the pressing block 53 is released. At this time, the first spring 54 pushes the adjusting pin 51 to slide from the inside of the connecting block 42 to the outside until the stopper 52 corresponds to the protrusion 403, that is, the stopper 52 forms a block for the protrusion 403. At this time, the second rod 402 is restricted by the stopper 52 and cannot move from the inside of the connecting block 42 to the outside, that is, the connection between the second rod 402 and the connecting block 42 is achieved. On the other hand, the gear meshes with the rack 65, and the second rod 402 cannot move relative to the first rod 401, thereby locking the relative position and relative angle of the first rod 401 and the second rod 402.

[0045] A second cylindrical cavity is formed in the guide column 404, and a second disc is formed along the circumference of the portion of the gear rod 61 in the second cavity. The second disc is arranged at one end of the second cavity close to the wedge block 621, and the third spring 64 is sleeved on the outside of the gear rod 61. When it is necessary to adjust the angle of the second rod 402 relative to the first rod 401, the pressing block 53 is pressed against the surface of the connecting block 42 to make the adjusting pin 51 slide toward the inside of the connecting block 42 until the two blocks 52 contact and do not block the protrusion 403, and then the end of the second rod 402 is moved out of the connecting block 42. During this process, the second spring 63 pulls the adjusting rod 62 to extend from the end of the second rod 402 corresponding to the connecting block 42. At the same time, the third spring 64 pushes the second disc to shrink the gear rod 61 to the inside of the guide column 404. When the gear rod 61 is completely separated from the rack 65, the second rod 402 can be rotated to adjust its position and angle.

[0046] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A kitchen faucet, comprising a mounting base, a support pipe fixedly connected to the mounting base, a control valve arranged on the mounting base, the lower end of the support pipe being connected to the water outlet end of the control valve, characterized in that: The upper end of the support pipe is rotatably connected with a bellows, the support pipe and the bellows are communicated with each other, and a support structure is arranged at the upper end of the support pipe, the support structure limits the position of the bellows away from one end of the support pipe.

2. A kitchen faucet according to claim 1, characterized in that: A water outlet regulating head is installed at one end of the corrugated pipe away from the supporting pipe, and the supporting structure is detachably connected to the water outlet regulating head.

3. A kitchen faucet according to claim 2, characterized in that: The supporting structure comprises a fixing sleeve and a supporting rod. The fixing sleeve is sleeved on the outside of the water outlet regulating head. One end of the supporting rod is rotatably connected to the supporting pipe, and the other end of the supporting rod is detachably connected to the fixing sleeve.

4. A kitchen faucet according to claim 3, characterized in that: A connecting block is installed on the fixing sleeve, a clamping assembly is arranged on the connecting block, one end of the supporting rod away from the supporting tube is plugged into the connecting block, and the clamping assembly restricts the end of the supporting rod inside the connecting block.

5. A kitchen faucet according to claim 4, characterized in that: The support rod includes a first rod and a second rod. One end of the first rod is rotatably mounted on the outer wall of the support tube, one end of the second rod is slidably connected to the first rod, and the other end of the second rod extends into the interior of the connecting block and cooperates with the clamping assembly.

6. A kitchen faucet according to claim 5, characterized in that: The clamping assembly includes an adjusting pin slidably mounted on the connecting block, one end of the adjusting pin passes through the outside of the connecting block, and the end of the adjusting pin inside the connecting block is fixedly connected to a stopper, and the end of the second rod away from the supporting tube extends upward with a protrusion, and the stopper blocks the position of the protrusion so that the second rod remains connected to the connecting block.

7. A kitchen faucet according to claim 6, characterized in that: A first spring is provided in the connecting block to maintain the relative position of the adjusting pin and the connecting block. A pressing block is provided at one end of the adjusting pin outside the connecting block. The first spring contacts the pressing block. When the first spring is in a natural state, the stopper restricts the protrusion to be inside the connecting block.

8. A kitchen faucet according to claim 7, characterized in that: The first rod is U-shaped, the second rod extends into the inner side of the first rod from the opening of the first rod, and guide columns are fixed on both sides of the second rod. A guide groove is opened inside the first rod along its length direction, and the width of the guide groove is equal to the diameter of the guide column.

9. A kitchen faucet according to claim 8, characterized in that: A locking piece is arranged on the second rod, and the locking piece limits the relative position of the second rod and the first rod.

10. A kitchen faucet according to claim 9, characterized in that: The locking member includes a gear rod arranged along the axial direction of the guide column, an adjusting rod is installed inside the second rod along its own axial sliding manner, a wedge is provided at one end of the adjusting rod located on the inner side of the first rod, one end of the gear rod corresponding to the wedge is wedge-shaped and cooperates with the wedge, a second spring for maintaining the relative position of the adjusting rod and the second rod is provided in the second rod, a third spring for maintaining the relative position of the gear rod and the guide column is provided in the guide column, the depth of the guide groove is greater than the length of the guide column, and a rack matching the gear rod is provided in the guide groove along the length direction of the second rod.

Images