Micro-motion drawer synchronous rebounder

Abstract

The application discloses a micro-motion drawer synchronous rebounder, which is characterized by comprising a main body, a first slide channel being internally hollowed in the main body, a rebounding sliding block being installed in the first slide channel, a tension spring being arranged between the rebounding sliding block and the main body, the tension spring always pulling the rebounding sliding block in an outward direction, a rebounding hanging block being hingedly installed on the rebounding sliding block, a first hook and a second hook being arranged on the rebounding hanging block, the first hook being slidably arranged on the side wall of a first guide table in the main body, the inner end of the first guide table being connected with a locking block, and the first hook being hung on the locking block when the drawer is closed. The application has the beneficial effect that a first torsion spring is installed in the main body, one supporting leg of the first torsion spring extends into the locking block, and the first torsion spring always pushes the first hook in a separating direction, so that when the rebounding is triggered, the first hook only needs to be slightly separated from the locking block, the first hook is pushed away from the locking block by the first torsion spring, and the rebounding is triggered.

Description

Technical Field

[0001] This invention relates to a household hardware accessory, specifically a micro-motion drawer synchronous rebound device. Background Technology

[0002] Currently, the main types of drawer slides installed in furniture, cabinets, and drawers are pull-out or push-to-open slides. Pull-out drawer slides are operated by pulling the drawer, causing it to slide along the slide. Push-to-open drawer slides, on the other hand, are activated by pushing the drawer inward a certain distance, triggering a pop-out mechanism that automatically ejects the drawer. They are very convenient to use, and push-to-open drawer slides also prevent children from opening the drawers, offering a higher level of safety. Therefore, push-to-open drawer slides are becoming increasingly widely used.

[0003] The key component of a push-to-rebound drawer slide is the rebound mechanism (or rebound device), which generally consists of a slider base, a slider, an elastic element, and a striker. The slider is installed inside the slider base, and the elastic element is installed between the slider base and the slider. There is usually a groove and a hook between the slider base and the slider to cooperate. The position of the slider in the slider base is controlled by the different positions of the hook in the groove. For example, Chinese Patent No. ZL201711397400.0, published on May 4, 2018, entitled "A Force-Saving Press-and-Rebound Mechanism for Furniture," relates to a force-saving press-and-rebound mechanism for furniture. This mechanism includes a press-and-rebound device, which at least includes a rebound bracket and a pushing element. The pushing element is positioned and / or slides on the rebound bracket, which has a heart-shaped groove. The pushing element has a sliding part and a sliding element, with the sliding element slidably mounted on the pushing element. The pushing element is positioned on the rebound bracket, and when the sliding element slides on the pushing element, it acts on the sliding part. The sliding part slides along the trajectory of the heart-shaped groove in a sequential direction, driving the pushing element to slide on the rebound bracket. This press-and-rebound mechanism allows drawer slides to rebound open after being pressed, improving ease of use.

[0004] However, in order to trigger the rebound device, a certain gap needs to be left between the drawer panel and the cabinet body. This gap is usually 2-5 mm, which results in a large gap after the drawer is closed, leading to poor drawer sealing. Therefore, it is necessary to make further improvements. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a micro-motion drawer synchronous rebound device that is simple in structure, easy to use, has a small trigger stroke, and is conducive to maintaining the airtightness and aesthetics of the drawer.

[0006] The purpose of this invention is achieved in the following way: a micro-motion drawer synchronous rebound device, characterized in that: it includes a main body, a first slide rail is provided in the hollow interior of the main body, a rebound slider is installed in the first slide rail, a tension spring is provided between the rebound slider and the main body, and the tension spring pulls the rebound slider to always pull the rebound slider outward.

[0007] A rebound block is hinged to the rebound slider. The rebound block is provided with a first hook and a second hook. The first hook slides on the side wall of the first guide platform inside the main body. A locking block is connected to the inner end of the first guide platform. When the drawer is closed, the first hook is hooked on the locking block.

[0008] The main body is also equipped with a first torsion spring, one of the support legs of the first torsion spring extending into the locking block, and always pushing the first hook in the separation direction;

[0009] The main body is further provided with a second slide rail, in which a first slider is slidably mounted. The first slider has a protrusion extending out of the main body from its side wall. A release arm is also hinged to the first slider, with its middle part hinged to the first slider. One end of the release arm has a locking arm extending out of the main body, and a locking area is formed between the locking arm and the protrusion. A hook block located on the guide rail is clamped in the locking area and moves in conjunction with the first slider. The other end of the locking arm is provided with a guide block that slides in a third or fourth slide rail that is interconnected within the main body.

[0010] The first slide rail is parallel to the second slide rail, and the third slide rail is inclined to the second slide rail. When the guide block slides in the second slide rail, it drives the locking arm and the hook block to form a locking area. When the guide block is in the third slide rail, it drives the locking arm to retract inward to open the locking area.

[0011] The inner wall of the first slider is also hinged with a drive arm, which is connected to the second hook. When the guide rail is closed, the first slider pushes the rebound block inward and to the right, generating the power to push the rebound block to deflect towards the locking block.

[0012] The first slider is also equipped with a second torsion spring. One of the support legs of the second torsion spring extends into the movement trajectory of the guide block and the resistance arm at the tail of the drive arm. The second torsion spring pushes the guide block to move, forcing the drive locking arm and the hook block to form a locking area.

[0013] The second and third slides are arranged in an L-shape.

[0014] The locking block is installed in the main body in a swing-type hinge. Its inner end is provided with a locking groove that is connected to the first hook. Its outer end is provided with a synchronizing arm that is linked with a synchronizing mechanism. The synchronizing mechanism drives the locking block to swing through the synchronizing arm, so as to realize the separation of the locking groove from the first hook.

[0015] The synchronization mechanism includes a synchronization groove disposed within the main body, and a synchronization slider is slidably installed within the synchronization groove. Under the push of the synchronization spring, the synchronization slider always moves toward the locking block, forcing the synchronization slider to press against the side wall of the synchronization arm, thereby restricting the swing of the synchronization arm.

[0016] The synchronization mechanism also includes a rotatably mounted synchronization gear inside the main body. One end of the synchronization gear is connected to a synchronization rod, which is connected to the synchronization gear of the rebound device on the other side. The synchronization gear meshes with a synchronization rack set on the synchronization slider.

[0017] The synchronization mechanism also includes a synchronization hook disposed on the side wall of the rebound slider. Correspondingly, a synchronization block is connected to the synchronization slider via an elastic arm. When the synchronization slider rebounds, the synchronization hook pulls the synchronization block outward.

[0018] The main body is also provided with a synchronous reset groove and a synchronous trip groove that are interconnected. The synchronous pull block slides in the synchronous reset groove or the synchronous trip groove, driving the synchronous pull block to engage or disengage with the synchronous hook.

[0019] The inner end of the synchronous hook is provided with an inclined reset slope. When the rebound slider moves inward, the reset slope is pressed against the synchronous pull block. After the elastic arm is deformed, the synchronous pull block and the synchronous hook are re-engaged.

[0020] The outer end of the first slider is provided with a reset hook that is connected to a reset block located at the bottom of the rebound slider, which pushes the rebound slider to move inward and release the rebound.

[0021] The beneficial effects of this invention are: 1. Simple structure, low production cost, and improved market competitiveness. 2. A first torsion spring is installed inside the main body, and one of the supporting legs of the first torsion spring extends into the locking block, always pushing the first hook in the separation direction. Therefore, when triggering the rebound, only a slight separation between the first hook and the locking block is needed for the torsion spring to push the first hook and the locking block apart, thus triggering the rebound. The short trigger stroke helps maintain the drawer's sealing. 3. The rebound device has a built-in synchronization device, which can trigger both left and right rebound devices simultaneously, allowing users to operate the drawer by pressing any position on the drawer panel when opening the drawer, improving user convenience. Attached Figure Description

[0022] Figure 1 This is a rendering of the assembly of the invention and the drawer slides.

[0023] Figure 2 , 3 This is a schematic diagram of the structure after the guide rail is hidden in this invention.

[0024] Figure 4 , 5This is a schematic diagram of the rebounder in the locked state in this invention.

[0025] Figure 6 , 7 This is a schematic diagram of the bouncer in the triggered state in this invention.

[0026] Figure 8 , 9 This is a schematic diagram of the bouncer in the synchronized device linkage trigger state in this invention.

[0027] Figure 10 This is a schematic diagram of the rebounder in the rebound state in this invention.

[0028] Figure 11 This is a schematic diagram showing the separation state of the rebounder and the hook block on the guide rail in this invention.

[0029] Figure 12 This is a schematic diagram showing the reset of the rebound slider when the rebound device is closed in this invention.

[0030] Figure 13 , 14 This is an assembly diagram of the structure of the present invention. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the accompanying drawings. A micro-motion drawer synchronous rebound device is characterized in that: it includes a main body 1, the main body 1 is hollow and a first slide rail 11 is provided therein, a rebound slider 2 is installed in the first slide rail 11, a tension spring 21 is provided between the rebound slider 2 and the main body 1, and the tension spring 21 pulls the rebound slider 2 to always pull the rebound slider 2 outward;

[0032] The rebound slider 2 is hinged to a rebound block 3, and the rebound block 3 is provided with a first hook 31 and a second hook 32. The first hook 31 slides on the side wall of the first guide platform 33 inside the main body 1. The inner end of the first guide platform 33 is connected to a locking block 4. When the drawer is closed, the first hook 31 is hooked on the locking block 4.

[0033] The main body 1 is also equipped with a first torsion spring 5, one of the support legs of the first torsion spring 5 extends into the locking block 4, and always pushes the first hook 31 in the separation direction;

[0034] The main body 1 is also provided with a second slide rail 12, in which a first slider 6 is slidably installed. The side wall of the first slider 6 is provided with a protrusion 61 extending out of the main body 1. A release arm 62 is also hinged to the first slider 6. The middle part of the release arm 62 is hinged to the first slider 6, and one end of the release arm 62 is provided with a locking arm 63 extending out of the main body 1. A locking area 64 is formed between the locking arm 63 and the protrusion 61. The hook block 65 located on the guide rail is clamped in the locking area 64 and moves in conjunction with the first slider 6. The other end of the locking arm 63 is provided with a guide block 66 which slides in a third slide rail 13 or a fourth slide rail 14 that are mutually connected within the main body 1.

[0035] The first slide rail 11 and the second slide rail 12 are arranged in parallel, and the third slide rail 13 is arranged at an angle to the second slide rail 12. When the guide block 66 slides in the second slide rail, it drives the locking arm 63 and the hook block 65 to form a locking area 64. When the guide block 66 is in the third slide rail, it drives the locking arm 63 to retract inward to open the locking area 64.

[0036] The inner wall of the first slider 6 is also hinged with a drive arm 67, which is connected to the second hook 32. When the guide rail is closed, the first slider 6 pushes the rebound block 3 inward and to the right, generating the power to push the rebound block 3 to deflect towards the locking block 4.

[0037] The first slider 6 is also equipped with a second torsion spring 68. One of the support legs of the second torsion spring 68 extends into the movement trajectory of the guide block 66 and the resistance arm at the tail of the drive arm 67. The second torsion spring 68 pushes the guide block 66 to move, forcing the drive locking arm 63 and the hook block 65 to form a locking area 64.

[0038] The second slide rail 12 and the third slide rail 13 are arranged in an L-shape.

[0039] The locking block 4 is installed in the main body 1 in a swing-type hinge. Its inner end is provided with a locking groove 41 to be hooked and connected to the first hook 31. Its outer end is provided with a synchronizing arm 42 to be linked with a synchronizing mechanism. The synchronizing mechanism drives the locking block 4 to swing through the synchronizing arm 42, so as to realize the locking groove 41 and the first hook 31 being hooked and separated.

[0040] The synchronization mechanism includes a synchronization groove 7 disposed in the main body 1. A synchronization slider 71 is slidably installed in the synchronization groove 7. Under the push of the synchronization spring 72, the synchronization slider 71 always moves towards the locking block 4, forcing the synchronization slider 71 to press against the side wall of the synchronization arm 42, thus restricting the swing of the synchronization arm 42.

[0041] The synchronization mechanism also includes a synchronization gear 73 rotatably installed in the main body 1. One end of the synchronization gear 73 is connected to a synchronization rod 74 and the other end of the synchronization gear 73 of the rebound device. The synchronization gear 73 meshes with the synchronization rack 75 set on the synchronization slider 71.

[0042] The synchronization mechanism also includes a synchronization hook 22 disposed on the side wall of the rebound slider 2. Correspondingly, a synchronization pull block 76 is connected to the synchronization slider 71 via an elastic arm 79. When the synchronization slider 71 rebounds, the synchronization hook 22 pulls the synchronization pull block 76 to move outward.

[0043] The main body 1 is also provided with a synchronous reset groove 77 and a synchronous trip groove 78 that are interconnected. The synchronous pull block 76 slides in the synchronous reset groove 77 or the synchronous trip groove 78, driving the synchronous pull block 76 to engage or disengage from the synchronous hook 22.

[0044] The inner end of the synchronous hook 22 is provided with an inclined reset slope 23. When the rebound slider 2 moves inward, the reset slope 23 is pressed against the synchronous pull block 76, and after the elastic arm 79 is deformed, the synchronous pull block 76 is re-hooked with the synchronous hook 22.

[0045] The outer end of the first slider 6 is provided with a reset hook 610, which is connected to the reset hook block 24 located at the bottom of the rebound slider 2, so as to push the rebound slider 2 to move inward and release the rebound.

[0046] Working principle: such as Figure 1-3 As shown, the rebound device in this case is installed on the fixed rail of the guide rail 10. Correspondingly, a hook block 65 is fixedly installed on the movable rail of the guide rail. The rebound device pushes the hook block 65 on the guide rail to move, thereby realizing the press-rebound opening of the drawer guide rail.

[0047] like Figure 4 , 5 As shown, when the rebounder is in the closed state, the rebound block 3, which is hinged to the rebound slider 2, hooks onto the locking block 4 using the first hook 31 at its inner end, so that the tension spring is always in the state of pulling the rebound slider. At the same time, the hook block 65 on the guide rail is locked within the locking area 64 formed by the locking arm 63 and the hook block 65.

[0048] like Figure 6 , 7As shown, when the user needs to open the guide rail, they press the drawer inward, and the drawer applies an inward pushing force F through the guide rail. This pushing force is transmitted to the first slider 6 through the hook block 65. The first slider 6, with a reset hook 610 at its outer end, presses against the reset hook block 24 located at the bottom of the rebound slider 2, pushing the rebound slider 2 inward. When the rebound slider 2 moves inward, it pushes the rebound hook block 3 inward. Since the first hook 31 on the rebound hook block 3 uses an elastic pressure hook on the locking block 4, and in the hooked state, the main body 1 also has a first torsion spring 5 installed inside. One of the support legs of the first torsion spring 5 extends into the locking block 4, always pushing the first hook 31 in the separation direction. Therefore, when the rebound hook block is triggered to rebound, only a slight separation between the first hook and the locking block is needed for the first torsion spring 5 to push the first hook away from the locking block. After the first hook loses its locking of the rebound hook block 3, the rebound slider rebounds outward under the action of the tension spring.

[0049] like Figure 10 As described above, when the rebound slider 2 moves outward, it is hooked to the reset hook 610 through the second hook 32, which pulls the first slider 6 outward. When the first slider 6 moves outward, the drawer is opened by pulling the hook block 65.

[0050] like Figure 11 As shown, when the rebounder opens to a certain stroke, the guide block 66 enters the third slide from the second slide, driving the locking arm 63 to retract inward and open the locking area 64. The hook block 65 on the guide rail crosses the locking arm 63, allowing the guide rail to continue to open outward.

[0051] like Figure 12 As shown, when the user wants to close the guide rail, they push the drawer inward. The drawer, through the guide rail, moves the hook block 65. After the hook block 65 contacts the protrusion 61 on the side wall of the first slider 6, the protrusion 61 drives the first slider to move inward. When it moves inward, the guide block 66 re-enters the second slide from the third slide, driving the locking arm 63 to pop outward to close the locking area 64. At the same time, one of the support feet of the second torsion spring 68 installed in the first slider 6 extends into the movement trajectory of the resistance arm at the tail of the drive arm 67, so that the inner end of the drive arm 67 swings towards the first guide platform and uses the inner end of the drive arm to press against the second hook 32 and engage with it. When the guide rail continues to close, the first slider 6 pushes the rebound hook 3 inward in the inward and rightward directions, generating the force to push the rebound hook 3 towards the locking block 4. When the first hook 31 slides to the innermost end on the side wall of the first guide platform 33 inside the main body 1, the first hook 31 hooks onto the locking block 4, which locks the rebound slider. When the first hook 31 is hooked onto the locking block 4, its main body deflects, forcing the inner end of the drive arm to press and separate from the second hook 32, and the guide rail can automatically reset under the drive of the internal reset buffer device.

[0052] Typically, the drawer slides are installed in two sets on the left and right sides, so two sets of rebound devices are also required to rebound the left and right sets of slides respectively. In order to make the two sets of rebound devices move synchronously, the locking block 4 in this case is installed in the main body 1 in a swing hinge. Its inner end is provided with a locking groove 41 to be hooked and connected to the first hook 31, and its outer end is provided with a synchronizing arm 42 to be linked with the synchronizing mechanism. The synchronizing mechanism drives the locking block 4 to swing through the synchronizing arm 42, so as to realize the locking groove 41 and the first hook 31 being hooked and separated.

[0053] It should be noted that the synchronization mechanism in this case includes a synchronization groove 7 installed within the main body 1. A synchronization slider 71 is slidably installed within the synchronization groove 7. Under the push of the synchronization spring 72, the synchronization slider 71 always moves towards the locking block 4, forcing the synchronization slider 71 to press against the side wall of the synchronization arm 42, thus restricting the swing of the synchronization arm 42. At the same time, a synchronization gear 73 is rotatably installed within the main body 1. One end of the synchronization gear 73 is connected to a synchronization rod 74, which connects to the synchronization gear 73 of the rebound device on the other side. The synchronization gear 73 meshes with a synchronization rack 75 installed on the synchronization slider 71. Correspondingly, a synchronization pull block 76 is connected to the synchronization slider 71 via an elastic arm 79. When the rebound slider of one set of rebound devices is triggered, the rebound slider pulls the synchronization pull block 76 outward through the synchronization hook 22, thereby using the synchronization pull block 76 to pull the synchronization slider. When the synchronization slider moves, it drives the synchronization slider on the other side to move through the transmission action of the synchronization rack, synchronization gear, and synchronization rod. When the synchronous slider moves, the synchronous slider 71 separates from the side wall of the synchronous arm 42, and the synchronous arm 42 loses its support and swings, causing the locking groove 41 on the inner end of the locking block to deflect and disengage from the first hook 31, thereby achieving the purpose of triggering the rebound function.

[0054] Compared to traditional technologies, this design incorporates a first torsion spring within the main body. One of the spring's support legs extends into the locking block, consistently pushing the first hook in the separation direction. Therefore, when triggering the rebound, only a slight separation between the first hook and the locking block is needed for the torsion spring to push the hook away, achieving the rebound. The short trigger stroke helps maintain the drawer's seal. Furthermore, the rebound mechanism includes a synchronization device, enabling simultaneous triggering of both left and right rebound mechanisms. This allows users to open the drawer by pressing any position on the drawer panel, enhancing user convenience.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A micro-drive drawer synchronous rebounder, characterized by: It includes the main body (1), the first slide (11) is arranged in the hollow inside the main body (1), the first slide (11) is installed with the rebound slider (2), the rebound slider (2) is arranged with the tension spring (21) between the main body (1), the tension spring (21) always pulls the rebound slider (2) to pull the rebound slider (2) in the outward direction; The rebound slider (2) is hingedly installed with the rebound hanging block (3), the rebound hanging block (3) is provided with the first hook (31) and the second hook (32), the first hook (31) is located in the first guide table (33) side wall sliding in the main body (1), the inner end of the first guide table (33) is connected with the locking block (4), when the drawer is closed, the first hook (31) is hung on the locking block (4). The main body (1) is further provided with the first torsion spring (5), one of the supporting legs of the first torsion spring (5) extends into the locking block (4), and always pushes the first hook (31) in the direction of separation. The main body (1) is further provided with the second slide (12), the first slider (6) is slidably installed in the second slide (12), the side wall of the first slider (6) is provided with the protrusion (61) extending out of the main body (1), the first slider (6) is further hingedly installed with the release arm (62), the middle part of the release arm (62) is hinged with the first slider (6), one end of the release arm (62) is provided with the locking arm (63) extending out of the main body (1), the locking arm (63) and the protrusion (61) form a locking area (64), the hanging block (65) on the guide rail is clamped in the locking area (64) and linked with the first slider (6); The other end of the locking arm (63) is provided with a guide block (66) which is slidably arranged in the third slide (13) or the fourth slide (14) which are in communication in the main body (1). The first slide (11) and the second slide (12) are arranged in parallel, the third slide (13) is inclined to the second slide (12), when the guide block (66) is located in the second slide (12), the locking arm (63) and the hanging block (65) form the locking area (64), when the guide block (66) slides in the second slide (12), the locking arm (63) is driven to retract inward to open the locking area (64). The inner side wall of the first slider (6) is further hingedly installed with the driving arm (67), the driving arm (67) is in butt joint with the second hook (32), when the guide rail is closed, the rebound hanging block (3) moves in the inward direction by the first slider (6) pushing in the inward and rightward directions, which generates the power to push the rebound hanging block (3) to deflect in the direction of the locking block (4).

2. A micro-drive drawer synchronous rebounder as defined in claim 1, wherein: The first slider (6) is further provided with the second torsion spring (68), one of the supporting legs of the second torsion spring (68) extends into the movable track of the resistance arm at the tail of the guide block (66) and the driving arm (67), the second torsion spring (68) moves by pushing the guide block (66), which forces the locking arm (63) and the hanging block (65) to form the locking area (64).

3. A micro-drive drawer synchronous rebounder as defined in claim 1, wherein: The second slide (12) and the third slide (13) are in L-shaped distribution.

4. The micro-drive drawer synchronous rebounder of claim 1, wherein: The locking block (4) is swingingly hinged in the main body (1), the inner end of which is provided with a locking slot (41) and a first hook (31) for hanging connection, and the outer end is provided with a synchronous arm (42) for linkage with a synchronous mechanism, the synchronous mechanism drives the locking block (4) to swing through the synchronous arm (42), so as to realize the hanging connection and separation of the locking slot (41) and the first hook (31).

5. A micro-drive drawer synchronous rebounder as defined in claim 4, wherein: The synchronous mechanism comprises a synchronous slot (7) provided in the main body (1), and a synchronous sliding block (71) is slidingly installed in the synchronous slot (7), the synchronous sliding block (71) is always moved towards the locking block (4) under the pushing of a synchronous spring (72), so as to force the synchronous sliding block (71) to press against the side wall of the synchronous arm (42) and limit the swing of the synchronous arm (42).

6. A micro-drive drawer synchronous rebounder as defined in claim 4, wherein: The synchronous mechanism further comprises a synchronous gear (73) which is rotatably installed in the main body (1), one end of the synchronous gear (73) is connected with a synchronous rod (74), and the other end is connected with a rebounder synchronous gear (73), the synchronous gear (73) is engaged with a synchronous rack (75) provided on the synchronous sliding block (71).

7. A micro-drive drawer synchronous rebounder as defined in claim 4, wherein: The synchronous mechanism further comprises a synchronous hook (22) provided on the side wall of the rebound sliding block (2), and a synchronous pull block (76) is connected to the synchronous sliding block (71) through an elastic arm (79) in correspondence.

8. A micro-drive drawer synchronous rebounder as defined in claim 7, wherein: The main body (1) is further provided with a synchronous reset slot (77) and a synchronous tripping slot (78) which are in communication with each other, the synchronous pull block (76) is slidingly located in the synchronous reset slot (77) or the synchronous tripping slot (78), and drives the synchronous pull block (76) to be hung or separated from the synchronous hook (22).

9. A micro-drive drawer synchronous rebounder as defined in claim 8, wherein: The inner end of the synchronous hook (22) is provided with an inclined reset slope (23), when the rebound sliding block (2) moves inward, the reset slope (23) is pressed against the synchronous pull block (76), and drives the elastic arm (79) to deform, so as to re-hang the synchronous pull block (76) and the synchronous hook (22).

10. The micro-drive drawer synchronous rebounder of claim 1, wherein: The outer end of the first sliding block (6) is provided with a reset hook (610) which is connected with a reset hook block (24) provided at the bottom of the rebound sliding block (2), and pushes the rebound sliding block (2) to move inward to release the rebound.

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