A two-stage catapult cushion bumper

Abstract

The application discloses a two-stage ejection type buffer rebounder, which comprises a fixed seat, a movable block and a slider for pushing the movable block forward, the slider and the movable block are slidably connected on the fixed seat; the buffer rebounder further comprises a pull-in spring for pulling the drawer backward to a closed position, a push-out spring for overcoming the elastic restoring force of the pull-in spring, pushing the movable block and a starting piece forward, locking the pull-in spring lock pin and unlocking the pull-in spring lock pin from the starting piece; the buffer rebounder further comprises a push-out spring for pushing the starting piece, which has been unlocked from the pull-in spring lock pin, forward and a pushed part arranged on an inner rail for being pushed forward by the push-out spring lock pin. The buffer rebounder can make the drawer move backward to the closed position automatically, realize the first-stage ejection of the drawer and realize the second-stage ejection of the drawer in a free state and move forward by inertia, thereby improving the use experience of the drawer.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rebounders, in particular to a two-section elastic rebounder. BACKGROUND

[0002] At present, there are three-section rails on the market, which are used to connect the drawer and the cabinet body, so that the drawer can be smoothly opened or closed. In order to improve the experience, some three-section rails are installed with dampers or rebounders. The damper can automatically pull the drawer to the closed position through the extension spring at the end of the closing of the drawer and buffer the collision through the hydraulic buffer. The rebounder can unlock the compression spring in the elastic compression state by pressing the drawer in the closed state, and the elastic restoring force of the compression spring is released, so that the rebounder can pop out the drawer. After the drawer is popped out, it is in a free state, which is convenient for the user to pull open the drawer. Recently, there are three-section rail products on the market that combine the functions of dampers and rebounders. However, the existing steel ball buffer rebound slide rail does not truly realize the function of both automatically closing the drawer and making the drawer in a free state after being popped out. After the user presses the drawer, the drawer is only popped out for a very short distance, and the drawer still needs to be pulled out by hand. The pulling process has a certain resistance, which is generated by the extension spring of the buffer rebounder that realizes the automatic closing of the drawer, resulting in poor drawer use experience. Since the left and right sides of the drawer are respectively installed with three-section rails to balance the force of the drawer, the triggering of the pop-out function of the buffer rebounder of the two sets of three-section rails on the left and right sides needs to be synchronized to balance the forward pushing force of the drawer left and right, otherwise the drawer will be stuck due to the placement of heavy objects inside, resulting in failure to pop out the drawer. The existing rebounding synchronization is a gear transmission structure, which has high manufacturing process requirements. The gap between the teeth consumes transmission power, affecting the success rate of synchronous pop-out of the two rebounders, resulting in high cost and poor drawer use experience. SUMMARY

[0003] The present application aims to overcome the shortcomings of the prior art and provide a two-section elastic buffer rebounder, which is beneficial to improve the use experience of the drawer.

[0004] The purpose of the present application is achieved by the following technical solutions.

[0005] The two-stage ejection type buffer rebounder disclosed by the application comprises a fixed seat, a movable block and a slider for pushing the movable block forward, the slider and the movable block are connected to the fixed seat in a sliding manner; further comprising a pull-in spring for pulling the drawer to a closed position, one end of the pull-in spring is connected to the fixed seat, the other end of the pull-in spring corresponding to the one end is connected to the movable block, the movable block is hinged with a pull-in spring lock pin for locking the pull-in spring in a stretched state, the fixed seat is formed with a buffer rail groove, the pull-in spring lock pin is arranged on the buffer rail groove in a sliding manner, the front end of the buffer rail groove is formed with a stretched buckle position for buckling the pull-in spring lock pin in a locked state; further comprising a starting piece installed on an inner rail for pushing the pull-in spring lock pin away from the stretched buckle position to unlock the pull-in spring, the starting piece can be buckled with the pull-in spring lock pin; further comprising a push-out spring for overcoming the elastic recovery force of the pull-in spring, pushing the movable block and the starting piece through the slider to make the pull-in spring lock pin locked and the pull-in spring lock pin and the starting piece unbuckled, one end of the push-out spring is connected to the fixed seat, the other end of the push-out spring corresponding to the one end is connected to the slider, the slider is connected with a push-out spring lock pin in a sliding manner for locking the push-out spring in an elastic compression state, the fixed seat is formed with a rebound rail groove, the push-out spring lock pin is arranged on the rebound rail groove in a sliding manner, the rear end of the rebound rail groove is formed with a rebound buckle position for buckling the push-out spring lock pin in a locked state; further comprising a push block installed on an inner rail for pushing the push-out spring lock pin backward to make the push-out spring lock pin slide into the rebound buckle position, the push block can be connected with the push-out spring lock pin in a contact manner; further comprising an unlocking pushing part arranged on an inner rail for moving backward to drive the push-out spring lock pin to slide out of the rebound buckle position; further comprising a push-out spring for pushing the starting piece which has been unbuckled with the pull-in spring lock pin forward and a pushed part arranged on an inner rail for being pushed by the push-out spring lock pin, one end of the push-out spring is connected to the push-out spring lock pin, the other end of the push-out spring corresponding to the one end is connected to the slider, the push-out spring lock pin can be connected with the pushed part in a contact manner.

[0006] Preferably, the buffer rebounder of the application further comprises a buffer for buffering the closing of the drawer, a cylinder body of the buffer is installed in the fixed seat, a piston rod of the buffer is connected to the movable block.

[0007] Preferably, the fixed seat is connected with a rebound unlocking block in a sliding manner, the unlocking pushing part can be connected with the rebound unlocking block in a contact manner, the push-out spring lock pin is formed with a clamping column for contacting the pushed part and the push block, the rebound unlocking block is formed with an unlocking slope for pushing the clamping column away from the rebound buckle position.

[0008] Preferably, the buffer rebounder of the present application further comprises a sliding piece, which is connected to the sliding block in front and back, one end of the ejecting spring lock pin is hinged to the sliding piece, and the clamping column is formed on the other end corresponding to the ejecting spring lock pin.

[0009] Preferably, the buffer rebounder of the present application further comprises a reset spring for driving the rebound unlocking block to move forward and reset.

[0010] Preferably, the buffer rebounder of the present application further comprises a driving swing arm, the rebound unlocking block is connected to one end of the driving swing arm, the rebound unlocking block can drive the driving swing arm to swing, the reset spring is connected to the driving swing arm, and the reset spring can drive the driving swing arm to reset; and a synchronous rebound transmission shaft assembly for transmission connection with the swing center of the driving swing arm arranged on the left and right sides of the drawer respectively, and the left and right ends of the synchronous rebound transmission shaft assembly are connected to the corresponding driving swing arms respectively.

[0011] Preferably, the synchronous rebound transmission shaft assembly comprises a first transmission shaft, a second transmission shaft and a connector, the swing center of the driving swing arm is provided with a driving interface, one end of the first transmission shaft and one end of the second transmission shaft are connected to the corresponding driving interfaces respectively, the other end of the first transmission shaft and the other end of the second transmission shaft are transmission connected through the connector, and the second transmission shaft is slidingly connected to the connector.

[0012] Preferably, the connector is provided with a sleeve, a movable plug, an extension spring and a fixed plug, the fixed plug is embedded in one end of the sleeve, the movable plug is slidingly arranged in the other end of the sleeve corresponding to the fixed plug, the extension spring is arranged in the sleeve, one end of the extension spring is connected to the movable plug, the other end of the extension spring is connected to the fixed plug, the first transmission shaft is inserted into the fixed plug, and the second transmission shaft is inserted into the movable plug.

[0013] Preferably, the first transmission shaft and the second transmission shaft are hexagonal shafts.

[0014] Preferably, the synchronous rebound transmission shaft assembly is provided with a joint, the joint is formed with a sleeve part and a plug column part, the sleeve part and the plug column part are coaxially arranged, the plug column part is inserted into the corresponding driving interface, and one end of the first transmission shaft and one end of the second transmission shaft are inserted into the corresponding sleeve part respectively.

[0015] The present application has the beneficial effects that: by setting the pull-in spring for pulling the drawer back to the closed position, the drawer can be moved back to the closed position by the pulling force of the pull-in spring; by setting the push-out spring for overcoming the elastic restoring force of the pull-in spring to push the slider, the movable block and the starting piece to make the pull-in spring lock pin locked and the pull-in spring lock pin and the starting piece unlocked, the drawer can overcome the elastic restoring force of the pull-in spring to realize the first stage of the drawer pop-out; by setting the push-out spring for pulling the starting piece unlocked from the pull-in spring lock pin forward and the push part arranged on the inner rail for being pushed by the push-out spring lock pin, one end of the push-out spring is connected with the push-out spring lock pin, the other end of the push-out spring corresponding to the one end is connected with the slider, and the push-out spring lock pin can be connected with the push part, so that the drawer in the free state can realize the second stage of the drawer pop-out and move forward by inertia; thereby, the use experience of the drawer is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a front perspective structure schematic view of the buffer rebounder of the present application.

[0017] Figure 2 It is a back perspective structure schematic view of the buffer rebounder of the present application with the fixing seat removed.

[0018] Figure 3 It is a front exploded schematic view of the buffer rebounder of the present application.

[0019] Figure 4 It is a back exploded schematic view of the buffer rebounder of the present application.

[0020] Figure 5 It is a state schematic view of the push block of the present application just contacting the clamping column in the process of closing the drawer.

[0021] Figure 6 It is a state schematic view of the push block of the present application pushing the clamping column into the rebound lock position in the process of closing the drawer.

[0022] Figure 7 It is a back schematic view of the buffer rebounder of the present application corresponding to Figure 6 .

[0023] Figure 8 It is a state schematic view of the unlocking push part of the present application contacting the rebound unlocking block when opening the drawer.

[0024] Figure 9 It is a back schematic view of the buffer rebounder of the present application corresponding to Figure 8 .

[0025] Figure 10The schematic diagram of the back of the buffer rebounder of the present application.

[0026] Figure 11 The schematic diagram of the back of the buffer rebounder of the present application. Figure 10 The schematic diagram of the back of the buffer rebounder of the present application.

[0027] Figure 12 The schematic diagram of the back of the buffer rebounder of the present application.

[0028] Figure 13 The schematic diagram of the back of the buffer rebounder of the present application.

[0029] Figure 14 The schematic diagram of the back of the buffer rebounder of the present application.

[0030] Figure 15 The schematic diagram of the back of the buffer rebounder of the present application.

[0031] Figure 16 The schematic diagram of the back of the buffer rebounder of the present application.

[0032] Figure 17 The schematic diagram of the back of the buffer rebounder of the present application.

[0033] Figure 18 The schematic diagram of the back of the buffer rebounder of the present application.

[0034] Figure 19 The schematic diagram of the back of the buffer rebounder of the present application.

[0035] Figure 20 The schematic diagram of the back of the buffer rebounder of the present application.

[0036] Figure 21 The schematic diagram of the back of the buffer rebounder of the present application.

[0037] Label Explanation: 1-Fixed base; 101-Buffer rail groove; 1011-Tension buckle; 102-Rebound rail groove; 1021-Rebound buckle; 103-Protruding shaft; 104-First plate body; 105-Second plate body; 2-Slider; 201-Slide groove; 2011-Avoidance locking position; 203-Ratch pin; 3-Moving block; 4-Rebound unlocking block; 401-Unlocking ramp; 402-Unlocking push plate; 403-Swing connecting hole; 5-Pull-in spring lock pin; 501-Bump post; 502-Lock post; 6-Extend spring lock pin; 601-Locking post; 61-Slider; 7-Drive swing arm; 701-Pulley pin; 702-Swing center hole; 703-Drive interface; 8-Extend spring; 9-Pull-out spring; 10-Pull-in spring; 11-Buffer; 12-Push block; 13-Starting plate; 14-Synchronous rebound drive shaft assembly; 141-First drive shaft; 142-Second drive shaft; 143-Connector; 1431-Housing; 1432-Moving plug; 1433-Telescopic spring; 1434-Fixed plug; 144-Connector; 1441-Sleeve part; 1442-Pin post part; 15-Reset spring; 99-Inner rail; 9901-Pushed part; 9902-Unlocking push part; 98-Outer rail; 900-Drawer. Detailed Implementation

[0038] The present invention will now be further described with reference to the accompanying drawings.

[0039] The two-stage ejection-type buffer rebound device of the present invention, such as Figures 1 to 4 As shown, the device includes a fixed base 1, a movable block 3, and a slider 2 for pushing the movable block 3 forward. The slider 2 and the movable block 3 are slidably connected to the fixed base 1. Specifically, a guide groove is formed on the back of the slider 2, such as... Figure 12 As shown, the fixed base 1 has a first plate portion 104, the upper and lower ends of which are adapted to and connected to the guide groove of the slider 2. The fixed base 1 also has a second plate portion 105, which is located in front of the first plate portion 104. The back of the movable block 3 is slidably fitted onto the second plate portion 105. Figures 1 to 4 As shown, the buffer rebound device of the present invention also includes a pull-in spring 10 for pulling the drawer 900 backward to the closed position. The pull-in spring 10 is a tension spring, one end of which is connected to the fixed base 1, and the other end of which is connected to the movable block 3. Specifically, each end of the pull-in spring 10 has a neck, and the necks at both ends of the pull-in spring 10 are respectively engaged with the movable block 3 and the fixed base 1. The movable block 3 is hinged with a pull-in spring locking pin 5 for locking the pull-in spring 10 in the tensioned state, such as... Figure 12As shown, the fixed seat 1 is formed with a buffer rail groove 101, the pull-in spring lock pin 5 is arranged to slide on the buffer rail groove 101, specifically, the back of the pull-in spring lock pin 5 is formed with a buckle column 502, the buckle column 502 is adapted to slide in the buffer rail groove 101, as shown Figure 12 As shown, the front end of the buffer rail groove 101 is formed with a stretching buckle position 1011 for buckling with the pull-in spring lock pin 5 in the locked state, specifically, when the buckle column 502 slides into the stretching buckle position 1011, the stretching buckle position 1011 blocks the buckle column 502, so that the pull-in spring 10 is kept in the stretched state; the buffer rebounder further comprises a starting piece 13 installed on the inner rail 99 for pushing the pull-in spring lock pin 5 away from the stretching buckle position 1011 to unlock the pull-in spring 10, as shown Figure 4 and Figure 5 As shown, the starting piece 13 is installed in the slot-shaped structure of the inner rail 99, the inner rail 99 is a three-section rail component, the structure of the starting piece 13 belongs to the prior art, the starting piece 13 is formed with a rear-opening bayonet, as shown Figure 14 As shown, the front side of the pull-in spring lock pin 5 is formed with a collision column 501, the starting piece 13 can buckle with the pull-in spring lock pin 5, specifically, the bayonet of the starting piece 13 can buckle with the collision column 501 of the pull-in spring lock pin 5, and the collision column 501 can be separated from the bayonet of the starting piece 13 through the guiding effect of the buffer rail groove 101; the buffer rebounder further comprises a push-out spring 8 for overcoming the elastic restoring force of the pull-in spring 10 to push the movable block 3 and the starting piece 13 through the sliding block 2, so that the pull-in spring lock pin 5 is locked and the pull-in spring lock pin 5 is buckled with the starting piece 13, one end of the push-out spring 8 is connected with the fixed seat 1, the other end corresponding to the push-out spring 8 is connected with the sliding block 2, specifically, the push-out spring 8 is a compression spring, the upper and lower parts of the sliding block 2 are each formed with a sleeve part, the push-out spring 8 is arranged in the corresponding sleeve part, the fixed seat 1 is provided with a guide rod, the guide rod is adapted to slide in the corresponding sleeve part, the rear end of the push-out spring 8 abuts against the guide rod, as shown Figure 4 As shown, the sleeve part is slidably provided with a striker 203, the striker 203 is provided with a flange part, the front part of the striker 203 protrudes out of the sliding block 2, the flange part of the striker 203 is arranged in the sleeve part, the front end of the push-out spring 8 abuts against the rear end surface of the flange part of the striker 203, so that when the striker 203 collides with the movable block 3, the striker 203 can move backward relative to the sliding block 2 to achieve a buffering effect, so it can be understood that the sliding block 2 can indirectly push the movable block 3 forward through the striker 203. The sliding block 2 is slidably connected with a push-out spring lock pin 6 for locking the push-out spring 8 in an elastic compression state, specifically, the push-out spring lock pin 6 can slide forward and backward on the sliding block 2, but the push-out spring lock pin 6 is limited by the sliding block 2, so that the forward thrust of the push-out spring 8 can be transmitted to the push-out spring lock pin 6 through the sliding block 2, as shownFigure 12 As shown in the figure, the fixed seat 1 is formed with a rebound track groove 102, and the eject spring lock catch 6 is arranged to slide on the rebound track groove 102, in particular, as shown in the figure, Figure 15 As shown in the figure, the eject spring lock catch 6 is formed with a clamping column 601, which can slide in the rebound track groove 102, and the rear end of the rebound track groove 102 is formed with a rebound catch position 1021 for buckling with the eject spring lock catch 6 in the locked state, that is, when the clamping column 601 slides into the rebound catch position 1021 through the guidance of the rebound track groove 102, the forward elastic recovery force of the eject spring 8 is supported by the rebound catch position 1021 due to the blocking effect of the rebound catch position 1021 on the clamping column 601, so that the eject spring 8 can be kept in the elastic compression deformation state. As shown in the figure, Figures 1 to 4 As shown in the figure, the buffer rebounder of the present application further comprises a push block 12 mounted on the inner rail 99 for pushing the eject spring lock catch 6 backward to make the eject spring lock catch 6 slide into the rebound catch position 1021, the push block 12 is arranged at a position close to the rear end of the inner rail 99, and the starting piece 13 is arranged in front of the push block 12, through the rear movement of the inner rail 99, the push block 12 can be connected with the eject spring lock catch 6; the buffer rebounder of the present application further comprises an unlocking push part 9902 arranged on the inner rail 99 for sliding out the eject spring lock catch 6 from the rebound catch position 1021 by moving backward, more specifically, in order to simplify the structure, the unlocking push part 9902 can be the rear end part of the inner rail 99. The buffer rebounder of the present application further comprises a pull-out spring 9 for pushing the starting piece 13, which has been buckled with the pull-in spring lock catch 5, forward, and a pushed part 9901 arranged on the inner rail 99 for being pushed by the eject spring lock catch 6, as shown in the figure, Figure 4 As shown in the figure, for example, the pushed part 9901 can be a plate formed by stamping and bending on the inner rail 99, the pushed part 9901 is arranged between the push block 12 and the starting piece 13, one end of the pull-out spring 9 is connected with the eject spring lock catch 6, as shown in the figure, Figure 2 As shown in the figure, in particular, the rear end of the pull-out spring 9 is formed with a hook part for hooking with the clamping column 601 of the eject spring lock catch 6, and the other end of the pull-out spring 9 is connected with the sliding block 2, in particular, the front end of the pull-out spring 9 is clamped with the front part of the sliding block 2, and the eject spring lock catch 6 can be connected with the pushed part 9901.

[0040] The working principle of the buffer rebounder of the present application is briefly described as follows: the drawer is pushed backward by hand, the inner rail 99 moves backward, as shown in the figure, Figure 5As shown, when the push block 12 installed at the rear end of the inner rail 98 collides with the front end of the clamping column 601 of the push spring lock pin 6, the push block 12 drives the push spring lock pin 6 to move backward, and since the sliding block 2 is provided with a limiting structure for blocking the push block 12, the push spring lock pin 6 can drive the sliding block 2 to move backward, and since the front end of the push spring 8 indirectly abuts against the sliding block 2 through the impact pin 203, the push spring 8 is elastically compressed and deformed, during which the user needs to overcome the elastic restoring force of the push spring 8, the back end of the clamping column 601 of the push spring lock pin 6 slides in the rebound rail groove 102, and as the sliding block 2 moves backward to the bottom, the push block 12 pushes the clamping column 601 to continue to move backward, so that the clamping column 601 moves relatively backward in the sliding groove 201 of the sliding block 2, which makes the pull spring 9 elastically stretched and deformed, as shown in Figure 6 As shown, when the back end of the clamping column 601 slides into the rebound buckle position 1021 along the rebound rail groove 102, the front end of the clamping column 601 also simultaneously deviates downward, so that the clamping column 601 is separated from the push block 12, as shown in Figure 13 As shown, the sliding block 2 is formed with a sliding groove 201, and the rear end of the sliding groove 201 is formed with an avoiding clamping position 2011, when the front end of the clamping column 601 deviates into the rebound buckle position 1021, the clamping column 601 simultaneously deviates into the avoiding clamping position 2011, as described above, when the back end of the clamping column 601 is located in the rebound buckle position 1021, the push spring 8 is locked, and the push spring 8 remains in an elastically compressed state, and the inner rail 99 remains to move backward, as shown in Figure 6As shown, at this time, the stop pin 501 of the pull-in spring lock pin 5 has entered the latch of the starter piece 13. Through the guiding action of the latch of the starter piece 13, the starter piece 13 pushes the stop pin 502 down to move away from the tension latch 1011, so the pull-in spring 10 is unlocked. The elastic restoring force of the pull-in spring 10 pulls the movable block 3 to move backward. Since the pull-in spring lock pin 5 is hinged to the movable block 3, the pull-in spring lock pin 5 moves backward. Since the starter piece 13 is engaged with the stop pin 501, the pull-in spring 10 drives the inner rail 99 and the drawer 900 to move backward to the closed position, completing the closing of the drawer 900. As can be seen from the above, the latter part of the closing stroke of the drawer 900 (after the spring 8 is locked) is completed by the pulling force of the pull-in spring 10, without the need for manual pushing of the drawer 900 to the closed position. When drawer 900 needs to be opened, press it backward by hand. Since the actuating piece 13 is still engaged with the pull-in spring lock pin 5, the movable block 3 also moves backward. The movable block 3 pushes the striker 203 backward a short distance, causing the push-out spring 8 to undergo a further small elastic compression deformation. When the unlocking push part 9902 moves backward, it causes the locking pin 601 of the push-out spring lock pin 6 to disengage from the rebound latch 1021. Then, the drawer 900 is released by hand. Since the push-out spring 8 has been unlocked, the elastic restoring force of the push-out spring 8 pushes the slider 2 forward. The slider 2 pushes the movable block 3 forward through the striker 203. Since the actuating piece 13 is still engaged with the pull-in spring lock pin 5, the push-out spring 8 can drive the inner rail 99 and drawer 900 to move forward together, realizing the first stage of the drawer 900's forward ejection. During this process, the pushing force of the push-out spring 8 overcomes the elastic restoring force of the pull-in spring 10, causing the pull-in spring 10 to elastically stretch and deform until the locking post 502 of the pull-in spring lock pin 5 is guided by the buffer rail groove 101 into the extension locking position 1011. As mentioned above, when the locking post 502 engages with the extension locking position 1011, the pull-in spring 10 is locked, keeping the pull-in spring 10 in a state of elastic stretching. Figure 10 As shown, when the latch 502 enters the tension latch position 1011, the contact pin 501 of the spring lock pin 5 is pulled in and disengaged from the starting plate 13. Since the movable block 3 has already moved to the foremost position, the slider 2 will be stopped by the obstruction of the movable block 3. However, when the contact pin 501 is disengaged from the starting plate 13, the inner rail 99 and drawer 900 become free. The obstruction of the push part 9901 acting on the push spring lock pin 6 due to the pulling force of the pull spring 10 disappears. Therefore, the elastic restoring force of the pull spring 9 pulls the push spring lock pin 6 forward, as shown. Figure 11 As shown (note that for easier viewing), Figure 8 and Figure 11 The inner rail was drawn to be 99, and Figure 5 , Figure 6 , Figure 7 andFigure 10 (Neither the inner rail 99 is shown) Since the pushed part 9901 is against the front end of the latch 601 of the spring-loaded locking pin 6, the latch 601 pushes the inner rail 99 forward, causing the drawer 900 to eject a second time. When the spring 9 is pulled out and returns to its elastic state, the drawer 900 continues to move forward due to inertia until frictional resistance stops the drawer 900. At this point, the drawer 900 will not be subject to resistance when the user pulls it open (except for the frictional resistance of the three-section rail itself), thus making it convenient for the user to operate and improving the user experience of the drawer 900.

[0041] Furthermore, such as Figures 1 to 4 As shown, the fixed base 1 is slidably connected to a rebound unlocking block 4, and the unlocking push part 9902 can contact and connect with the rebound unlocking block 4, as shown. Figure 16 As shown, specifically, an unlocking push plate 402 is formed on the front side of the rebound unlocking block 4. The unlocking push part 9902 can collide with the unlocking push plate 402, causing the rebound unlocking block 4 to move backward, as shown. Figure 12 As shown, the spring-loaded locking pin 6 has a locking post 601 for contacting the pushed part 9901 and the push block 12. As described above, specifically, the front end of the locking post 601 can contact the pushed part 9901 and the push block 12, while the back end of the locking post 601 slides within the rebound groove 102. Figure 16 As shown, the rebound unlocking block 4 has an unlocking ramp 401 for pushing the latch 601 away from the rebound latch 1021. Therefore, when it is necessary to open the drawer 900, pressing the drawer 900 backward by hand causes the inner rail 99 to move backward. The unlocking push part 9902 of the inner rail 99 then contacts the unlocking push plate 402, and the rebound unlocking block 4 moves backward from... Figures 7 to 9 The transformation is evident: the unlocking ramp 401 lifts the latch 601, disengaging it from the rebound latch 1021. Alternatively, the latch 601 can be understood as moving upwards along the unlocking ramp 401, thus unlocking the ejector spring 8. By setting the structure of the rebound unlocking block 4, the structure simply transforms the pressing unlocking action of the drawer 900 into lifting the latch 601 away from the rebound latch 1021. Existing rebound unlocking functions use a circuitous guide structure (complex branched channels) to guide the hook to disengage and unlock the rebound spring, which easily leads to unlocking failure. Furthermore, the existing structure can cause a rebound when the drawer is fully closed, impacting the parts. In contrast, this invention uses the unlocking ramp 401 of the rebound unlocking block 4 to directly lift the latch 601 and unlock the ejector spring 8. This allows the rebound track 102 to be a single guide channel, greatly reducing the possibility of the ejector spring 8 failing to unlock, preventing drawer 900 from malfunctioning when opening, and avoiding rebound when the drawer 900 is fully closed, thus preventing impact on the parts.

[0042] Furthermore, such as Figure 3 andFigure 4 As shown, the slide 61 is connected to the slider 2 in front and back sliding mode, and the slide 61 is connected to the slider 2 in front and back sliding mode. Figure 15 As shown, one end of the ejecting spring lock pin 6 is hinged to the slide 61, and the clamping column 601 is formed on the other end of the ejecting spring lock pin 6 corresponding to the slide 61. Specifically, the back of the slider 2 is formed with a sliding cavity, and the slide 61 is slidingly arranged in the sliding cavity of the back of the slider 2. The rear end wall of the sliding cavity has a blocking and limiting effect on the rear end surface of the slide 61. When the ejecting spring 8 is locked in the elastic compression state, the ejecting spring 8 exerts a forward thrust on the slider 2, and the slider 2 pushes the slide 61 forward through the rear end wall of the sliding cavity. Since one end of the ejecting spring lock pin 6 is hinged to the slide 61, the clamping column 601 can be pushed forward to abut against the rebound locking position 1021, so that the ejecting spring 8 is locked. The structure of the slide 61 makes the ejecting spring lock pin 6 move flexibly forward and backward.

[0043] Further, as shown in Figure 2 and Figure 3 The buffer rebounder of the present application further comprises a buffer 11 for buffering the closing of the drawer 900. The cylinder body of the buffer 11 is mounted in the fixed seat 1, and the piston rod of the buffer 11 is connected to the movable block 3. Specifically, the front end of the piston rod of the buffer 11 is clamped to the movable block 3, so that the movable block 3 can drive the piston rod of the buffer 11 to move forward and backward. During the process of the pulling-in spring 10 pulling the drawer 900 backward to the closed position, the buffer 11 forms a buffering effect, avoiding strong impact and noise when the drawer 900 is pulled to the closed position by the pulling-in spring 10.

[0044] Further, as shown in Figure 2 The buffer rebounder of the present application further comprises a reset spring 15 for driving the forward movement and resetting of the rebound unlocking block 4. For example, the reset spring 15 can directly abut against the rear end of the rebound unlocking block 4. When the rebound unlocking block 4 moves backward, the reset spring 15 is elastically compressed and deformed. When the external force pressing the drawer 900 backward is removed, the elastic restoring force of the reset spring 15 pushes the rebound unlocking block 4 forward, so that the rebound unlocking block 4 is reset. By arranging the reset spring 15, the rebound unlocking block 4 can be quickly reset.

[0045] Further, as shown in Figure 2 and Figure 3 The buffer rebounder of the present application further comprises a driving swing arm 7 arranged in the mounting cavity of the rear end of the fixed seat 1, and the mounting cavity is also provided with a cover. The rebound unlocking block 4 is connected to one end of the driving swing arm 7. Specifically, as shown in Figure 17 one end of the driving swing arm 7 is formed with a push pin 701, and Figure 2As shown, the dial pin 701 is inserted into the swing connection hole 403 at the rear end of the rebound unlocking block 4, so that the driving swing arm 7 is hinged with the rebound unlocking block 4, but the dial pin 701 and the swing connection hole 403 can be relatively displaced in the up-down direction, and the rebound unlocking block 4 can drive the driving swing arm 7 to swing, as shown in Figure 17 As shown, the middle part of the driving swing arm 7 is formed with a swing center hole 702, as shown in Figure 12 As shown, the rear end of the fixed seat 1 is formed with a convex shaft 103, the convex shaft 103 is adaptively connected with the swing center hole 702, the reset spring 15 is connected with the driving swing arm 7, specifically, the reset spring 15 and the rebound unlocking block 4 are respectively connected with the two ends of the driving swing arm 7, and the reset spring 15 can drive the driving swing arm 7 to reset, as shown in Figure 2 As shown, when the rebound unlocking block 4 moves backward, the driving swing arm 7 swings counterclockwise, the driving swing arm 7 compresses the reset spring 15, when the external force of pressing the drawer 900 backward is removed, the elastic restoring force of the reset spring 15 makes the driving swing arm 7 clockwise swing to reset, and the driving swing arm 7 drives the rebound unlocking block 4 to reset at the same time. As shown in Figure 18 and Figure 19 As shown, the buffer rebounder of the present application further comprises a synchronous rebound transmission shaft assembly 14 for transmission connection with the swing center of the driving swing arm 7 respectively arranged on the left and right sides of the drawer 900, specifically, the synchronous rebound transmission shaft assembly 14 synchronously transmits the rotary motion of the swing center of the driving swing arm 7 on one side to the swing center of the driving swing arm 7 on the other side, so that the driving swing arms 7 on the left and right sides can synchronously swing, and the left and right ends of the synchronous rebound transmission shaft assembly 14 are respectively connected with the corresponding driving swing arm 7. Since in order to make the drawer 900 balancedly slide in the cabinet, a set of three-section rails provided with the buffer rebounder of the present application need to be installed on the left and right sides of the drawer 900, specifically, the synchronous rebound transmission shaft assembly 14 can be arranged at the rear part of the drawer 900 to avoid the collision between the drawer 900 and the synchronous rebound transmission shaft assembly 14, due to the installation position error of the three-section rail, the unlocking pushing part 9902 of the inner rail 99 on one side may first collide with the corresponding rebound unlocking block 4, so that the corresponding driving swing arm 7 swings, since the driving swing arms 7 of the buffer rebounders on the left and right sides of the drawer 900 are transmission connected through the rebound transmission shaft assembly 14, so that the driving swing arm 7 on the other side also synchronously swings, since the rebound unlocking block 4 is connected with one end of the driving swing arm 7, so that the ejection springs 8 on the left and right sides of the drawer 900 can be synchronously unlocked, so that the left and right sides of the drawer 900 can simultaneously obtain forward thrust, so that the drawer 900 can keep balanced in the ejection process, which is beneficial to the flexible ejection of the drawer 900; especially when the user presses the position of the drawer 900 to the left or to the right, the synchronous transmission effect of the synchronous rebound transmission shaft assembly 14 makes the drawer 900 can be flexibly and stably ejected.

[0046] Further, as shown inFigure 20 and Figure 21 As shown in Figure 17 As shown in Figure 18 As shown in

[0047] Further, as shown in Figure 20 and Figure 21 As shown in Figure 19 As shown in

[0048] Further, as shown in Figure 20 The first transmission shaft 141 and the second transmission shaft 142 are both hexagonal shafts, which can be solid or hollow, and the cross section of the hexagonal shaft is a regular hexagon, so that the movable plug 1432 and the fixed plug 1434 are correspondingly formed with an internal hexagonal blind hole, so that the transmission connection structure is simple and reliable.

[0049] Further, as shown in Figure 20 and Figure 21 The joint 144 is provided with a sleeve portion 1441 and a plug portion 1442, the sleeve portion 1441 and the plug portion 1442 are coaxially arranged, the plug portion 1442 is respectively inserted into the corresponding drive interface 703, and one end of the first transmission shaft 141 and one end of the second transmission shaft 142 are respectively inserted into the corresponding sleeve portion 1441. The sleeve portion 1441 can be provided with an internal hexagonal blind hole for adaptive connection with the first transmission shaft 141 or the second transmission shaft 142, and the plug portion 1442 can also be provided as an external hexagonal column, so that the drive interface 703 can be provided as an internal hexagonal interface. By setting the structure of the joint 144, the joint 144 can be mass-produced, and the first transmission shaft 141 and the second transmission shaft 142 can be made of profiled material and cut to the appropriate length according to different width size specifications of the drawer 900; when packaging and transportation are required, the first transmission shaft 141 or the second transmission shaft 142 can be pulled away from the connector 143 to facilitate packaging and transportation; during installation of the synchronous rebound transmission shaft assembly 14, the second transmission shaft 142 is first moved in the direction of sliding into the connector 143, so that the total length of the synchronous rebound transmission shaft assembly 14 is shortened, then the joint 144 is aligned with the corresponding drive interface 703, then the second transmission shaft 142 is released, the joint 144 is inserted into the corresponding drive interface 703 by the elastic restoring force of the extension spring 1433, and the joint 144 is kept in transmission connection with the corresponding drive interface 703 by the elastic restoring force of the extension spring 1433.

[0050] In summary, the buffer rebounder has the advantages of simple structure, tight connection, excellent synchronization performance and high sensitivity.

Claims

1. A two-stage catapult-type buffer rebound device, characterized in that: It includes a fixed base (1), a movable block (3) and a slider (2) for pushing the movable block (3) forward, wherein the slider (2) and the movable block (3) are slidably connected to the fixed base (1) in the front and back; It also includes a pull-in spring (10) for pulling the drawer (900) backward to the closed position. One end of the pull-in spring (10) is connected to the fixed base (1), and the other end of the pull-in spring (10) is connected to the movable block (3). The movable block (3) is hinged with a pull-in spring locking pin (5) for locking the pull-in spring (10) in the stretched state. The fixed base (1) has a buffer rail groove (101), and the pull-in spring locking pin (5) The buffer rail (101) is slidably disposed on the buffer rail groove (101), the front end of which is formed with a tension latch (1011) for engaging with the pull-in spring lock pin (5) in the locked state; it also includes an actuating piece (13) mounted on the inner rail (99) for pushing the pull-in spring lock pin (5) away from the tension latch (1011) to unlock the pull-in spring (10), the actuating piece (13) being able to engage with the pull-in spring lock pin (5); It also includes an ejector spring (8) for overcoming the elastic restoring force of the pull-in spring (10) by pushing the movable block (3) and the starting piece (13) forward through the slider (2) to lock the pull-in spring locking pin (5) and to disengage the pull-in spring locking pin (5) from the starting piece (13). One end of the ejector spring (8) is connected to the fixed base (1), and the other end of the ejector spring (8) is connected to the slider (2). The slider (2) is slidably connected to an ejector spring locking pin (6) for locking the ejector spring (8) in an elastically compressed state. The fixed base (1) is formed with a rebound groove (102). The ejector spring locking pin (6) The device is slidably mounted on the rebound groove (102), and the rear end of the rebound groove (102) is formed with a rebound latch (1021) for engaging with the release spring lock pin (6) in the locked state; it also includes a push block (12) mounted on the inner rail (99) for pushing the release spring lock pin (6) backward so that the release spring lock pin (6) slides into the rebound latch (1021), and the push block (12) can contact and connect with the release spring lock pin (6); it also includes an unlocking push part (9902) mounted on the inner rail (99) for moving backward to drive the release spring lock pin (6) to slide out of the rebound latch (1021). It also includes a pull-out spring (9) for ejecting the starting piece (13) which has been disengaged from the pull-in spring lock pin (5) forward, and a push-receiving part (9901) provided on the inner rail (99) for being pushed forward by the push-out spring lock pin (6). One end of the pull-out spring (9) is connected to the push-out spring lock pin (6), and the other end of the pull-out spring (9) is connected to the slider (2). The push-out spring lock pin (6) can contact and connect with the push-receiving part (9901).

2. The two-stage catapult-type buffer rebound device according to claim 1, characterized in that: It also includes a buffer (11) for closing the buffer drawer (900), the cylinder of the buffer (11) being mounted in the fixed seat (1), and the piston rod of the buffer (11) being connected to the movable block (3).

3. The two-stage catapult-type buffer rebound device according to claim 1, characterized in that: The fixed base (1) is slidably connected to a rebound unlocking block (4), the unlocking push part (9902) can contact and connect with the rebound unlocking block (4), the push spring lock pin (6) is formed with a locking post (601) for contacting the pushed part (9901) and the push block (12), and the rebound unlocking block (4) is formed with an unlocking ramp (401) for pushing the locking post (601) away from the rebound buckle (1021).

4. The two-stage catapult-type buffer rebound device according to claim 3, characterized in that: It also includes a slider (61), which is slidably connected to the slider (2) in the front and back. One end of the push-out spring locking pin (6) is hinged to the slider (61), and the locking pin (601) is formed on the other end corresponding to the push-out spring locking pin (6).

5. The two-stage catapult-type buffer rebound device according to claim 3, characterized in that: It also includes a reset spring (15) for driving the rebound unlocking block (4) to move forward and reset.

6. The two-stage catapult-type buffer rebound device according to claim 5, characterized in that: It also includes a drive swing arm (7), the rebound unlocking block (4) is connected to one end of the drive swing arm (7), the rebound unlocking block (4) can drive the drive swing arm (7) to swing, the reset spring (15) is connected to the drive swing arm (7), the reset spring (15) can drive the drive swing arm (7) to reset; it also includes a synchronous rebound transmission shaft assembly (14) for transmission connection between the swing centers of the drive swing arms (7) respectively located on the left and right sides of the drawer (900), the left and right ends of the synchronous rebound transmission shaft assembly (14) are respectively connected to the corresponding drive swing arms (7).

7. The two-stage catapult-type buffer rebound device according to claim 6, characterized in that: The synchronous rebound drive shaft assembly (14) includes a first drive shaft (141), a second drive shaft (142), and a connector (143). The swing center of the drive arm (7) is provided with a drive interface (703). One end of the first drive shaft (141) and one end of the second drive shaft (142) are respectively connected to the corresponding drive interface (703). The other end of the first drive shaft (141) and the other end of the second drive shaft (142) are connected by the connector (143). The second drive shaft (142) is slidably connected to the connector (143).

8. The two-stage catapult-type buffer rebound device according to claim 7, characterized in that: The connector (143) is provided with a housing (1431), a movable plug (1432), a telescopic spring (1433), and a fixed plug (1434). The fixed plug (1434) is embedded in one end of the housing (1431). The movable plug (1432) is slidably disposed in the corresponding other end of the housing (1431). The telescopic spring (1433) is disposed in the housing (1431). One end of the telescopic spring (1433) is connected to the movable plug (1432), and the corresponding other end of the telescopic spring (1433) is connected to the fixed plug (1434). The first drive shaft (141) is inserted into the fixed plug (1434), and the second drive shaft (142) is inserted into the movable plug (1432).

9. The two-stage catapult-type buffer rebound device according to claim 8, characterized in that: Both the first drive shaft (141) and the second drive shaft (142) are hexagonal shafts.

10. The two-stage catapult-type buffer rebound device according to claim 7, characterized in that: The synchronous rebound drive shaft assembly (14) is provided with a connector (144), which has a sleeve portion (1441) and a plug portion (1442). The sleeve portion (1441) and the plug portion (1442) are coaxially arranged. The plug portion (1442) is inserted into the corresponding drive interface (703). One end of the first drive shaft (141) and one end of the second drive shaft (142) are inserted into the corresponding sleeve portion (1441).

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