A rotary lock linkage device suitable for multi-drawer applications

Abstract

This invention discloses a rotary lock linkage device suitable for multi-drawer applications. The locking device includes a locking component and a guide plate. The locking component includes a fixed base, a rotary lock component pivotally connected to the fixed base, and two opposing movable components slidably placed on the fixed base. The guide plate has a guide groove for the pre-formed eccentric portion of the rotary lock component to slide into or out relative to each other, so as to guide the rotary lock component to switch between a predetermined locking position A and an unlocking position B by sliding the eccentric portion. When the rotary lock component switches to the locking position A, the pre-formed top support portion of the rotary lock component pushes the two movable components of the same locking component to slide open. The two ends of the interlocking rod are respectively pushed and linked with one movable component in each of the two adjacent locking components. The cumulative movable margin of each interlocking rod and each movable component linked with it is exactly equal to the maximum movable distance that the two movable components of a single locking component can slide open.

Description

Technical Field

[0001] This invention relates to the technical field of central lock structures, and in particular to a rotary lock linkage device suitable for multiple drawers. Background Technology

[0002] In the current furniture industry, when using cabinet furniture with multiple vertically arranged drawers, if multiple drawers are pulled out from the main body of the furniture at the same time, it is easy for the center of gravity of the cabinet furniture to tilt forward, causing the cabinet to tip over, which poses a significant safety risk. Accidents such as young children or the elderly being unable to dodge in time and being injured by falling objects often occur.

[0003] Therefore, to prevent multiple drawers from being pulled out simultaneously, patent CN116115023A discloses an interlocking device added to the drawer slides to solve the problem of multiple drawers being pulled out at the same time, thus preventing tipping. However, this type of drawer slide is limited to thin "ball bearing" slides, with limited compatibility, requiring specific slides for use, and cannot be directly applied to existing cabinet furniture. Secondly, patents such as AT1495U1 and DE19547049A1 disclose a coupling locking device for interlocking and restricting the interaction of drawers. This type of coupling locking device does not require the use of slides, but it is not only complex in structure, difficult to assemble, and expensive, but also has limited stability. In particular, pulling a drawer forcefully can unlock the coupling locking device, leading to the safety risk of multiple drawers being pulled out. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a rotary locking linkage device suitable for multiple drawers, which has the characteristics of being stable and reliable, simple in structure and easy to assemble.

[0005] To achieve the above objectives, the present invention provides a rotary locking linkage device suitable for multiple drawers, comprising at least two locking devices, each of which is correspondingly assigned to one of at least two drawers. An interlocking rod is disposed between any two adjacent locking devices. Each locking device includes a locking assembly mounted on the furniture body and a guide latch mounted on the drawer. The locking assembly includes a fixed base, a rotary locking member pivotally connected to the fixed base, and two opposing movable members slidably disposed on the fixed base. The guide latch is provided with a pre-locking mechanism for the rotary locking member. The eccentric portion of the molded part slides into or out of the guide groove, and the sliding guide eccentric portion drives the rotary locking component to switch between a predetermined locking position A and an unlocking position B. When the rotary locking component switches to the locking position A, the pre-formed top support of the rotary locking component pushes the two movable parts of the same locking component to slide open. The two ends of the interlocking rod are respectively pushed and linked with one movable part of each of the two adjacent locking components. The cumulative movable margin of each interlocking rod and each movable part linked with it is exactly equal to the maximum movable distance that the two movable parts of a single locking component can slide open.

[0006] Furthermore, the rotary locking component is pivotally connected to the fixed base via a pre-set locking shaft, wherein the shaft of the locking shaft extends vertically through the space between the two movable components and can be limited and abutted against the tail of either movable component that is slidingly closed.

[0007] Furthermore, both moving parts of the same locking assembly have tail blocks extending towards each other at their tail ends, wherein when the two moving parts slide together towards each other, the tail block of any moving part contacts the tail end of the other moving part.

[0008] Furthermore, the same rotary locking component has two symmetrically arranged top support portions that respectively abut against the tail ends of the two movable components. The fixed base has guide arc grooves that are rotationally symmetrical and allow the two top support portions to slide and fit together. As the rotary locking component switches between the locking position A and the unlocking position B, the top support portions slide synchronously between the locking end A1 and the unlocking end B1 preset in the guide arc groove.

[0009] Furthermore, the locking end A1 of the guide arc groove extends beyond the sliding direction of the movable member, so that the radial direction of the locking end A1 intersects the sliding direction of the movable member at an acute angle.

[0010] Furthermore, the fixed base is assembled from a lock base and a lock cover plate, wherein the lock base and the lock cover plate are assembled to form a slide for the two moving parts to slide against each other.

[0011] Furthermore, it also includes a cover for sliding insertion of the guide card. The outer surface of the cover has two opposing elastic guide keys with elastic deformation characteristics protruding near the guide groove inlet. The two elastic guide keys have opposing bulges at their midpoints, forming a channel aligned with the guide groove inlet between the two bulges. The elastic guide keys have front and rear inclined surfaces on their front and rear sides respectively, capable of engaging with the eccentric portion. When the locking assembly moves towards the guide card, causing the eccentric portion to engage with the guide card... When the rear inclined surface of the elastic guide key abuts, the rotary locking component gradually switches to the unlocked position as the eccentric part is pressed. At the same time, the elastic guide key is elastically collapsed and avoids the pressure of the eccentric part until the eccentric part jumps over the raised part and enters the enclosure area between the front inclined surface of the elastic guide key and the guide card. When the fixed component and the guide card move in opposite directions so that the eccentric part abuts against the front inclined surface of the elastic guide key in the enclosure area, the rotary locking component gradually switches to the locked position as the eccentric part is pressed until the eccentric part passes through the channel and relatively disengages from the card cover.

[0012] The present invention adopts the above-mentioned solution, and its beneficial effects are as follows: 1) The guide groove of the guide card limits the path of the eccentric part of the rotary lock, so as to guide the eccentric part to slide and drive the rotary lock to switch between the predetermined locking position A and unlocking position B, and cooperate with the top support to unlock or lock the moving part, which is simple and convenient to operate; 2) The interlocking rod pushes and links with the moving part to realize the interlocking function between each locking component, realizing the function that after a single drawer is pulled out, the other drawers are restricted from being pulled out, preventing tipping and ensuring safety and reliability; 3) The elastic guide key allows the eccentric part to collide and cooperate, so that the rotary lock can be switched to the unlocking position first and then to the locking position, which makes the initial installation between the guide card and the locking component easier and simple; 4) The structural design of the locking end of the guide arc groove extending over the sliding direction of the moving part makes the top support more stable and reliable when the drawer is pulled out forcefully, as the greater the force applied by the drawer is pulled out, the more stable and reliable it is. Attached Figure Description

[0013] Figure 1 This is a diagram illustrating the assembly of the furniture body and drawers.

[0014] Figure 2 This is an internal perspective view of the furniture body and drawers.

[0015] Figure 3 This is a schematic diagram showing the installation of the furniture body, locking components, and interlocking rod.

[0016] Figure 4 This is a schematic diagram showing the installation of the drawer, guide clips, and clip covers.

[0017] Figure 5 for Figure 4 A magnified view of a local F in the image.

[0018] Figure 6 A schematic diagram showing the locking component in the locked position.

[0019] Figure 7 A schematic diagram showing the rotary locking mechanism of the locking component in the unlocked position.

[0020] Figure 8 This is an exploded view of the locking component.

[0021] Figure 9 This is a schematic diagram of a rotary lock component.

[0022] Figure 10 This is a schematic diagram showing the rotary locking mechanism switching between the locked and unlocked positions.

[0023] Figure 11 This is a schematic diagram showing the synchronous sliding switching of the top support between the locking and unlocking ends.

[0024] Figure 12 This is a schematic diagram showing how the top support pushes the two movable parts to slide open.

[0025] Figure 13 This is a schematic diagram showing the limiting contact between the moving part and the locking shaft part.

[0026] Figure 14 This is a schematic diagram of the linkage mechanism in case one of the rotary lock linkage devices.

[0027] Figure 15 This is a schematic diagram of the linkage mechanism in case two of the rotary lock linkage device.

[0028] Figure 16 An exploded view of the guide card and its cover.

[0029] Figure 17 This is a schematic diagram showing the linkage between the eccentric part, the elastic guide key, and the guide groove.

[0030] Among them, 100-drawer, 200-furniture body, 1-locking component, 11-fixed base, 111-lock cover plate, 112-lock base, 113-slide rail, 114-guide arc groove, 12-turn lock component, 121-eccentric part, 122-top support part, 13-moving part, 131-tail top block, 14-lock shaft component, 2-guide clip, 21-guide groove, 3-interlocking rod, 4-clip cover, 41-elastic guide key, 41a-front slope, 41b-rear slope, 42-slot, A-locking position, B-unlocking position, A1-locking end, B1-unlocking end. Implementation

[0031] To facilitate understanding of the present invention, a more complete description is given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0032] See appendix Figure 1-4 As shown, in this embodiment, a rotary lock linkage device suitable for multiple drawers is applicable to a furniture body 200 with multiple vertically arranged drawers 100. The linkage device prevents multiple drawers 100 from being pulled out of the furniture body 200 simultaneously and tipping over. Specifically, it includes at least two locking devices, each assigned to one of at least two drawers 100. Furthermore, an interlocking rod 3 is configured between any two adjacent locking devices (the side panel of the furniture body 200 has a vertical groove for accommodating the interlocking rod 3). The interlocking rod 3 enables linkage between the locking devices, achieving the interlocking function that restricts the pulling out of other drawers 100 when one drawer 100 is pulled out of the furniture body 200.

[0033] For ease of explanation, this embodiment is illustrated in conjunction with the appendix. Figure 1-4 As shown, taking three drawers 100 arranged vertically in sequence as an example, there are three locking devices respectively assigned to the three drawers 100 and two interlocking rods 3 respectively linked to the three locking devices. The specific number is not limited here. Those skilled in the art can add or reduce the locking devices and interlocking rods 3 according to the actual number of drawers 100. The principle and function are the same.

[0034] In this embodiment, each locking device includes a locking component 1 mounted on the furniture body 200 and a guide clip 2 mounted on the drawer 100. Specifically, see the attached drawing. Figure 3 As shown, the locking assembly 1 is fixedly installed at a predetermined height position on the furniture body 200 using screws; see attached... Figure 4 As shown, the guide clip 2 is fixedly installed on the back of the panel of the drawer 100 by screws, and the locking component 1 of the same locking device is aligned with the guide clip 2.

[0035] See appendix Figure 6-9As shown, in this embodiment, the locking assembly 1 includes a fixed base 11, a rotary locking member 12 pivotally connected to the fixed base 11, and two opposing movable members 13 slidably placed on the fixed base 11. Specifically, the fixed base 11 in this embodiment is assembled from a lock base 112 and a lock cover plate 111, wherein the lock base 112 and the lock cover plate 111 are assembled to form a slide rail 113 for the two movable members 13 to slide against each other. During assembly, the two movable members 13 are pre-installed on the lock base 112, and then the lock cover plate 111 is installed on the lock base 112. At this time, the movable members 13 can slide along the slide rail 113 under the external pushing action. For ease of explanation, the end of the movable member 13 near the port of the slide rail 113 is defined as the head, and the other end near the center of the slide rail 113 is defined as the tail. The edge of the lock cover plate 111 is bent to form a folded edge that covers the edge of the lock base 112, and the folded edge extends to the sides of the slide 113 port so as to form a partial abutment limit on the head of the movable part 13, so that the movable part 13 is confined within the slide 113 and prevents it from sliding off the slide 113.

[0036] Specifically, see Appendix Figure 12 As shown, when the tails of the two movable parts 13 are subjected to an outward pushing force, the two movable parts 13 slide open in opposite directions toward the two ends of the slide rail 113; conversely, when the head of at least one movable part 13 is subjected to an inward pushing force, the two movable parts 13 slide close together. Furthermore, the tails of the two movable parts 13 of the same locking assembly 1 are each formed with an opposing tail top block 131, which is staggered relative to each other. When the two movable parts 13 slide close together, the tail top block 131 of the movable part 13 subjected to the pushing force contacts and engages with the tail of the other movable part 13, thereby causing the two movable parts 13 in the closed state to slide synchronously.

[0037] Specifically, see Appendix Figure 13 As shown, in this embodiment, the rotary locking member 12 is pivotally connected to the fixed base 11 via a pre-set locking shaft member 14. That is, the shaft of the locking shaft member 14 passes through the central hole of the rotary locking member 12 and connects to the fixed base 11 (equivalent to sequentially connecting the lock cover plate 111 and the lock base 112), allowing the rotary locking member 12 to rotate around the axial direction of the locking shaft member 14 (the rotary locking member 12 can also adopt a derivative motion mode, such as swinging, sliding, etc.). Secondly, the shaft of the locking shaft member 14 extends vertically through the space between the two movable members 13 (that is, the shaft of the locking shaft member 14 passes vertically through the center of the slide 113 and is located between the two movable members 13), and the shaft of the locking shaft member 14 can be limited and abutted against the tail of any movable member 13 that is slidingly closed. Thus, by the folded edge of the locking cover plate 111 abutting against the head of the movable part 13 and the shaft of the locking shaft 14 abutting against the movable part 13, the movable part 13 can be limited in its movable distance along the slide 113.

[0038] Furthermore, the tail top block 131 of the movable part 13 is correspondingly positioned to avoid unnecessary contact or interference between the tail top block 131 and the shaft of the locking shaft part 14.

[0039] In this embodiment, see Appendix Figure 5 As shown, the guide clip 2 is provided with a guide groove 21 for the pre-formed eccentric portion 121 of the rotary locking member 12 to slide into or out relative to it. Specifically, the guide groove 21 is an inclined groove extending obliquely to the rear end of the guide clip 2 along the drawer 100 pulling direction, and the guide groove 21 has an inlet at one end near the rear end of the guide clip 2. In addition, the eccentric portion 121 protrudes from the outer surface of the rotary locking member 12 and is eccentrically arranged relative to the rotation axis of the rotary locking member 12. Thus, see Appendix Figure 10 As shown, as the drawer 100 is pushed inward near the closed position, the guide clip 2 gradually approaches the locking component 1, causing the eccentric part 121 to align with the entrance of the guide groove 21 and slide into the guide groove 21. At this time, the eccentric part 121 is limited by the path of the guide groove 21, and the sliding guide eccentric part 121 drives the rotary locking component 12 to rotate in the forward direction, so that the rotary locking component 12 in the locked position A rotates to the unlocked position B. Conversely, as the drawer 100 is pulled outward near the closed position, the guide clip 2 moves away from the locking component 1, causing the eccentric part 121 to gradually slide out of the guide groove 21. At this time, the eccentric part 121 is limited by the path of the guide groove 21, and the sliding guide eccentric part 121 drives the rotary locking component 12 to rotate in the reverse direction, so that the rotary locking component 12 in the unlocked position B rotates to the locked position A.

[0040] Furthermore, the guiding path of the aforementioned guide groove 21 is not specifically limited. It is only necessary to ensure that the sliding guide eccentric part 121 can drive the rotary locking part 12 to rotate in both the forward and reverse directions. Those skilled in the art can design a guide groove 21 that meets the requirements according to actual requirements such as cost, materials, and installation position.

[0041] In this embodiment, see Appendix Figure 12 and 13 As shown, a top support 122 is protruding from the inner surface of the rotary locking member 12. The top support 122 extends through the lock cover plate 111 into the slide rail 113 and is located in the space between the two movable members 13. Thus, when the rotary locking member 12 rotates to the locked position A, the top support 122 of the rotary locking member 12 rotates accordingly and pushes the two movable members 13 to slide open in the slide rail 113. That is, the top support 122 applies a pushing force to the tail of the two movable members 13, pushing the two movable members 13 to gradually slide open towards each other along the slide rail 113 until the rotary locking member 12 reaches the locked position A and stops rotating. At this time, the head of the movable member 13 also partially abuts against the folded edge at the end of the slide rail 113 and stops sliding open.

[0042] To facilitate the pushing and sliding of the movable part 13 on both sides, see Appendix 122. Figure 12 and 13 As shown, in this embodiment, the same rotary locking member 12 has two symmetrically arranged top support portions 122 that respectively abut against the tails of the two movable members 13. Furthermore, the lock cover plate 111 (equivalent to the fixed base 11) has rotationally symmetrical guide arc grooves 114 (equivalent to the top support portions 122 extending through the two guide arc grooves 114 of the lock cover plate 111 into the slide rail 113) that allow the two top support portions 122 to slide and engage with each other. As the rotary locking member 12 rotates between the locked position A and the unlocked position B, the top support portions 122 synchronously slide between the preset locked end A1 and unlocked end B1 of the guide arc grooves 114. That is, when the rotary locking member 12 rotates to... When locked in position A, the top support 122 slides synchronously along the guide arc groove 114 to lock end A1, and the top support 122 at lock end A1 and the tail of movable part 13 form a top support engagement, thereby achieving the locking function of movable part 13; conversely, when the rotary lock 12 rotates to unlock position B, the top support 122 slides synchronously along the guide arc groove 114 to unlock end B1, and the top support 122 at unlock end B1 no longer supports the tail of movable part 13, thereby achieving the unlocking function of movable part 13.

[0043] Furthermore, the top support 122 and the eccentric part 121 are respectively located on two surfaces on opposite sides of the rotary lock 12, and the top support 122 and the eccentric part 121 are arranged perpendicularly.

[0044] In this embodiment, the two ends of the interlocking rod 3 are respectively pushed and linked with one movable part 13 in each of the two adjacent locking components 1. That is, the two ends of the interlocking rod 3 are respectively inserted into the pre-prepared slots in the heads of the two movable parts 13, so as to realize the three-way linkage between the interlocking rod 3 and the two movable parts 13 of different locking components 1.

[0045] In this embodiment, the cumulative movable margin of each interlocking rod 3 and each movable part 13 linked thereto is exactly equal to the maximum movable distance that the two movable parts 13 of a single locking component 1 can slide open. That is, when no drawer 100 is pulled open, the rotary locking parts 12 of the locking components 1 associated with each drawer 100 are all in the unlocked position B. At this time, the movable parts 13 are not supported by the top support 122 and are in a free and loose state. When any drawer 100 is pulled outward, the two movable parts 13 of the locking components 1 associated with it gradually slide open and push the movable parts 13 of the other locking components 1 to slide close by means of the interlocking rods 3. As the sliding distance of the two movable parts 13 gradually increases, the movable margin is gradually converted into the sliding opening distance of the movable parts 13, thereby compressing the movable distance of the other movable parts 13. At this time, the movable margin does not meet the sliding opening distance requirement of the movable parts 13 of the other locking components 1, thereby realizing the rotation restriction of the other rotating pieces and preventing other drawers 100 from being pulled outward.

[0046] To facilitate understanding, the working principle of specific embodiments will be explained below.

[0047] Scenario 1: See Appendix Figure 14 As shown, when the middle drawer 100 is pulled outward, firstly, the guide clip 2 and locking assembly 1 of the locking device associated with the middle drawer 100 disengage, causing the rotary locking member 12 of the middle locking assembly 1 to rotate from the unlocked position B to the locked position A (as shown in the attached diagram). Figure 10 As shown), at this time, the two movable parts 13 are pushed open by the top support 122 (as shown in the attached figure). Figure 12 As shown), and gradually occupy the movable margin; at the same time, during the sliding expansion, the two movable parts 13 will drive the two connected interlocking rods 3 to move towards the locking components 1 located on the upper and lower layers respectively, so that the other ends of the two interlocking rods 3 will push the movable parts 13 of the locking components 1 in the unlocked position B of the upper and lower layers respectively, causing the two movable parts 13 of the upper and lower layers to slide and close towards each other, until the two movable parts 13 of the upper and lower layers are in a fully closed state of mutual contact (as shown in the attached figure). Figure 13 (As shown).

[0048] Scenario 2: See Appendix Figure 15 As shown (the appendix) Figure 15 Taking the upper drawer being pulled outward as an example, the same applies to the lower drawer being pulled outward, only the direction is different (details will not be elaborated here). When the upper / lower drawer 100 is pulled outward, firstly, the guide clip 2 and locking component 1 of the upper / lower layer associated locking device disengage, causing the rotary locking member 12 of the upper / lower layer locking component 1 to rotate from the unlocked position B to the locked position A (as shown in the attached diagram). Figure 10As shown), at this time, the two movable parts 13 are pushed open by the top support 122 (as shown in the attached figure). Figure 12 As shown), and gradually occupy the movable margin; at the same time, during the sliding opening, one of the movable parts 13 will drive a connecting rod 3 connected to it to move towards the locking assembly 1 of the middle layer, so that the other end of the connecting rod 3 pushes a movable part 13 of the locking assembly 1 of the middle layer in the unlocked position B, causing the two movable parts 13 of the middle layer to slide and close towards each other; then, the two movable parts 13 of the middle layer are fully closed and slide synchronously by means of mutual contact, and the other movable part 13 of the middle layer drives another connecting rod 3 connected to it to move during the sliding, so that the other connecting rod 3 pushes one of the movable parts 13 of the lower / upper layer locking assembly 1 in the unlocked position B, causing the two movable parts 13 of the lower / upper layer to slide and close towards each other, until the tail of one of the movable parts 13 of each locking assembly 1 is limited and abuts against the shaft of the locking shaft 14 (as shown in the attached figure). Figure 13 As shown), this ultimately causes the two moving parts 13 of each locking component 1 in the unlocked position B to be in a fully closed state where they are mutually resisting.

[0049] Furthermore, when any one of the locking components 1 is in the locked position A, the two movable parts 13 of the other locking components 1, which are in the unlocked position B, are in a fully closed state of mutual contact. If another drawer 100 is pulled outward, the two movable parts 13 in the fully closed state will touch the limiting support part 122, preventing the rotary lock part 12 from rotating. This achieves the effect of restricting the eccentric part 121 from sliding out of the guide groove 21, thereby preventing the guide card part 2 from disengaging from the associated locking component 1, and ultimately achieving the effect of restricting the opening of other drawers 100.

[0050] See appendix Figure 11As shown, in order to ensure that the locking plate of the locking assembly 1 can stably maintain the locked position A, the locking end A1 of the guide arc groove 114 in this embodiment extends beyond the sliding direction of the movable member 13, so that the radial direction of the locking end A1 intersects the sliding direction of the movable member 13 at a certain acute angle. In this embodiment, the locking end A1 is offset relative to the sliding direction of the movable member 13 by about 0.5-3°, so that after the top support 122 pushes the movable member 13 to slide open into place, the locking end A1 still has a gap for the top support 122 to continue sliding. If the other drawers 100 are forcibly pulled open, the applied pulling force is transmitted by the associated locking device and interlocking rod 3 to the movable part 13 of the locking component 1 in the locked position A. At this time, the movable part 13 presses the top support 122 to continue sliding and occupying the reserved gap and squeezing the locking end A1, so that the movable part 13 and the top support 122 are arranged at a certain acute angle, so that the top support 122 is more stably fixed in the locking end A1 (the greater the external pulling force, the more stably the top support 122 is fixed in the locking end A1) and will not detach from the locking end A1. This ensures that the movable margin does not meet the distance requirement for the movable part 13 of the other locking components 1 to slide open, effectively preventing the drawer 100 from being forcibly pulled open.

[0051] In this embodiment, when the locking assembly 1 and the guide clip 2 are assembled for the first time, the rotary locking member 12 may be in any position between the locking position A and the unlocking position B. This causes the eccentric part 121 to not be aligned with the entrance of the guide groove 21 and thus cannot slide into the guide groove 21. Furthermore, due to the limited space at the installation location, the installer cannot effectively and quickly adjust the position of the rotary locking member 12 by hand or tools. Therefore, to address this problem, please refer to the appendix. Figure 16 and 17 As shown, this embodiment also includes a card cover 4 for sliding engagement of the guide card 2. The card cover 4 is formed with a slot 42 extending along the pull-out direction of the drawer 100. The guide card 2 is slidably inserted from the front end of the card cover 4 into the slot 42 to realize a sliding engagement assembly structure, which is more stable. At this time, the card cover 4 is used to cover the guide card 2. Especially after the drawer 100 is pulled out and opened, the user will not directly observe the guide card 2 and the guide groove 21, and the overall effect is more beautiful. Secondly, the outer side of the card cover 4 has two opposing elastic guide keys 41 with elastic deformation characteristics near the entrance of the guide groove 21 (specifically, one end of the elastic guide key 41 is integrally connected to the card cover 4, and the rest extends and protrudes from the outer side of the card cover 4, thereby realizing the elastic deformation characteristics of the elastic guide key 41). The two elastic guide keys 41 have raised sections facing each other in the middle, and a channel is formed between the two raised sections that is aligned with the entrance of the guide groove 21. The elastic guide key 41 has a front inclined surface 41a and a rear inclined surface 41b on the front and rear sides of the raised sections, which can contact and cooperate with the eccentric part 121.

[0052] Specifically, see Appendix Figure 17 As shown, during the initial installation, the installer first installs the locking component 1 and the guide card 2 into the designated positions on the furniture body 200 and the drawer 100, and then slowly pushes the drawer 100 inward to close it. Immediately afterward, when the drawer 100 is close to the closed position, the eccentric part 121 between the locked position A and the unlocked position B contacts the rear slope 41b of one of the elastic guide keys 41. At this time, since there is still space between the top support 122 and the unlocking end A2 of the guide arc groove 114, the force generated by the contact between the eccentric part 121 and the rear slope 41b of the elastic guide key 41 will force the rotary lock 12 to switch to the unlocked position B. At the same time, the elastic guide key 41 is elastically collapsed and avoided by the contact pressure of the eccentric part 121 until the eccentric part 121 jumps over the raised part and enters the enclosed area between the front slope 41a of the elastic guide key 41 and the guide card 2.

[0053] Subsequently, the installer slowly pulls the drawer 100 outwards, causing the locking component 1 and the guide clip 2 to move in opposite directions. The eccentric portion 121, in the unlocked position B, contacts the front inclined surface 41a of one of the elastic guide keys 41 within the enclosed area. At this time, because the top support 122 can move along the guide arc groove 114 towards the locking end A1, the force generated by the contact between the eccentric portion 121 and the front inclined surface 41a of the elastic guide key 41 forces the rotary locking component 12 to gradually switch and settle in the locking position A until the eccentric portion 121 passes through the channel and relatively disengages from the clip cover 4. This completes the assembly and alignment operation between the locking component 1 and the guide clip 2, achieving autonomous rotation of the rotary locking component 12 to complete the assembly. The operation is simple and quick. During subsequent normal use, the eccentric portion 121 can pass through the channel and align with the entrance of the guide groove 21, allowing it to slide smoothly into the guide groove 21.

[0054] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any modifications or variations made by those skilled in the art, without departing from the scope of the present invention, using the disclosed technical content, are equivalent embodiments of the present invention. Therefore, all equivalent changes made based on the concept of the present invention without departing from the scope of the present invention should be covered within the protection scope of the present invention.

Claims

1. A rotary locking linkage device suitable for multiple drawers, comprising at least two locking devices, each of the locking devices being assigned to one of at least two drawers (100), and an interlocking lever (3) disposed between any two adjacent locking devices, characterized in that: Each of the locking devices includes a locking assembly (1) mounted on the furniture body (200) and a guide latch (2) mounted on the drawer (100). The locking assembly (1) includes a fixed base (11), a rotary locking member (12) pivotally connected to the fixed base (11), and two opposing movable members (13) slidably placed on the fixed base (11). The guide latch (2) is provided with a guide groove (21) for the pre-formed eccentric portion (121) of the rotary locking member (12) to slide into or out of relative to each other, so that sliding the guide eccentric portion (121) drives the rotary locking member (12) to lock at a predetermined position. Switching between position (A) and unlock position (B); when the rotary locking member (12) switches to the locking position (A), the pre-formed top support (122) of the rotary locking member (12) pushes the two movable parts (13) of the same locking component (1) to slide open; the two ends of the interlocking rod (3) are respectively pushed and linked with one movable part (13) in each of the two adjacent locking components (1), wherein the movable margin of each interlocking rod (3) and each movable part (13) linked with it is exactly equal to the maximum movable distance that the two movable parts (13) of a single locking component (1) can slide open.

2. The rotary locking linkage device suitable for multiple drawers according to claim 1, characterized in that: The rotary locking member (12) is pivotally connected to the fixed base (11) via a pre-set locking shaft member (14), wherein the shaft of the locking shaft member (14) extends vertically through the space between the two movable members (13) and can be limited and abutted against the tail of any movable member (13) that is in sliding contact.

3. The rotary locking linkage device suitable for multiple drawers according to claim 1, characterized in that: Both movable parts (13) of the same locking component (1) are formed with opposing tail blocks (131) at their tail ends, wherein when the two movable parts (13) slide together, the tail block (131) of any movable part (13) abuts against the tail end of the other movable part (13).

4. A rotary locking linkage device suitable for multiple drawers according to claim 1, characterized in that: The same rotary locking member (12) has two symmetrically arranged top support parts (122) that abut against the tails of the two movable parts (13) respectively. The fixed base (11) has a guide arc groove (114) that is rotationally symmetrical and allows the two top support parts (122) to slide and fit together respectively. As the rotary locking member (12) switches between the locked position (A) and the unlocked position (B), the top support part (122) slides and switches synchronously between the locked end (A1) and the unlocked end (B1) of the guide arc groove (114).

5. A rotary locking linkage device suitable for multiple drawers according to claim 4, characterized in that: The locking end (A1) of the guide arc groove (114) extends over the sliding direction of the movable member (13) so that the radial direction of the locking end (A1) intersects the sliding direction of the movable member (13) at an acute angle.

6. A rotary locking linkage device suitable for multiple drawers according to claim 1, characterized in that: The fixed base (11) is assembled from a lock base (112) and a lock cover plate (111), wherein the lock base (112) and the lock cover plate (111) are assembled to form a slide (113) for the two movable parts (13) to slide against each other.

7. A rotary locking linkage device suitable for multiple drawers according to claim 6, characterized in that: The edge of the lock cover plate (111) is bent to form a folded edge that covers the edge of the lock base (112), and the folded edge extends to the sides of the slide (113) port, so that the folded edge forms a local abutment and limit on the head of the movable part (13).

8. A rotary locking linkage device suitable for multiple drawers according to claim 1, characterized in that: It also includes a card cover (4) for sliding insertion of the guide card (2). The outer side of the card cover (4) has two opposing elastic guide keys (41) with elastic deformation characteristics formed near the entrance of the guide groove (21). The two elastic guide keys (41) are raised in the middle and form a channel between the two raised parts that is aligned with the entrance of the guide groove (21). The elastic guide keys (41) have a front inclined surface (41a) and a rear inclined surface (41b) on the front and rear sides of the raised parts, which can contact and cooperate with the eccentric part (121). When the locking component (1) moves towards the guide card (2) so that the eccentric part (121) contacts the rear inclined surface (41b) of one of the elastic guide keys (41), the locking component (1) moves towards the guide card (2) so that the eccentric part (121) contacts the rear inclined surface (41b) of one of the elastic guide keys (41). When touched, the rotary locking member (12) gradually switches to the unlock position (B) as the eccentric part (121) is pressed. At the same time, the elastic guide key (41) is elastically collapsed and avoids the contact pressure of the eccentric part (121) until the eccentric part (121) jumps over the raised part and enters the enclosure area between the front slope (41a) of the elastic guide key (41) and the guide card (2). When the locking component (1) and the guide card (2) move in opposite directions so that the eccentric part (121) touches the front slope (41a) of one of the elastic guide keys (41) in the enclosure area, the rotary locking member (12) gradually switches to the locking position (A) as the eccentric part (121) is pressed until the eccentric part (121) passes through the channel and relatively disengages from the card cover (4).

Images