CN220117934U - Spin lock type linkage device suitable for multiple drawers - Google Patents

Abstract

The utility model discloses a rotary locking type linkage device suitable for multiple drawers, which comprises a locking assembly and a guide clamping piece, wherein the locking assembly comprises a fixed seat, a rotary locking piece pivoted on the fixed seat and two movable pieces which are oppositely arranged on the fixed seat in a sliding manner, wherein the guide clamping piece is provided with a guide groove for enabling an eccentric part preformed on the rotary locking piece to relatively slide in or out of the guide groove so as to slide and guide the eccentric part to drive the rotary locking piece to switch between a preset locking position A and an unlocking position B; when the rotary locking piece is switched to the locking position A, the propping parts preformed on the rotary locking piece push the two movable pieces of the same locking assembly to slide and prop open respectively; and two ends of the interlocking rod are respectively pushed and linked with each movable piece in the two adjacent locking assemblies, wherein the accumulated movable allowance of each interlocking rod and each movable piece linked with the interlocking rod is exactly equal to the maximum movable distance of the two movable pieces of the single locking assembly for sliding and expanding.

Description

Spin lock type linkage device suitable for multiple drawers

Technical Field

The utility model relates to the technical field of central lock structures, in particular to a twist-lock type linkage device applicable to multiple drawers.

Background

In the current furniture field, to the cabinet body furniture with a plurality of drawers of vertical arrangement in the use, if draw simultaneously and open a plurality of drawers from furniture main part, lead to the focus of cabinet body furniture forward to incline and appear the cabinet body forward to empty easily, there is great security risk, and the frequent accident condition such as infant or old man dodge and not reach and be injured by the smash.

Therefore, in order to prevent the plurality of drawers from being pulled out and opened simultaneously, an additional interlocking device is disclosed in the patent CN116115023a to solve the problem that the plurality of drawers can be pulled out simultaneously, and to achieve the effect of preventing tipping, but such drawer rails are limited to "rolling ball type" thin rails, and have limited adaptation range, and require specific rails to be used in combination, and cannot be directly used on the existing cabinet furniture. Secondly, in patents such as AT1495U1 and DE19547049A1, a coupling locking device for mutually linking and restricting each drawer is disclosed, and the coupling locking device does not need to be matched with a guide rail for use, but the coupling locking device has the advantages of complex structure, high assembly difficulty and high cost, and is limited in stability, and particularly, when the drawer is pulled strongly, the coupling locking device is unlocked, so that the safety risk that a plurality of drawers are pulled outwards and opened occurs.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide a rotary locking type linkage device suitable for multiple drawers, which has the characteristics of stability, reliability, simple structure, easiness in assembly and the like.

In order to achieve the above-mentioned objective, the present utility model provides a twist-lock type linkage device suitable for multiple drawers, comprising at least two locking devices, each locking device is correspondingly allocated to one of the at least two drawers, an interlock lever is configured between any two adjacent locking devices, each locking device comprises a locking component installed on a furniture body and a guiding clamping piece installed on the drawer, the locking component comprises a fixed seat, a twist-lock piece pivoted on the fixed seat, and two moving pieces oppositely sliding on the fixed seat, wherein the guiding clamping piece is provided with a guiding slot for the relative sliding in or out of an eccentric part preformed by the twist-lock piece, so that the sliding guiding eccentric part drives the twist-lock piece to switch between a predetermined locking position A and an unlocking position B; when the rotary locking piece is switched to the locking position A, the propping parts preformed on the rotary locking piece push the two movable pieces of the same locking assembly to slide and prop open respectively; and two ends of the interlocking rod are respectively pushed and linked with each movable piece in the two adjacent locking assemblies, wherein the accumulated movable allowance of each interlocking rod and each movable piece linked with the interlocking rod is exactly equal to the maximum movable distance of the two movable pieces of the single locking assembly for sliding and expanding.

Further, the rotary locking piece is pivoted on the fixed seat through a preset locking shaft piece, wherein the shaft body of the locking shaft piece extends vertically to penetrate through the space between the two movable pieces and can be in limit interference with the tail of any movable piece which is in sliding closure.

Further, the tail parts of the two movable parts of the same locking assembly are respectively formed into tail top blocks which extend in opposite directions, wherein when the two movable parts are closed in opposite directions in a sliding mode, the tail top block of any one movable part is in contact with the tail part of the other movable part in a propping mode.

Further, the same spin locking piece shaping has two symmetrical arrangement and respectively with two movable part afterbody top propping the propping portion that touches mutually, the fixing base has seted up and is rotationally symmetrical and supplies two propping portion to slide the guide arc groove of gomphosis mutually respectively, wherein, along with spin locking piece switches between locking position A and unlocking position B, makes the propping portion correspond and makes synchronous slip switch between the locking end A1 and unlocking end B1 that guide arc groove predetermines.

Further, the locking end A1 of the guiding arc groove extends to jump the sliding direction of the movable piece, so that the radial direction of the locking end A1 and the sliding direction of the movable piece form an acute angle.

Further, the fixing seat is formed by assembling a lock base and a lock cover plate, wherein the lock base and the lock cover plate are assembled to form a slideway for two movable pieces to slide.

The guide device comprises a guide groove, a guide block cover and a guide block cover, wherein the guide block is used for sliding insertion of the guide block, two elastic guide keys which are oppositely arranged and have elastic deformation characteristics are formed on the outer side surface of the guide block cover in a protruding mode at the position close to the inlet of the guide groove, the middle parts of the two elastic guide keys are oppositely protruded, and a channel which is aligned with the inlet of the guide groove is formed between the two protruded parts; when the locking component and the guide clamping piece move in opposite directions to enable the eccentric part to be in conflict with the rear inclined surface of the elastic guide key, the rotary locking piece is gradually switched to an unlocking position along with the pressing of the eccentric part, and meanwhile the elastic guide key is elastically collapsed and avoided under the pressing of the eccentric part until the eccentric part jumps over the bulge part and enters a surrounding area between the front inclined surface of the elastic guide key and the guide clamping piece; when the fixed component and the guide clamping piece reversely move to enable the eccentric part to be in contact with the front inclined surface of the elastic guide key in the shielding area, the rotary locking piece is gradually switched to the locking position along with the pressing of the eccentric part until the eccentric part passes through the channel and is separated from the clamping piece cover relatively.

The utility model adopts the scheme, and has the beneficial effects that: 1) The guide groove of the guide clamping piece is used for limiting the path of the eccentric part of the rotary locking piece so as to slide the eccentric part to drive the rotary locking piece to switch between a preset locking position A and an unlocking position B, and the rotary locking piece is matched with the propping part to unlock or lock the movable piece, so that the operation is simple and convenient; 2) The interlocking rod is in pushing linkage with the movable piece to realize the interlocking function among all the locking components, so that the function that the rest drawers are limited and can not be pulled out after a single drawer is pulled outwards to be opened is realized, the tipping is prevented, and the safety and the reliability are realized; 3) The elastic guide key is used for enabling the eccentric part to be in interference fit, so that the rotary locking piece is firstly pressed and switched to the unlocking position and then switched to the locking position, and therefore the primary installation between the guide clamping piece and the locking assembly is facilitated, and the installation is convenient and simple; 4) Through the structural design that the locking end of the guide arc groove extends to jump the sliding direction of the movable piece, the larger the acting force applied by the strong pull drawer is, the more stable and reliable the supporting part is fixed at the locking end.

Drawings

Fig. 1 is an assembled schematic view of a furniture body and a drawer.

Fig. 2 is an interior perspective view of a furniture body and drawer.

FIG. 3 is a schematic view of the installation of the furniture body, locking assembly and interlock lever.

Fig. 4 is a schematic view of the installation of the drawer, guide clip and clip cover.

Fig. 5 is an enlarged view of a portion F in fig. 4.

Fig. 6 is a schematic view of the twist lock of the locking assembly in the locked position.

Fig. 7 is a schematic view of the twist lock of the locking assembly in an unlocked position.

Fig. 8 is an exploded view of the locking assembly.

Fig. 9 is a schematic view of a twist lock.

Fig. 10 is a schematic view of the switching of the twist lock between the locked and unlocked positions.

Fig. 11 is a schematic diagram of synchronous sliding switching of the jack-up portion between the locking end and the unlocking end.

Fig. 12 is a schematic view of the pushing portion pushing the two moving members to slide and open.

Fig. 13 is a schematic view showing the interference between the movable member and the shaft body of the lock shaft member.

Fig. 14 is a schematic diagram of the first linkage of the twist-lock type linkage.

Fig. 15 is a schematic diagram of the second linkage of the twist-lock type linkage.

Fig. 16 is an exploded view of the guide clip and clip cover.

Fig. 17 is a schematic diagram showing the linkage of the eccentric portion and the elastic guide key and the guide groove.

The novel furniture comprises a 100-drawer, a 200-furniture body, A1-locking assembly, a 11-fixed seat, a 111-locking cover plate, a 112-locking base, a 113-slideway, a 114-guiding arc groove, a 12-rotating locking piece, a 121-eccentric part, a 122-supporting part, a 13-movable piece, a 131-tail jacking piece, a 14-locking shaft piece, a 2-guiding clamping piece, a 21-guiding groove, a 3-interlocking rod, a 4-clamping piece cover, a 41-elastic guiding key, a 41 a-front inclined surface, a 41B-rear inclined surface, a 42-slot, an A-locking position, a B-unlocking position, an A1-locking end and a B1-unlocking end.

Description of the embodiments

In order that the utility model may be understood more fully, the utility model will be described with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete.

Referring to fig. 1-4, in the present embodiment, a twist-lock type linkage device suitable for multiple drawers is suitable for a drawer 100 and a furniture body 200 with multiple vertical arrangements, and the linkage device is used to prevent multiple drawers 100 from being pulled out of the furniture body 200 at the same time to topple. In particular at least two locking means, each of which is assigned to one of the at least two drawers 100. Secondly, an interlocking rod 3 is arranged between any two adjacent locking devices (a vertical groove for accommodating the interlocking rod 3 is formed in a side plate of the furniture body 200), the interlocking between the locking devices is realized by means of the interlocking rod 3, and the interlocking function of restricting the other drawers 100 from being pulled out after one drawer 100 is pulled out from the furniture body 200 is realized.

For convenience of explanation, in this embodiment, three drawers 100 arranged vertically in sequence are taken as an example, and three locking devices respectively allocated to the three drawers 100 and two interlocking bars 3 respectively linked with the three locking devices are correspondingly included, so that the specific number is not limited, and those skilled in the art can correspondingly increase or decrease the locking devices and the interlocking bars 3 according to the actual number of the drawers 100 on the basis, and the principle and the function are the same.

In this embodiment, each locking means comprises a locking assembly 1 mounted on the furniture body 200 and a guide clip 2 mounted on the drawer 100. Specifically, referring to fig. 3, the locking assembly 1 is fixedly installed at a predetermined height position of the furniture body 200 by a screw; referring to fig. 4, the guide clip 2 is fixedly installed on the back of the panel of the drawer 100 by a screw, and the locking assembly 1 of the same locking device is aligned with the guide clip 2.

Referring to fig. 6-9, in the present embodiment, the locking assembly 1 includes a fixed base 11, a twist-lock member 12 pivotally connected to the fixed base 11, and two movable members 13 slidably disposed on the fixed base 11. Specifically, the fixing base 11 of the present embodiment is assembled by a lock base 112 and a lock cover 111, wherein the lock base 112 and the lock cover 111 are assembled to form a slide 113 for sliding the two movable members 13. During assembly, the two movable pieces 13 are embedded on the lock base 112 in advance, and then the lock cover plate 111 is covered on the lock base 112, so that the movable pieces 13 can correspondingly slide along the slide ways 113 under the external pushing action. For ease of explanation, the end of the movable member 13 near the end of the slideway 113 is defined herein as the head and the other end near the centre of the slideway 113 is the tail. The edge of the lock cover 111 is folded to form a folded edge covering the edge of the lock base 112, and the folded edge also extends to protrude out of two side positions of the port of the slideway 113, so as to form local interference limit for the head of the movable piece 13, so that the movable piece 13 is limited in the slideway 113 to prevent sliding from falling out of the slideway 113.

Specifically, referring to fig. 12, when the tail portions of the two movable members 13 are respectively pushed outward, the two movable members 13 are respectively slid and spread toward the two end portions of the slideway 113; conversely, when the head of at least one movable member 13 is pushed inward, the two movable members 13 slide towards each other. Secondly, the tail parts of the two movable pieces 13 of the same locking assembly 1 are respectively formed with tail top blocks 131 which extend in opposite directions, and the two tail top blocks 131 are arranged in a staggered manner, wherein when the two movable pieces 13 are folded in a sliding manner in opposite directions, the tail top blocks 131 of the movable pieces 13 under the pushing action are in contact with the tail parts of the other movable pieces 13, so that the two movable pieces 13 in the folded state slide synchronously.

Specifically, referring to fig. 13, the twist-lock member 12 of the present embodiment is pivotally connected to the fixing base 11 through a preset lock shaft member 14, that is: the shaft body of the lock shaft member 14 passes through the central hole of the twist lock member 12 and then is connected with the fixed seat 11 (corresponding to the sequential penetrating connection of the lock cover 111 and the lock base 112), so that the twist lock member 12 can rotate around the axial direction of the lock shaft member 14 (the twist lock member 12 can also adopt a phase-derived movement mode, such as swinging, sliding and the like). Secondly, the shaft body of the lock shaft member 14 extends vertically through the space between the two movable members 13 (i.e. the shaft body of the lock shaft member 14 vertically passes through the center of the slideway 113 and is between the two movable members 13), and the shaft body of the lock shaft member 14 can be in limit interference with the tail of any movable member 13 which is in sliding closure. Therefore, the movable piece 13 is limited by the abutting of the folded edge of the lock cover 111 and the head of the movable piece 13 and the limiting abutting of the shaft body of the lock shaft 14, so that the movable distance of the single movable piece 13 along the slideway 113 is limited.

Further, the tail top block 131 of the movable member 13 is correspondingly kept away from the shaft body of the lock shaft member 14, so that unnecessary interference between the tail top block 131 and the shaft body is avoided.

In this embodiment, referring to fig. 5, the guide clip 2 is provided with a guide groove 21 into or out of which an eccentric portion 121 preformed in the spin lock 12 is slid relatively. Specifically, the guide groove 21 is a chute that extends obliquely to the rear end portion of the guide clip 2 in the drawing direction of the drawer 100, and the guide groove 21 serves as an inlet at an end adjacent to the rear end portion of the guide clip 2. In addition, the eccentric portion 121 is formed on the outer surface of the twist lock 12 in a protruding manner and is arranged eccentrically with respect to the rotation axis of the twist lock 12. Therefore, as shown in fig. 10, with the drawer 100 pushing inward near the closed position, the guide clamping member 2 can gradually approach the locking assembly 1, so that the eccentric portion 121 is aligned with the entrance of the guide slot 21 and slides relatively into the guide slot 21, and the eccentric portion 121 is limited by the path of the guide slot 21 to slide and guide the eccentric portion 121 to drive the rotation locking member 12 to rotate forward, so that the rotation of the rotation locking member 12 at the locking position a is switched to the unlocking position B; conversely, as the drawer 100 is pulled outward near the closed position, the guiding clip 2 can be far away from the locking assembly 1, so that the eccentric portion 121 gradually slides out of the guiding groove 21, and the eccentric portion 121 is limited by the path of the guiding groove 21, so that the sliding guiding eccentric portion 121 drives the rotary locking member 12 to rotate reversely, and the rotary locking member 12 in the unlocking position B is switched to the locking position a.

Further, the guiding path of the guiding groove 21 is not particularly limited, and only the guiding eccentric portion 121 is required to be ensured to slide to drive the rotation locking member 12 to rotate forward and backward, and those skilled in the art can correspondingly design the guiding groove 21 meeting the requirements according to the actual requirements of cost, materials, installation position and the like.

In this embodiment, referring to fig. 12 and 13, the inner surface of the twist lock 12 is convexly formed with a propping portion 122, and the propping portion 122 extends through the lock cover 111 to a space between the two movable members 13 within the slideway 113. Therefore, when the rotation of the rotary locking member 12 is switched to the locking position a, the propping portion 122 of the rotary locking member 12 rotates along with the rotation and pushes the two movable members 13 to slide and prop open respectively in the slideway 113, that is, the propping portion 122 applies pushing action to the tail portions of the two movable members 13 respectively to push the two movable members 13 to slide and prop open gradually and oppositely along the slideway 113 until the rotary locking member 12 stops rotating after reaching the locking position a, and at the moment, the head of the movable member 13 also collides with the folded edge at the port of the slideway 113 locally to stop sliding and prop open.

In order to make the propping portion 122 more convenient for pushing the movable member 13 to slide and prop open in opposite directions, as shown in fig. 12 and 13, the same twist-lock member 12 of the present embodiment is formed with two propping portions 122 symmetrically arranged and respectively propped against the tail portions of the two movable members 13. Secondly, the lock cover 111 (corresponding to the fixing seat 11) is provided with rotationally symmetrical guide arc grooves 114 for sliding and jogging the two propping parts 122 respectively (corresponding to the propping parts 122 respectively penetrating the two guide arc grooves 114 of the lock cover 111 and extending into the slide way 113), wherein as the rotary locking piece 12 rotates and switches between the locking position A and the unlocking position B, the propping parts 122 correspondingly switch between a locking end A1 and an unlocking end B1 preset by the guide arc grooves 114 in a synchronous sliding way, namely, when the rotary locking piece 12 rotates and switches to the locking position A, the propping parts 122 synchronously slide and switch to the locking end A1 along the guide arc grooves 114, and the propping parts 122 positioned at the locking end A1 are in propping fit with the tail part of the movable piece 13, so that the locking effect of the movable piece 13 is realized; on the contrary, when the rotation of the spin lock 12 is switched to the unlocking position B, the supporting portion 122 slides along the guiding arc groove 114 synchronously therewith to switch to the unlocking end B1, and the supporting portion 122 at the unlocking end B1 no longer supports the tail of the movable member 13, so as to realize the unlocking effect of the movable member 13.

Further, the propping portions 122 and the eccentric portions 121 are respectively located on both surfaces of opposite sides of the twistlock 12, and the propping portions 122 are arranged perpendicularly to the eccentric portions 121.

In this embodiment, two ends of the interlocking rod 3 are respectively pushed and linked with each movable member 13 in two adjacent locking assemblies 1, that is, two ends of the interlocking rod 3 are respectively inserted into grooves pre-arranged at the heads of two movable members 13, so as to realize linkage between the interlocking rod 3 and the two movable members 13 of different locking assemblies 1.

In this embodiment, the movable allowance accumulated by each interlocking rod 3 and each movable member 13 linked therewith is exactly equal to the maximum movable distance of the two movable members 13 of the single locking assembly 1 for sliding and expanding. That is, when no drawer 100 is pulled open, the spin lock members 12 of the lock assemblies 1 associated with the respective drawers 100 are in the unlocking position B, and the movable member 13 is in a free loose state without being supported by the supporting portion 122; when any drawer 100 is pulled outwards to be opened, the two movable pieces 13 of the associated locking assembly 1 gradually slide and open, and the movable pieces 13 of the other locking assemblies 1 are pushed by means of the interlocking rods 3 to slide and close, so that the movable allowance is gradually converted into the sliding and opening distance of the movable pieces 13 along with the gradual increase of the sliding and opening moving distance of the two movable pieces 13, the movable allowance at the moment does not meet the sliding and opening distance requirement of the movable pieces 13 of the other locking assemblies 1, and the rotary limiting of the other rotary pieces is realized, so that the function of preventing other drawers 100 from being pulled outwards to be opened is achieved.

For ease of understanding, the following description is made in connection with the working principles of specific embodiments.

Case one: referring to fig. 14, when the middle drawer 100 is pulled outward to be opened, first, the guide clip 2 and the locking assembly 1 of the locking device associated with the middle drawer 100 are disengaged, so that the rotation lock 12 of the locking assembly 1 of the middle drawer is rotated and switched from the unlocking position B to the locking position a (as shown in fig. 10), and at this time, the two movable pieces 13 are pushed by the propping portion 122 to slide and prop open (as shown in fig. 12), and gradually occupy the movable allowance; simultaneously, the two movable pieces 13 drive the two connected interlocking bars 3 to move towards the locking assemblies 1 positioned at the upper layer and the lower layer respectively during the sliding and opening process, so that the other ends of the two interlocking bars 3 push the movable pieces 13 of the locking assemblies 1 positioned at the unlocking position B at the upper layer and the lower layer respectively, and the two movable pieces 13 at the upper layer and the lower layer slide and fold in opposite directions until the two movable pieces 13 at the upper layer and the lower layer are in a completely folded state (as shown in figure 13) which is mutually contradicted.

And a second case: referring to fig. 15 (in fig. 15, the case that the upper drawer is pulled out and opened is taken as an example, the same applies to the case that the lower drawer is pulled out and opened only in different directions, and the description is not repeated here), when the drawer 100 located at the upper layer/lower layer is pulled out and opened, firstly, the guide clamping piece 2 and the locking assembly 1 of the locking device associated with the upper layer/lower layer are disengaged, so that the spin locking piece 12 of the locking assembly 1 of the upper layer/lower layer is rotated and switched from the unlocking position B to the locking position a (as shown in fig. 10), and at this time, the two movable pieces 13 are slid and opened (as shown in fig. 12) under the pushing action of the top supporting portion 122, and gradually occupy the movable allowance; simultaneously, one movable piece 13 drives one interlocking rod 3 connected with the movable piece to move towards the middle-layer locking component 1 during sliding and expanding, so that the other end of the interlocking rod 3 pushes one movable piece 13 of the middle-layer locking component 1 in the unlocking position B, and the two movable pieces 13 of the middle layer are correspondingly slid and folded; next, the two movable pieces 13 in the middle layer are completely folded and slide synchronously under the mutual propping action, the other movable piece 13 in the middle layer drives the other interlocking rod 3 connected with the movable piece to move during the sliding, the other interlocking rod 3 pushes one movable piece 13 of the locking assembly 1 in the unlocking position B in a propping way, so that the two movable pieces 13 in the lower layer/the upper layer slide and fold in opposite directions until the tail part of one movable piece 13 in each locking assembly 1 is in limit interference with the shaft body of the locking shaft piece 14 (as shown in fig. 13), and finally, the two movable pieces 13 of each locking assembly 1 in the unlocking position B are in a mutually-interference complete folding state.

Further, when any one of the locking assemblies 1 is at the locking position a, the two movable members 13 of the other locking assemblies 1 in the unlocking position B are in a completely closed state in which they are in contact with each other, and if the other drawer 100 is pulled out again, the two movable members 13 in the completely closed state contact the limiting support 122, so that the rotation of the rotary locking member 12 is not possible, thereby achieving the effect of limiting the eccentric portion 121 to slide out of the guiding groove 21, further making the guiding clip 2 unable to separate from the associated locking assembly 1, and finally achieving the effect of limiting the opening of the other drawers 100.

Referring to fig. 11, in order to stably maintain the state of the locking position a by the rotary lock tab of the locking assembly 1, the locking end A1 of the guide arc groove 114 of the present embodiment extends over the sliding direction of the movable member 13 such that the radial direction of the locking end A1 intersects the sliding direction of the movable member 13 at an acute angle. The locking end A1 of the embodiment extends and deviates from the sliding direction of the movable member 13 by about 0.5-3 °, so that the top supporting portion 122 is still separated by a gap for the top supporting portion 122 to continue sliding after the top movable member 13 is slid and supported in place. If the situation that the rest of drawers 100 are opened by strong pulling occurs, the applied strong pulling force is transmitted to the movable part 13 of the locking assembly 1 at the locking position a by the associated locking device and the interlocking rod 3, and at this time, the movable part 13 presses the propping part 122 to slide continuously to occupy the reserved gap and squeeze the locking end A1, so that the movable part 13 and the propping part 122 are arranged at a certain acute angle, the propping part 122 is more stably fixed in the locking end A1 (the larger the strong pulling force applied by the outside is, the more stably fixed in the locking end A1) and cannot be separated from the locking end A1, the movable allowance is ensured to not meet the sliding and opening distance requirement of the movable part 13 of the rest of locking assembly 1, and the drawers 100 are effectively prevented from being opened by strong pulling.

In this embodiment, when the locking assembly 1 and the guide clip 2 are assembled for the first time, the twist-lock 12 may be at any position between the locking position a and the unlocking position B, so that the eccentric portion 121 is not aligned with the entrance of the guide groove 21 and cannot slide into the guide groove 21, and due to the narrow installation position space, the installer cannot perform effective and rapid position adjustment on the twist-lock 12 by hand or by using a tool. Therefore, with respect to this problem, referring to fig. 16 and 17, the present embodiment further includes a clip cover 4 for slidably clamping the guide clip 2, wherein the clip cover 4 is formed with a slot 42 extending along the drawing direction of the drawer 100, and the guide clip 2 is slidably inserted into the slot 42 from the front end of the clip cover 4 to realize a sliding clamping assembly structure, which is more stable. The clip cover 4 is used for shielding the guide clip 2, especially after the drawer 100 is pulled out and opened, the user can not directly observe the guide clip 2 and the guide groove 21, and the overall effect is more attractive; next, the outer side surface of the clip cover 4 is formed with two elastic guide keys 41 which are arranged oppositely and have elastic deformation characteristics (specifically, one end of each elastic guide key 41 is integrally connected to the clip cover 4, the other parts extend and hang to protrude out of the outer side surface of the clip cover 4, thus realizing the elastic deformation characteristics of the elastic guide keys 41), wherein the middle parts of the two elastic guide keys 41 are oppositely protruded, a channel aligned with the inlet of the guide groove 21 is formed between the two protruded parts, and the front inclined surface 41a and the rear inclined surface 41b which can be in contact fit with the eccentric part 121 are correspondingly formed on the front side and the rear side of the protruded part of the elastic guide key 41.

Specifically, referring to fig. 17, when the locking assembly 1 and the guide clip 2 are first installed, after the locking assembly 1 and the guide clip 2 are installed at the designated positions of the furniture body 200 and the drawer 100, the drawer 100 is gradually pushed inward and closed gradually, and then when the drawer 100 approaches to the closed position, the eccentric portion 121 between the locking position a and the unlocking position B contacts with the rear inclined surface 41B of one of the elastic guide keys 41, and at this time, a space allowance is still provided between the top support portion 122 and the unlocking end A2 of the guide arc groove 114, so that the force generated by the contact between the eccentric portion 121 and the rear inclined surface 41B of the elastic guide key 41 can force the rotary lock 12 to switch and fix to the unlocking position B, and at the same time, the elastic guide key 41 is pressed by the contact of the eccentric portion 121 to elastically collapse and dodge until the eccentric portion 121 passes through the raised position and enters the surrounding area between the front inclined surface 41a of the elastic guide key 41 and the guide clip 2.

Then, the installer gradually pulls out the drawer 100 slowly, so that the locking assembly 1 and the guide clamping piece 2 move reversely, the eccentric part 121 in the unlocking position B contacts with the front inclined surface 41a of one of the elastic guide keys 41 in the shielding area, at this time, the supporting part 122 can move towards the locking end A1 along the guide arc groove 114, so that the acting force generated by the contact between the eccentric part 121 and the front inclined surface 41a of the elastic guide key 41 can force the rotary locking piece 12 to gradually switch and fix in the locking position a until the eccentric part 121 passes through the channel and is separated from the clamping piece cover 4 relatively, and the assembly correction operation between the locking assembly 1 and the guide clamping piece 2 is completed, so that the rotary locking piece 12 can automatically rotate to the position to complete the assembly, and the operation is simple, convenient and quick. The eccentric portion 121 may be passed through the channel and aligned with the entrance of the guide slot 21 for smooth sliding into the guide slot 21 during subsequent normal use.

The above-described embodiments are merely preferred embodiments of the present utility model, and are not intended to limit the present utility model in any way. Any person skilled in the art, using the disclosure above, may make many more possible variations and modifications of the technical solution of the present utility model, or make many more modifications of the equivalent embodiments of the present utility model without departing from the scope of the technical solution of the present utility model. Therefore, all equivalent changes made according to the inventive concept are covered by the protection scope of the utility model without departing from the technical scheme of the utility model.

Claims (8)

1. A twist-lock linkage suitable for multiple drawers, comprising at least two locking devices, each of said locking devices being assigned to one of at least two drawers (100), between any adjacent two of said locking devices an interlock lever (3) is arranged, characterized in that:

each locking device comprises a locking assembly (1) arranged on a furniture body (200) and a guide clamping piece (2) arranged on a drawer (100), wherein the locking assembly (1) comprises a fixed seat (11), a rotary locking piece (12) pivoted on the fixed seat (11) and two movable pieces (13) which are arranged on the fixed seat (11) in a sliding way in opposite directions, wherein the guide clamping piece (2) is provided with a guide groove (21) for enabling an eccentric part (121) preformed by the rotary locking piece (12) to relatively slide into or out of the guide groove so as to slide and guide the eccentric part (121) to drive the rotary locking piece (12) to switch between a preset locking position (A) and an unlocking position (B); when the rotary locking piece (12) is switched to the locking position (A), the preformed propping parts (122) of the rotary locking piece (12) respectively push the two movable pieces (13) of the same locking assembly (1) to slide and prop open; the two ends of the interlocking rod (3) are respectively pushed and linked with each movable piece (13) in the two adjacent locking assemblies (1), wherein the movable allowance accumulated by each interlocking rod (3) and each movable piece (13) linked with the interlocking rod is exactly equal to the maximum movable distance for sliding and expanding the two movable pieces (13) of the single locking assembly (1).

2. A twist-lock type linkage for multiple drawers as claimed in claim 1, wherein: the rotary locking piece (12) is pivoted on the fixed seat (11) through a preset locking shaft piece (14), wherein the shaft body of the locking shaft piece (14) extends vertically to pass through the space between the two movable pieces (13) and can be in limit collision with the tail of any movable piece (13) which is in sliding closure.

3. A twist-lock type linkage for multiple drawers as claimed in claim 1, wherein: the tail parts of the two movable pieces (13) of the same locking assembly (1) are respectively provided with a tail top block (131) which extends in opposite directions, wherein when the two movable pieces (13) slide in opposite directions and close, the tail top block (131) of any movable piece (13) is in contact with the tail part of the other movable piece (13).

4. A twist-lock type linkage for multiple drawers as claimed in claim 1, wherein: the same spin locking piece (12) shaping has two symmetrical arrangement and respectively with two propping portion (122) that movable part (13) afterbody contacted mutually, fixing base (11) have been seted up and are rotational symmetry and respectively supply two guide arc groove (114) of propping portion (122) looks slip gomphosis, wherein, along with spin locking piece (12) switch between locking position (A) and unlocking position (B), make propping portion (122) correspond and do synchronous slip switch between guide arc groove (114) default locking end (A1) and unlocking end (B1).

5. A twist-lock type linkage for multiple drawers as claimed in claim 4, wherein: the locking end (A1) of the guide arc groove (114) extends to jump the sliding direction of the movable piece (13) so that the radial direction of the locking end (A1) and the sliding direction of the movable piece (13) form an acute angle.

6. A twist-lock type linkage for multiple drawers as claimed in claim 1, wherein: the fixed seat (11) is formed by assembling 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 slideway (113) for two movable pieces (13) to slide.

7. A twist-lock type linkage for multiple drawers as claimed in claim 6, wherein: the edge of the lock cover plate (111) is bent to form a folded edge wrapping the edge of the lock base (112), and the folded edge also extends to protrude out of two side positions of the port of the slideway (113), so that the folded edge forms local interference limit on the head of the movable piece (13).

8. A twist-lock type linkage for multiple drawers as claimed in claim 1, wherein: the device further comprises a clamping piece cover (4) for guiding the clamping piece (2) to be in sliding connection, wherein two elastic guide keys (41) which are oppositely arranged and have elastic deformation characteristics are formed on the outer side surface of the clamping piece cover (4) near the inlet of the guide groove (21), the middle parts of the two elastic guide keys (41) are oppositely bulged, a channel which is aligned with the inlet of the guide groove (21) is formed between the two bulged parts, and a front inclined surface (41 a) and a rear inclined surface (41 b) which can be in touching fit with the eccentric part (121) are correspondingly formed on the front side and the rear side of the bulged part of the elastic guide key (41); when the locking assembly (1) and the guide clamping piece (2) move in opposite directions so as to enable the eccentric part (121) to be in contact with the rear inclined surface (41B) of one elastic guide key (41), the rotary locking piece (12) is gradually switched to the unlocking position (B) along with the pressing of the eccentric part (121), and meanwhile the elastic guide key (41) is elastically collapsed and avoided under the pressing of the eccentric part (121) until the eccentric part (121) jumps over the bulge part and enters a shielding region between the front inclined surface (41 a) of the elastic guide key (41) and the guide clamping piece (2); when the locking assembly (1) and the guide clamping piece (2) move reversely to enable the eccentric part (121) to touch the front inclined surface (41 a) of one elastic guide key (41) in the shielding area, the rotary locking piece (12) is gradually switched to the locking position (A) along with the pressing of the eccentric part (121) until the eccentric part (121) passes through the channel and is relatively separated from the clamping piece cover (4).