阅读说明：本技术 一种双锁止头枕导套结构 (Double-locking headrest guide sleeve structure ) 是由 徐朝刚 段永超 李侠 陈奕权 苏振 于 2020-06-24 设计创作，主要内容包括：本发明涉及一种双锁止头枕导套结构,其包括头枕杆和套在头枕杆上锁定配合的双锁止导套,其中,头枕杆具有直槽和燕尾槽,双锁止导套包括按钮、导套本体、第一锁止片和第二锁止片,其中,安装到导套本体上的第一锁止片与直槽配合锁定,安装到导套本体上的第二锁止片与燕尾槽配合锁定,按钮安装到导套本体上且同时作用于第一锁止片和第二锁止片以实现同时解锁。根据本发明的双锁止头枕导套结构,具有两个锁止结构,能够提高头枕导套的锁止强度,解锁时一键驱动第一锁止片和第二锁止片同时解锁,方便快捷。(The invention relates to a double-locking headrest guide sleeve structure which comprises a headrest rod and a double-locking guide sleeve sleeved on the headrest rod and locked and matched with the headrest rod, wherein the headrest rod is provided with a straight groove and a dovetail groove, the double-locking guide sleeve comprises a button, a guide sleeve body, a first locking piece and a second locking piece, the first locking piece mounted on the guide sleeve body is matched and locked with the straight groove, the second locking piece mounted on the guide sleeve body is matched and locked with the dovetail groove, and the button is mounted on the guide sleeve body and acts on the first locking piece and the second locking piece simultaneously to realize simultaneous unlocking. The double-locking headrest guide sleeve structure provided by the invention has two locking structures, the locking strength of the headrest guide sleeve can be improved, the first locking piece and the second locking piece are driven to be unlocked simultaneously by one key during unlocking, and the double-locking headrest guide sleeve structure is convenient and quick.)

1. The utility model provides a double-locking headrest guide sleeve structure, it includes the headrest pole, a serial communication port, this double-locking headrest guide sleeve structure is still including the double-locking guide sleeve of cover locking complex on the headrest pole, wherein, the headrest pole has straight flute and dovetail, double-locking guide sleeve includes the button, the guide sleeve body, first locking plate and second locking plate, wherein, install the first locking plate and the straight flute cooperation locking on the guide sleeve body, install the second locking plate and the dovetail cooperation locking on the guide sleeve body, the button is installed on the guide sleeve body and is acted on first locking plate and second locking plate in order to realize unblock simultaneously.

2. The dual-locking headrest guide sleeve structure of claim 1, wherein the dual-locking guide sleeve further includes a transmission lever rotatably mounted on the guide sleeve body, the button acting on the second locking tab through the transmission lever.

3. The dual locking headrest sleeve structure of claim 2, wherein the actuator lever has opposite first and second ends, the first end in contact with the button and the second end in contact with the second locking tab.

4. The dual-locking headrest guide sleeve structure of claim 1, wherein the first and second locking tabs are each a locking tab having a reset mechanism.

5. The dual locking headrest guide sleeve structure as claimed in claim 1, wherein the guide sleeve body is a cylindrical structure having a central through hole, the first locking piece includes a U-shaped body and a return spring, and the U-shaped body abuts against the guide sleeve body through the return spring after passing over the central through hole of the guide sleeve body.

6. The double-locking headrest guide sleeve structure as claimed in claim 5, wherein the bottom wall of the U-shaped body of the first locking piece is clamped into the straight groove of the headrest rod for matching locking.

7. The dual-locking headrest guide sleeve structure as claimed in claim 6, wherein the second locking plate comprises a vertical section and a bent section, and an end of the vertical section far from the bent section is clamped and fixed in a corresponding clamping groove of the guide sleeve body.

8. The dual-locking headrest guide sleeve structure according to claim 7, wherein the bottom rib of the bent section of the second locking piece is clamped into the dovetail groove of the headrest rod to be locked in cooperation.

9. The dual-locking headrest guide sleeve structure according to claim 8, wherein the bottom wall of the U-shaped body of the first locking piece has a size corresponding to that of the straight groove of the headrest rod, and the bottom rib of the bent section of the second locking piece has a size smaller than that of the opening of the dovetail groove of the headrest rod.

10. The dual locking headrest guide sleeve structure of claim 1, wherein the dovetail slot has an upwardly projecting interior into which the second lock tab enters to prevent sliding down upon failure of the first lock tab.

Technical Field

The invention relates to headrest locking, in particular to a double-locking headrest guide sleeve structure.

Background

Only one locking structure is arranged on the existing headrest guide sleeve, and the locking strength is limited. When the locking structure fails, the headrest is then disabled.

Disclosure of Invention

In order to solve the problem that the locking strength of a headrest guide sleeve in the prior art is limited, the invention provides a double-locking headrest guide sleeve structure.

The double-locking headrest guide sleeve structure comprises a headrest rod and a double-locking guide sleeve sleeved on the headrest rod and locked and matched with the headrest rod, wherein the headrest rod is provided with a straight groove and a dovetail groove, the double-locking guide sleeve comprises a button, a guide sleeve body, a first locking piece and a second locking piece, the first locking piece mounted on the guide sleeve body is matched and locked with the straight groove, the second locking piece mounted on the guide sleeve body is matched and locked with the dovetail groove, and the button is mounted on the guide sleeve body and acts on the first locking piece and the second locking piece simultaneously to realize simultaneous unlocking.

Preferably, the double-locking guide sleeve further comprises a transmission lever rotatably mounted on the guide sleeve body, and the button acts on the second locking piece through the transmission lever.

Preferably, the actuating lever has opposite first and second ends, the first end contacting the button and the second end contacting the second latch tab.

Preferably, the first lock piece and the second lock piece are respectively lock pieces having a reset mechanism.

Preferably, the guide pin bushing body is the cylindricality structure that has central perforating hole, and first locking plate includes U type body and reset spring, and the U type body passes through reset spring butt guide pin bushing body after crossing the central perforating hole of guide pin bushing body.

Preferably, the bottom wall of the U-shaped body of the first locking piece is clamped into the straight groove of the headrest rod to be matched and locked.

Preferably, the second locking piece comprises a vertical section and a bent section, and the end part of the vertical section, which is far away from the bent section, is clamped in a corresponding clamping groove of the guide sleeve body to be fixed.

Preferably, the bottom rib of the bent section of the second locking piece is clamped into the dovetail groove of the headrest rod to be matched and locked.

Preferably, the bottom wall of the U-shaped body of the first locking piece has a size corresponding to the size of the straight groove of the headrest rod, and the bottom rib of the bent section of the second locking piece has a size smaller than the size of the opening of the dovetail groove of the headrest rod.

Preferably, the dovetail groove has an upwardly projecting interior into which the second locking tab enters after failure of the first locking tab to prevent sliding down.

The double-locking headrest guide sleeve structure provided by the invention has two locking structures, the locking strength of the headrest guide sleeve can be improved, the first locking piece and the second locking piece are driven to be unlocked simultaneously by one key during unlocking, and the double-locking headrest guide sleeve structure is convenient and quick. Particularly, in the collision process, when the inserted bar atress, first locking piece atress earlier, in case first locking piece became invalid, just atress of second locking piece, simultaneously through the cooperation with the notch, prevent that the headrest from gliding. In addition, the double-locking headrest guide sleeve structure can be used as a platform part and applied to various seats.

Drawings

FIG. 1 is an assembled schematic view of a dual locking headrest guide structure according to a preferred embodiment of the invention;

FIG. 2 is an assembled schematic view of the dual locking guide sleeve of FIG. 1;

FIG. 3 is a partial cross-sectional view of the dual latching headrest guide structure of FIG. 1 from an initial state to an unlatched state;

FIG. 4 is a cross-sectional view of the double locking guide sleeve of FIG. 2 from an initial state to an unlocked state;

FIG. 5 is a schematic view of the double locking guide sleeve of FIG. 2 from an initial state to an unlocked state;

fig. 6 is a schematic view of a slip-down prevention mechanism of the dual locking headrest guide structure of fig. 1.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1, the double locking headrest guide structure according to one preferred embodiment of the present invention includes a headrest rod g and a double locking guide, wherein the headrest rod g is inserted into the double locking guide to be locked and engaged.

Referring to fig. 2, the double-locking guide sleeve includes a button a, a guide sleeve body b, a cap c, a first locking piece d, a transmission lever e and a second locking piece f, wherein the guide sleeve body b is a cylindrical structure with a central through hole, the first locking piece d is transversely pushed into the guide sleeve body b to be matched, the transmission lever e is rotatably and vertically installed on the guide sleeve body b and enables the upper end of the transmission lever e to be clamped into the guide sleeve body b to be transversely moved (see fig. 4), the second locking piece f is vertically installed on the guide sleeve body b and enables the lower end of the second locking piece f to act on the lower end of the transmission lever e (see fig. 5), the button a is transversely pushed into the guide sleeve body b to act on the free end of the first locking piece d and the upper end of the transmission lever e simultaneously, and the cap c is transversely installed on the guide sleeve body b to play roles of decoration and. The first locking piece d can be pushed to move in the transverse direction by acting on the free end of the first locking piece d through the button a; the button a acts on the upper end of the transmission lever e to enable the transmission lever e to transversely move, the lower end of the transmission lever e can transversely move in the opposite direction, and the lower end of the second locking piece f can be pushed to correspondingly move due to the fact that the lower end of the transmission lever e acts on the lower end of the second locking piece f.

As shown in fig. 3, two opposite sides of the headrest rod g are respectively provided with a straight groove g1 and a dovetail groove g2, and in an initial state (i.e., a locking state), the first locking piece d of the double-locking guide sleeve is clamped into the straight groove g1 to realize primary locking, and the second locking piece f of the double-locking guide sleeve is clamped into the dovetail groove g2 to realize secondary locking. The first locking piece d can be separated from the straight groove g1 and the second locking piece f can be separated from the dovetail groove g2 by external force acting on the button a, and one-key unlocking is realized.

Specifically, as shown in fig. 4, the first locking piece d includes a U-shaped body d1 and a return spring d2, and in the mounting process shown in fig. 2, the U-shaped body d1 abuts against the guide sleeve body b through the return spring d2 after passing over the central through hole of the guide sleeve body b, and in the locked state shown in fig. 3, the bottom wall of the U-shaped body d1 is caught in the straight groove g1 of the headrest rod g. As shown in fig. 5, the second locking piece f includes a vertical section f1 and a bent section f2, in the installation process shown in fig. 2, the upper end of the vertical section f1 is clamped and fixed in the corresponding clamping groove of the guide sleeve body b, the bent section f2 can move by the action force of the lower end of the transmission lever e, and in the locking state shown in fig. 3, the bottom rib of the bent section f2 is clamped into the dovetail groove g2 of the headrest rod g. With reference to fig. 4 and 5, the button a is pressed inward, the bottom wall of the U-shaped body d1 of the first locking piece d is pushed to exit from the straight groove g1, the upper end of the transmission lever e is pushed to slide inward, the rotation of the transmission lever e drives the bottom rib of the bent section f2 of the second locking piece f to exit from the dovetail groove g2, and therefore the first locking piece d and the second locking piece f are unlocked simultaneously. When the external force acting on the button a disappears, the first locking piece d has a tendency to return to the initial state by the return spring d2, and similarly, the second locking piece f also has a tendency to return to the initial state (for example, a return force provided by the material itself), that is, the first locking piece d and the second locking piece f are both locking pieces having a return mechanism.

Returning to fig. 3, in the initial state, since the size of the bottom wall of the U-shaped body d1 of the first locking piece d is equivalent to the size of the straight groove g1 of the headrest rod g, and the size of the bottom rib of the bent section f2 of the second locking piece f is significantly smaller than the opening size of the dovetail groove g2 of the headrest rod g, when the headrest rod g is stressed, the first locking piece d is stressed first, and at the same time, the second locking piece f is not stressed. When the force exceeds the strength limit of the first locking piece d, the first locking piece d fails, as shown in fig. 6, the first locking piece d exits from the straight groove g1, the headrest rod g slides downwards, and the second locking piece f starts to bear the force and simultaneously enters the upwards protruding inner part of the dovetail groove g2 to prevent sliding downwards. In this embodiment, the headrest rod g has three straight grooves g1 and three dovetail grooves g2, so that different gears can be defined, and after the headrest rod g slides down, the first locking piece d can enter a new gear again to be locked under the action of the restoring force.

The above embodiments are merely preferred embodiments of the present invention, which are not intended to limit the scope of the present invention, and various changes may be made in the above embodiments of the present invention. All simple and equivalent changes and modifications made according to the claims and the content of the specification of the present application fall within the scope of the claims of the present patent application. The invention has not been described in detail in order to avoid obscuring the invention.