Headrest guide sleeve structure and automobile seat with same

Abstract

The utility model discloses a headrest guide sleeve structure and an automobile seat with the headrest guide sleeve structure, and the headrest guide sleeve structure comprises a guide sleeve which is in the shape of a tube extending up and down; the headrest rod extends up and down and is movably arranged on the inner side of the guide sleeve in the up-down direction; the rolling set is arranged between the guide sleeve and the headrest rod and comprises a plurality of rolling pieces arranged in the circumferential direction of the headrest rod at intervals, and the headrest rod is in sliding fit with the guide sleeve through the rolling pieces; the locking device is arranged on the guide sleeve, the locking device has a locking state and an unlocking state, in the locking state, the locking device locks the headrest rod so that the headrest rod and the guide sleeve can be relatively fixed, in the unlocking state, the locking device unlocks the headrest rod, and the headrest rod can slide up and down relative to the guide sleeve. According to the headrest guide sleeve structure, the friction force between the headrest rod and the guide sleeve can be effectively reduced when a user adjusts the height of the headrest, so that the operation convenience of the user can be effectively improved, and the use experience of the user is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field especially is involved in a headrest guide sleeve structure and the car seat with it. BACKGROUND

[0002] The car headrest is a kind of driving comfort configuration and safety protection article, and the headrest includes adjustable, mainly refers to the headrest can be adjusted in height direction, to meet the driver of different height use.The headrest rod is adjusted by the sliding fit of car seat headrest guide sleeve and headrest rod in prior art, and then the height of headrest is adjusted.When user adjusts headrest up and down, there is the problem of big operating force and headrest rod is difficult to plug, to affect the use experience when user adjusts the height of headrest. UTILITY MODEL CONTENT

[0003] The utility model aims at at least one of the technical problems existing in prior art is solved.For this purpose, the utility model provides a headrest guide sleeve structure, the headrest guide sleeve structure can effectively reduce the friction between headrest rod and guide sleeve when user adjusts the height of headrest, to effectively improve the convenience of user operation, and then effectively improve the use experience of user.

[0004] The utility model further provides a car seat with the above-mentioned headrest guide sleeve structure.

[0005] According to the headrest guide sleeve structure of the utility model first aspect, the headrest guide sleeve structure includes: guide sleeve, the guide sleeve is the tubular that extends up and down;Headrest rod, the headrest rod extends up and down, and is movably arranged on the inside of the guide sleeve along up and down direction;Rolling group, the rolling group is arranged between the guide sleeve and the headrest rod, and includes multiple rolling members that are arranged at intervals along the circumference of the headrest rod, the headrest rod is slidably fitted with the guide sleeve through multiple rolling members;Locking device, the locking device is arranged on the guide sleeve, the locking device has locking state and unlocking state, in the locking state, the locking device locks the headrest rod, to make the headrest rod and the guide sleeve relative fixed, in the unlocking state, the locking device unlocks the headrest rod, and the headrest rod can slide up and down relative to the guide sleeve.

[0006] According to the headrest guide sleeve structure of the utility model, through setting guide sleeve, headrest rod, rolling group and lock in the headrest guide sleeve structure, the guide sleeve is tubular extending up and down, the headrest rod extends up and down and is movably arranged in the inside of the guide sleeve along the up and down direction, the rolling group is arranged between the guide sleeve and the headrest rod and includes multiple rolling pieces arranged along the circumference of the headrest rod, the headrest rod is slidably matched with the guide sleeve through the multiple rolling pieces, the lock is arranged on the guide sleeve, the lock has a locking state and an unlocking state, in the locking state, the lock locks the headrest rod to relatively fix the headrest rod and the guide sleeve, in the unlocking state, the lock unlocks the headrest rod, the headrest rod can slide up and down relative to the guide sleeve, can effectively reduce the friction between the headrest rod and the guide sleeve when the user adjusts the height of the headrest, thereby can effectively improve the convenience of user operation, and further effectively improve the use experience of the user.

[0007] In some embodiments, the number of the rolling groups is multiple, and the multiple rolling groups are arranged in the axial direction of the guide sleeve.

[0008] In some embodiments, a first groove is formed on the inner circumferential surface of the guide sleeve, the rolling piece is arranged in the first groove and is adapted to contact the headrest rod.

[0009] In some embodiments, the number of the first grooves is multiple, and the multiple first grooves are arranged in the circumferential direction of the guide sleeve and correspond to the multiple rolling pieces of the rolling group one by one.

[0010] In some embodiments, in the direction from the outside to the inside in the radial direction of the guide sleeve, the lower side wall of the first groove extends downwardly and obliquely, and the rolling piece is rollably supported on the lower side wall of the first groove in the radial direction of the guide sleeve.

[0011] In some embodiments, a second groove is formed on the outer circumferential surface of the headrest rod, the first groove and the second groove are opposite in the radial direction of the guide sleeve when the lock is in the locking state, and a part of the rolling piece is located in the first groove and another part of the rolling piece extends into the second groove.

[0012] In some embodiments, in the direction from the inside to the outside in the radial direction of the headrest rod, the lower side wall of the second groove extends downwardly and obliquely, and the upper side wall of the second groove is a plane perpendicular to the axial direction of the headrest rod.

[0013] In some embodiments, the number of the second grooves is multiple, the multiple second grooves are arranged in the axial direction of the headrest rod, a locking hole is formed on the headrest rod, the locking hole is arranged above the multiple second grooves, the lock includes a locking piece, and the locking piece is configured to be lockingly matched with the locking hole or any one of the second grooves to lock the headrest rod.

[0014] In some embodiments, the rolling member is a ball, and the ball is a piece of elastic material; and / or, the headrest guide sleeve structure further comprises: a backrest framework guide pipe, which is sleeved outside the guide sleeve and fixedly connected with the guide sleeve.

[0015] The automobile seat according to the second aspect of the present application comprises the headrest guide sleeve structure according to the first aspect of the present application.

[0016] According to the automobile seat of the second aspect of the present application, by arranging the headrest guide sleeve structure of the first aspect, the friction between the headrest rod and the guide sleeve can be effectively reduced when the user adjusts the height of the headrest, so that the convenience of user operation can be effectively improved, and the use experience of the user can be effectively improved.

[0017] Additional aspects and advantages of the present application will be given in part in the following description, and will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic view of the headrest guide sleeve structure according to an embodiment of the present application, wherein the lock is in a locked state;

[0019] Figure 2 is a schematic view of a rolling member according to an embodiment of the present application;

[0020] Figure 3 is a schematic view of the headrest guide sleeve structure according to an embodiment of the present application, wherein the lock is in an unlocked state;

[0021] Figure 4 is a schematic view of a second groove according to an embodiment of the present application.

[0022] REFERENCE NUMERALS:

[0023] 100, headrest guide sleeve structure;

[0024] 10, guide sleeve; 101, first groove; 1011, first side wall;

[0025] 20, headrest rod; 201, second groove; 2011, second side wall; 2012, third side wall; 2013, fourth side wall;

[0026] 30, rolling group; 31, rolling member;

[0027] 41, locking member; 411, locking piece; 42, button;

[0028] 50, backrest framework guide pipe. DETAILED DESCRIPTION

[0029] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0030] Reference is made below to Figures 1-4 The headrest guide sleeve structure 100 according to the first aspect of the present application is described.

[0031] As shown in Figures 1-4 The headrest guide sleeve structure 100 according to the first aspect of the present application includes a guide sleeve 10, a headrest rod 20, a rolling set 30, and a lock.

[0032] The guide sleeve 10 is a tube extending upward and downward; the headrest rod 20 extends upward and downward and is movably arranged on the inner side of the guide sleeve 10 in the upward and downward direction; the rolling set 30 is arranged between the guide sleeve 10 and the headrest rod 20 and includes a plurality of rolling members 31 arranged at intervals along the circumference of the headrest rod 20, and the headrest rod 20 is in sliding fit with the guide sleeve 10 through the plurality of rolling members 31; the lock is arranged on the guide sleeve 10, and the lock has a locked state and an unlocked state, in the locked state, the lock locks the headrest rod 20 to fix the headrest rod 20 relative to the guide sleeve 10, and in the unlocked state, the lock unlocks the headrest rod 20, and the headrest rod 20 can slide upward and downward relative to the guide sleeve 10.

[0033] For example Figure 1 and Figure 3 The guide sleeve 10 can be an injection molded part, and further, the material of the guide sleeve 10 can be polycarbonate (PC) having good mechanical strength or polypropylene (PP) having good chemical resistance, thereby not only effectively simplifying the processing steps and reducing the weight of the guide sleeve 10, but also effectively improving the durability of the guide sleeve 10, and further effectively improving the service life of the guide sleeve 10. In addition, the guide sleeve 10 can serve as a guide device for the headrest rod 20, thereby ensuring that the headrest rod 20 can move smoothly along a straight line.

[0034] In one specific example, as shown in Figure 1 and Figure 3 The headrest rod 20 is a circular tube extending upward and downward, and further, the nominal diameter of the headrest rod 20 is 14 mm, and the material of the headrest rod 20 is Q235 steel, it should be noted that Q235 steel has moderate strength and toughness, can withstand certain tensile, compression and bending load, and Q235 steel is easy to be welded, cut and bent, etc. processing, thereby the headrest rod 20 made of Q235 steel can effectively improve the structural strength of the headrest rod 20 and effectively reduce the processing difficulty of the headrest rod 20.

[0035] For example, the number of the rolling members 31 can be two, three, four, five, six or more, and the rolling members 31 are arranged at intervals along the circumference of the headrest rod 20, one end of the rolling member 31 is in contact with the guide sleeve 10, and the other end of the rolling member 31 is in contact with the headrest rod 20. Each rolling member 31 can effectively reduce the contact area between the guide sleeve 10 and the headrest rod 20, thereby effectively reducing the friction between the guide sleeve 10 and the headrest rod 20, and further enabling the headrest rod 20 to move up and down more smoothly. Further, the plurality of rolling members 31 can be uniformly arranged at intervals along the circumference of the guide sleeve 10, which can ensure that the headrest rod 20 is uniformly stressed, thereby effectively improving the stability of the headrest rod 20 when moving.

[0036] For example Figure 1 and Figure 3 As shown in the figure, the lock is arranged at the top end of the guide sleeve 10, and further, the lock is detachably connected with the guide sleeve 10, which can facilitate the disassembly and installation of the lock, thereby effectively improving the convenience of maintaining the lock. When the user moves the headrest rod 20 to the appropriate position, the lock can be adjusted to be in the locked state, which can effectively fix the headrest rod 20 and avoid relative movement between the headrest rod 20 and the guide sleeve 10, thereby effectively fixing the headrest position. When the user needs to move the headrest rod 20, the lock can be adjusted to be in the unlocked state, which can move the headrest rod 20, thereby allowing the user to freely adjust the height of the headrest.

[0037] In this embodiment, when the user needs to lock the height position of the headrest, the lock is adjusted to be in the locked state, which can effectively lock the height position of the headrest rod 20 and avoid accidental movement of the headrest rod 20, thereby effectively improving the stability and reliability. When the user needs to adjust the height position of the headrest, the lock is adjusted to be in the unlocked state, which enables the user to move the headrest rod 20. Since the rolling group 30 is arranged between the guide sleeve 10 and the headrest rod 20, the friction between the guide sleeve 10 and the headrest rod 20 is greatly reduced, so the user can easily move the headrest rod 20, thereby effectively reducing the operation force of the user moving the headrest rod 20.

[0038] According to the headrest guide sleeve structure 100, the guide sleeve 10 is a pipe extending upwards and downwards, the headrest rod 20 extends upwards and downwards and is movably arranged on the inner side of the guide sleeve 10 in the upwards and downwards direction, the rolling group 30 is arranged between the guide sleeve 10 and the headrest rod 20 and comprises a plurality of rolling members 31 arranged in the circumferential direction of the headrest rod 20, the headrest rod 20 is in sliding fit with the guide sleeve 10 through the plurality of rolling members 31, the lock is arranged on the guide sleeve 10, the lock has a locking state and an unlocking state, in the locking state, the lock locks the headrest rod 20, so that the headrest rod 20 is relatively fixed with the guide sleeve 10, in the unlocking state, the lock unlocks the headrest rod 20, and the headrest rod 20 can slide upwards and downwards relative to the guide sleeve 10, which can effectively reduce the friction between the headrest rod 20 and the guide sleeve 10 when the user adjusts the height of the headrest, thereby effectively improving the convenience of user operation, and further effectively improving the use experience of the user.

[0039] In an embodiment of the present application, as shown in Figure 1 and Figure 3 , the number of rolling groups 30 is multiple, and the multiple rolling groups 30 are arranged in the axial direction of the guide sleeve 10. For example, the number of rolling groups 30 can be two, three, four, five or more than six, and further, the multiple rolling groups 30 can be uniformly and evenly arranged in the upwards and downwards direction, and the multiple rolling members 31 in each rolling group 30 are uniformly and evenly arranged in the circumferential direction of the guide sleeve 10.

[0040] In a specific example, as shown in Figure 1 and Figure 3 , the number of rolling groups 30 is three, the multiple rolling groups 30 can be uniformly and evenly arranged in the upwards and downwards direction, each rolling group 30 contains two rolling members 31, and the two rolling members 31 in each rolling group 30 are symmetrically arranged between the guide sleeve 10 and the headrest rod 20.

[0041] The number of rolling groups 30 is multiple, and the multiple rolling groups 30 are arranged in the axial direction of the guide sleeve 10, which can more evenly disperse the force acting on the guide sleeve 10, the headrest rod 20 and the rolling group 30, avoid stress concentration, reduce local wear, and thus effectively improve the stability and durability of the headrest guide sleeve structure 100. In addition, the multiple rolling groups 30 arranged in the axial direction of the guide sleeve 10 can further reduce the friction between the guide sleeve 10 and the headrest rod 20, and effectively reduce the noise and vibration when the headrest rod 20 moves, thereby further improving the convenience and comfort.

[0042] In an embodiment of the present application, as shown in Figure 3 and Figure 4As shown in the figure, the inner circumferential surface of the guide sleeve 10 is formed with a first groove 101, and the rolling member 31 is arranged in the first groove 101 and adapted to contact the headrest rod 20. Figure 3 and Figure 4 As shown in the figure, one side of the rolling member 31 in the first groove 101 contacts the outer circumferential surface of the headrest rod 20 in the left-right direction, the other side of the rolling member 31 in the first groove 101 contacts the inner circumferential surface of the guide sleeve 10 in the left-right direction, and the rolling member 31 as a whole supports the first groove 101.

[0043] When the user adjusts the lock to be in the unlocked state, the user can move the headrest rod 20 as needed, and when the user moves the headrest rod 20, the movement of the headrest rod 20 relative to the guide sleeve 10 in the up-down direction can drive the rolling member 31 to roll in the first groove 101, and the rolling of the plurality of rolling members 31 in the first groove 101 can effectively reduce the friction between the guide sleeve 10 and the headrest rod 20, thereby effectively reducing the operation difficulty of the user moving the headrest rod 20.

[0044] The embodiment can quickly position and install the rolling member 31 in the first groove 101, effectively improve the convenience of assembling the rolling member 31, and provide effective support and fixation for the rolling member 31, thereby helping to maintain the stability of the rolling member 31 and effectively improving the reliability of the rolling member 31.

[0045] In one embodiment of the utility model, as shown in the figure, Figure 1 and Figure 3 As shown in the figure, the number of the first grooves 101 is multiple, and the multiple first grooves 101 are arranged along the circumference of the guide sleeve 10 and correspond to the multiple rolling members 31 of the rolling group 30 one by one. That is to say, each rolling member 31 is placed in an independent first groove 101, so as to ensure that each rolling member 31 can be accurately positioned in the guide sleeve 10, thereby effectively improving the installation accuracy of the rolling member 31.

[0046] In addition, the multiple first grooves 101 are arranged along the circumference of the guide sleeve 10, that is, the multiple rolling members 31 are uniformly supported in the multiple first grooves 101 of the guide sleeve 10, so as to ensure the uniformity of the stress on the inner circumferential surface of the guide sleeve 10, thereby effectively avoiding the wear or deformation of the inner circumferential surface of the guide sleeve 10 due to excessive local pressure, and thereby effectively improving the service life of the guide sleeve 10.

[0047] By setting the number of the first grooves 101 as multiple, and multiple first grooves 101 are arranged along the circumferential direction of the guide sleeve 10 and correspond to multiple rolling members 31 of the rolling set 30 one by one, not only the installation precision of the rolling member 31 can be effectively improved, so as to effectively ensure the reliability when the rolling member 31 rolls, but also the inner circumferential surface of the guide sleeve 10 can be uniformly stressed, so as to effectively improve the service life of the guide sleeve 10.

[0048] In an embodiment of the utility model, as shown in Figure 3 and Figure 4 In the direction from outside to inside along the radial direction of the guide sleeve 10, the lower side wall of the first groove 101 extends downwardly and the rolling member 31 is rollably supported on the lower side wall of the first groove 101 in the radial direction of the guide sleeve 10. Figure 3 and Figure 4 As shown in, the first groove 101 comprises a first side wall 1011, which is the lower side wall of the first groove 101. Further, the included angle between the direction in which the first side wall 1011 extends obliquely and the vertical direction is greater than or equal to 30° and less than or equal to 60°, for example, the included angle between the direction in which the first side wall 1011 extends obliquely and the vertical direction can be 30°, 35°, 40°, 45°, 50°, 55° or 60°.

[0049] When the user adjusts the position of the headrest rod 20 in the up-down direction, the rolling member 31 can always have a tendency to roll along the first side wall 1011 towards the outer circumferential surface of the headrest rod 20 under the action of gravity, so as to ensure that the rolling member 31 and the outer circumferential surface of the headrest rod 20 are always in rolling contact, avoiding the rolling member 31 and the outer circumferential surface of the headrest rod 20 from being separated, thereby effectively improving the stability when the headrest rod 20 is moved.

[0050] In the direction from outside to inside along the radial direction of the guide sleeve 10, by setting the lower side wall of the first groove 101 to extend downwardly, the rolling member 31 is rollably supported on the lower side wall of the first groove 101 in the radial direction of the guide sleeve 10, which can effectively ensure that the rolling member 31 and the outer circumferential surface of the headrest rod 20 are always in rolling contact, thereby effectively improving the stability when the headrest rod 20 is moved.

[0051] In an embodiment of the utility model, as shown in Figure 1 and Figure 2 The outer circumferential surface of the headrest rod 20 is provided with a second groove 201, and in the locking state of the lock, the first groove 101 and the second groove 201 are opposite to each other in the radial direction of the guide sleeve 10, and a part of the rolling member 31 is located in the first groove 101 and another part extends into the second groove 201.

[0052] When the lock is in the locked state, the plurality of rolling members 31 can form a fixing effect on the headrest rod 20 in the horizontal plane, specifically, the force of each rolling member 31 on the headrest rod 20 is an obliquely upward force, and the component of the force of the plurality of rolling members 31 on the headrest rod 20 in the horizontal plane is directed to the axial direction of the headrest rod 20, that is, the components of the force of the plurality of rolling members 31 on the headrest rod 20 in the horizontal plane can jointly act to fix the position of the headrest rod 20 in the horizontal plane, so as to avoid the headrest rod 20 from shaking in the horizontal plane.

[0053] The second groove 201 is arranged on the outer circumferential surface of the headrest rod 20, and the first groove 101 and the second groove 201 are opposite in the radial direction of the guide sleeve 10 when the lock is in the locked state, and a part of the rolling member 31 is located in the first groove 101 and another part extends into the second groove 201, so that the position of the headrest rod 20 can be effectively fixed, the shaking of the headrest rod 20 is avoided, and the stability and reliability of the headrest rod 20 are effectively improved.

[0054] In one embodiment of the utility model, as shown in Figure 3 and Figure 4 in the radial direction of the headrest rod 20 from inside to outside, the lower side wall of the second groove 201 extends downwardly and obliquely; the upper side wall of the second groove 201 is a plane perpendicular to the axial direction of the headrest rod 20. For example Figure 3 and Figure 4 the second groove 201 comprises a second side wall 2011 and a third side wall 2012, the second side wall 2011 is the lower side wall of the second groove 201, and the third side wall 2012 is the upper side wall of the second groove 201.

[0055] When the lock is changed from the locked state to the unlocked state and the headrest rod 20 moves upwardly, the rolling member 31 falls into the second groove 201 and is in rolling contact with the second side wall 2011 under the action of gravity, and since the headrest rod 20 gradually moves upwardly, the second side wall 2011 also gradually moves upwardly, and the rolling member 31 gradually moves upwardly and outwardly in the radial direction of the headrest rod 20 under the action of the second side wall 2011, and finally moves out of the second groove 201 and is in rolling contact with the outer circumferential surface of the headrest rod 20.

[0056] When the lock is in the locked state, a part of the rolling member 31 is located in the first groove 101 and another part extends into the second groove 201, and since the third side wall 2012 of the second groove 201 is a plane perpendicular to the axial direction of the headrest rod 20, the movement of the rolling member 31 in the vertical direction can be limited, so that the rolling member 31 cannot be popped upwardly when the lock is in the locked state, and the reliability of the lock in the locked state is effectively improved.

[0057] The embodiment can effectively improve the convenience of user operation by extending the lower side wall of the second groove 201 downward in the direction from inside to outside in the radial direction of the headrest rod 20, so that the rolling piece 31 can automatically move out of the second groove 201 when the headrest rod 20 moves upward, and can effectively improve the reliability of the locking device in the locked state by arranging the upper side wall of the second groove 201 to be perpendicular to the axial plane of the headrest rod 20, so that the upper side wall of the second groove 201 can effectively limit the movement of the rolling piece 31 when the locking device is in the locked state.

[0058] In one embodiment of the utility model, as shown in Figures 1-4 The number of the second grooves 201 is multiple, the multiple second grooves 201 are arranged at intervals along the axial direction of the headrest rod 20, the locking hole is formed on the headrest rod 20, the locking hole is arranged on the upper side of the multiple second grooves 201, and the locking device comprises a locking piece 41, which is configured to be locked and matched with the locking hole or any one of the second grooves 201 to lock the headrest rod 20.

[0059] For example, the number of the second grooves 201 can be four, five, six, seven or more than eight. Figure 1 And Figure 3 As shown in the drawings, the multiple second grooves 201 are arranged at intervals in the up-down direction, that is, the headrest rod 20 can be locked at different height positions, so that the user can adjust and lock the headrest rod 20 according to different needs, thereby effectively increasing the flexibility and applicability of the headrest guide sleeve structure 100.

[0060] In one specific example, as shown in Figure 1 And Figure 3 The locking device further comprises a connecting mechanism, a reset mechanism and a button 42, one end of the connecting mechanism is connected with the button 42, the other end of the connecting mechanism is connected with the locking piece 41, one end of the reset mechanism is connected with the button 42, and the other end of the reset mechanism is connected with the locking piece 41. Further, the locking piece 41 comprises a locking sheet 411, which can be a metal sheet, thereby effectively improving the structural strength of the locking sheet 411, and effectively prolonging the service life of the locking piece 41. The reset mechanism can adopt a spring, and further, the spring can be a compression spring, thereby effectively simplifying the structure of the reset mechanism, and further effectively reducing the cost of the locking device.

[0061] In one specific example, as shown in Figures 1-4As shown, the fourth side wall 2013 is a plane parallel to the axial direction of the headrest rod 20, the upper end of the fourth side wall 2013 is connected with the third side wall 2012, and the lower end of the fourth side wall 2013 is connected with the second side wall 2011. In a specific example, the locking piece 411 is a rectangular metal sheet, and the height of the metal sheet in the up-down direction is equal to the length of the fourth side wall 2013 in the up-down direction. When the locking device is in the locking state and the locking piece 411 of the locking member 41 is located in any one of the second grooves 201, the locking piece 411 can cooperate with the second groove 201 to lock the headrest rod 20.

[0062] When the locking device is in the locking state, the locking piece 411 of the locking member 41 is located in the locking hole or any one of the second grooves 201, so that the position of the headrest rod 20 can be locked to prevent the movement of the headrest rod 20. At this time, the user presses the button 42, and the button 42 moves to drive the connecting mechanism to move, and the connecting mechanism drives the locking member 41 to move, so that the locking piece 411 of the locking member 41 can move out of the locking hole or any one of the second grooves 201, and then the user can easily move the headrest rod 20 to the appropriate position.

[0063] When the user needs to lock the position of the headrest rod 20, any one of the second grooves 201 on the headrest rod 20 can be moved to a position opposite to the first groove 101 in the radial direction of the guide sleeve 10, and then the locking piece 411 of the locking member 41 enters the locking hole or any one of the second grooves 201 under the action of the reset mechanism, so that the headrest rod 20 can be effectively fixed.

[0064] The number of the second grooves 201 is set to be multiple, and the multiple second grooves 201 are arranged at intervals along the axial direction of the headrest rod 20, so that the user can adjust and lock the headrest rod 20 according to different needs, thereby effectively increasing the flexibility and applicability of the headrest guide sleeve structure 100. The locking hole is arranged on the headrest rod 20, the locking hole is arranged on the upper side of the multiple second grooves 201, the locking device includes the locking member 41, the locking member 41 is configured to be locked and cooperated with the locking hole or any one of the second grooves 201 to lock the headrest rod 20, and the operation process of the locking device can be effectively simplified, so that the user can conveniently lock or unlock the headrest rod 20, thereby effectively improving the efficiency of locking or unlocking the headrest rod 20.

[0065] In an embodiment of the utility model, as shown in Figures 1-4 The rolling member 31 is a ball, and the ball is a piece of elastic material; and / or, the headrest guide sleeve structure 100 further includes a backrest framework guide pipe 50, which is sleeved on the outside of the guide sleeve 10 and fixedly connected with the guide sleeve 10.

[0066] For example, the rolling member 31 is a ball, and the ball is a piece of elastic material; for another example, the headrest guide sleeve structure 100 further comprises a backrest framework guide pipe 50, the backrest framework guide pipe 50 is sleeved outside the guide sleeve 10 and fixedly connected with the guide sleeve 10; for another example, the rolling member 31 is a ball, and the ball is a piece of elastic material, and the headrest guide sleeve structure 100 further comprises a backrest framework guide pipe 50, the backrest framework guide pipe 50 is sleeved outside the guide sleeve 10 and fixedly connected with the guide sleeve 10.

[0067] Further, the diameter of the ball is less than or equal to 2 mm, for example, the diameter of the ball can be 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm and 2 mm, thereby enabling the ball to be used in a more compact design, thereby being suitable for limited space, while the small size of the ball can still provide a low-friction rolling effect, enabling the headrest rod 20 to slide smoothly and stably in the guide sleeve 10.

[0068] For example, the material of the ball can be polyurethane, it should be noted that polyurethane is a kind of elastic material, and the ball made of polyurethane material has good flexibility and resilience, so that the ball made of polyurethane material can help to absorb and buffer vibration, thereby effectively avoiding the jamming and noise of the ball. In addition, the ball made of polyurethane material can provide a lower friction coefficient when in contact with the guide sleeve 10 and the headrest rod 20, thereby enabling the headrest rod 20 to slide more smoothly in the guide sleeve 10.

[0069] For another example, the material of the ball can be nylon, it should be noted that the ball made of nylon material has good wear resistance, can maintain good performance in long-term use, reduce wear, and the ball made of nylon material has good mechanical strength and toughness, can withstand a larger load, thereby effectively improving the service life of the ball.

[0070] The embodiment sets the rolling member 31 as a ball, and the ball is a piece of elastic material, which not only effectively simplifies the structure of the elastic member, thereby effectively reducing the processing difficulty of the elastic member and saving cost, but also effectively reduces the noise and vibration when moving the headrest rod 20, thereby effectively improving the user's experience; by providing the backrest framework guide pipe 50 in the headrest guide sleeve structure 100, the backrest framework guide pipe 50 is sleeved outside the guide sleeve 10 and fixedly connected with the guide sleeve 10, which can provide additional support and protection for the headrest guide sleeve structure 100, thereby effectively increasing the structural strength and reliability of the headrest guide sleeve structure 100.

[0071] According to the second aspect of the utility model, the headrest guide sleeve structure 100 of the first aspect of the utility model is arranged on the top of the automobile seat, and the number of the headrest guide sleeve structure 100 is two, and the two headrest guide sleeve structures 100 are arranged at intervals along the left-right direction of the automobile.

[0072] When the user needs to adjust the height of the headrest, the lock is adjusted to be in the unlocked state, and then the user can easily move the headrest to the appropriate position along the up-down direction.

[0073] According to the automobile seat of the utility model, the headrest guide sleeve structure 100 of the first aspect of the utility model is arranged, the friction between the headrest rod 20 and the guide sleeve 10 can be effectively reduced when the user adjusts the height of the headrest, the convenience of user operation can be effectively improved, and the use experience of the user can be effectively improved.

[0074] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, structure and operation, therefore, it cannot be understood as a limitation of the utility model.

[0075] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0076] In the utility model, unless another definite provision and limitation, the term " install " " link " " connect " " fixed " and so on term should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection, also can be communication;Can be direct connection, also can pass through intermediate medium indirectly connect, can be two element internal communication or two element's mutual action relationship. For ordinary skilled person in the art, can understand the concrete meaning of above-mentioned term in the utility model according to specific circumstances.

[0077] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0078] Although the embodiments of the present utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A headrest guide sleeve structure, characterized by, The headrest guide sleeve structure comprises: a guide sleeve extending upward and downward in a tubular shape; a headrest rod extending upward and downward and movably arranged inside the guide sleeve in the upward and downward direction; a rolling group arranged between the guide sleeve and the headrest rod and comprising a plurality of rolling members arranged in a circumferential direction of the headrest rod, the headrest rod being in sliding fit with the guide sleeve through the plurality of rolling members; a lock arranged on the guide sleeve, the lock having a locked state and an unlocked state, in the locked state, the lock locks the headrest rod so that the headrest rod is relatively fixed with the guide sleeve, in the unlocked state, the lock unlocks the headrest rod, and the headrest rod can slide upward and downward relative to the guide sleeve.

2. The headrest guide structure according to claim 1, wherein The number of the rolling groups is a plurality, and the plurality of rolling groups are arranged in an axial direction of the guide sleeve.

3. The headrest guide structure according to claim 2, wherein A first groove is formed on an inner circumferential surface of the guide sleeve, and the rolling member is arranged in the first groove and adapted to be in contact with the headrest rod.

4. The headrest guide structure according to claim 3, wherein The number of the first grooves is a plurality, and the plurality of first grooves are arranged in a circumferential direction of the guide sleeve and correspond to the plurality of rolling members of the rolling group one by one.

5. The headrest guide structure according to claim 3, wherein In a direction from outside to inside in a radial direction of the guide sleeve, a lower side wall of the first groove extends downward and obliquely, and the rolling member is rollably supported on the lower side wall of the first groove in the radial direction of the guide sleeve.

6. The headrest guide structure according to claim 5, wherein A second groove is arranged on an outer circumferential surface of the headrest rod, the first groove and the second groove are opposite to each other in the radial direction of the guide sleeve when the lock is in the locked state, and a part of the rolling member is located in the first groove and another part of the rolling member extends into the second groove.

7. The headrest guide structure according to claim 6, wherein In a direction from inside to outside in a radial direction of the headrest rod, a lower side wall of the second groove extends downward and obliquely; An upper side wall of the second groove is a plane perpendicular to an axial direction of the headrest rod.

8. The headrest guide structure according to claim 6, wherein The number of the second grooves is a plurality, and the plurality of second grooves are arranged in an axial direction of the headrest rod, A locking hole is formed on the headrest rod and arranged above the upper side of the plurality of second grooves, The lock comprises a locking member configured to be in locking fit with the locking hole or any one of the second grooves to lock the headrest rod.

9. The headrest guide structure according to any one of claims 1-8, wherein The rolling member is a rolling ball, and the rolling ball is a piece of elastic material. And / or, The headrest guide sleeve structure further comprises a backrest framework guide pipe sleeved outside the guide sleeve and fixedly connected with the guide sleeve.

10. An automotive seat characterized by comprising: The headrest guide sleeve structure comprises any one of claims 1-9.

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