Headrest capable of being adjusted in four directions

Abstract

The utility model discloses a headrest capable of being adjusted in four directions, and relates to the technical field of automobiles. The four-direction adjusting headrest comprises a sliding block, a base, an inserting rod, a first driving piece and a second driving piece, the sliding block is arranged on the base in a sliding mode, and the base is arranged on the inserting rod in a sliding mode; the first driving piece is arranged on the inserting rod or the base and used for driving the base to move in the first direction along the inserting rod; the second driving piece is arranged on the base or the sliding block and used for driving the sliding block to move in the second direction relative to the base, and the first direction is perpendicular to the second direction. The headrest capable of being adjusted in four directions has the advantages of being simpler and more compact in structure and better in stability.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile, specifically, four -way adjusting headrest. BACKGROUND

[0002] At present, some car seats on the market are provided with four -way adjustable headrests, which can realize automatic adjustment of height position and front and back position.

[0003] Such headrests usually include a support main body connected with a plug rod, a front and back slider provided on the support main body, and a lifting slider provided on the front and back slider. In actual application, the front and back slider drives the lifting slider to slide in the front and back direction relative to the support main body under the drive of a front and back motor; the lifting slider drives the headrest shell to lift under the drive of a lifting motor.

[0004] Such headrest structure is complex, occupies a large space in the front and back direction, and because the front and back slider forms a long cantilever structure relative to the support main body, and the weight of the lifting slider and the headrest shell is all applied to the front and back slider, the stress condition is bad, which leads to unstable overall structure and easy to have adjustment jamming problem after long time use. SUMMARY

[0005] The utility model aims at providing a four -way adjustable headrest which has the characteristics of simpler and more compact structure and better stability.

[0006] The embodiment of the utility model provides a technical scheme:

[0007] A four -way adjustable headrest, including sliding block, base, plug rod, first drive part and second drive part, the sliding block is slidably arranged on the base, the base is slidably arranged on the plug rod,

[0008] The first drive part is arranged on the plug rod or the base and is used for driving the base to move in the first direction along the plug rod;The second drive part is arranged on the base or the sliding block and is used for driving the sliding block to move in the second direction relative to the base, and the first direction is perpendicular to the second direction.

[0009] In an optional implementation, one end of the plug rod is provided with a fixing part, the first drive part is arranged on the fixing part, and the output end of the first drive part is connected with the base, or,

[0010] The first drive part is arranged on the base, and the output end of the first drive part is connected with the fixing part.

[0011] In an optional embodiment, the first driving member is arranged on the base, and an output end of the first driving member is provided with a first screw rod extending in the first direction;

[0012] The four-way adjustable headrest further comprises a first nut, which is connected with the fixing member and threadedly cooperates with the first screw rod;

[0013] The first driving member is configured to drive the first screw rod to rotate, thereby driving the first nut to move along the first screw rod.

[0014] In an optional embodiment, a side of the base corresponding to the fixing member is provided with a clearance cavity for embedding the fixing member.

[0015] In an optional embodiment, the fixing member is provided with a positioning groove, and an outer sidewall of the first nut is annularly provided with a cooperating groove, and opposite groove sidewalls of the positioning groove are embedded into the cooperating groove to position the first nut.

[0016] In an optional embodiment, the fixing member is further provided with a mounting hole, and a hole diameter of the mounting hole is greater than a width of the positioning groove; and the mounting hole is in communication with one end of the positioning groove.

[0017] In an optional embodiment, the fixing member is further provided with an anti-extraction groove, and the first nut is provided with an elastic hook embedded into the anti-extraction groove.

[0018] In an optional embodiment, the elastic hook comprises a rod portion extending outward from the sidewall of the first nut and a hook portion at a distal end of the rod portion, and the hook portion abuts against a sidewall of the anti-extraction groove to limit the first nut from sliding in a direction of exiting the positioning groove.

[0019] In an optional embodiment, the second driving member is arranged on the sliding block, and an output end of the second driving member is provided with a second screw rod extending in the second direction;

[0020] The four-way adjustable headrest further comprises a second nut, which is connected with the base and threadedly cooperates with the second screw rod;

[0021] The second driving member is configured to drive the second screw rod to rotate, thereby driving the second nut to move along the second screw rod.

[0022] In an optional embodiment, a side of the base in the first direction is recessed with a mounting groove, and the second nut is inserted into the mounting groove.

[0023] In an optional embodiment, one of the base and the sliding block is provided with a guide sliding groove extending in the second direction.

[0024] The other one of the two has a guide sliding part which extends into the guide sliding groove and is in sliding fit with the guide sliding groove.

[0025] In an optional embodiment, the four-way adjustable headrest further comprises elastic tensioning members, the guide sliding groove is provided with the elastic tensioning members on the two opposite groove sidewalls in the first direction, and the elastic tensioning members abut against the guide sliding part.

[0026] In an optional embodiment, the first driving member and the second driving member at least partially coincide in the first direction when the sliding block moves to the limit position close to the base in the second direction.

[0027] In an optional embodiment, one of the base and the insertion rod has a limiting groove which extends in the first direction and is at least one end closed;

[0028] The other one is provided with a limiting member which extends into the limiting groove and is in sliding fit with the limiting groove.

[0029] In an optional embodiment, the four-way adjustable headrest further comprises a sliding bushing which is detachably connected with the base and is slidably sleeved on the outer sidewall of the insertion rod.

[0030] Compared with the prior art, the four-way adjustable headrest provided by the utility model has the advantages that the base is directly and slidably arranged on the insertion rod, the sliding block is slidably arranged on the base, the base moves along the insertion rod in the first direction under the driving of the first driving member, and the sliding block moves relative to the base in the second direction under the driving of the second driving member. In actual application, the first direction is the height direction, and the second direction is the front-back direction. The sliding block is used for mounting the headrest shell, thereby realizing the adjustment of the height position and the front-back position of the headrest shell. It can be seen that the four-way adjustable headrest eliminates the support main body fixedly connected with the insertion rod, the base which can move up and down directly cooperates with the insertion rod, avoids the excessive weight from being concentrated on the sliding block of the cantilever structure, optimizes the stress condition, and reduces the occupied space in the front-back direction. Therefore, the four-way adjustable headrest provided by the utility model has the advantages of simple and compact structure and better stability. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation on the scope. For ordinary skilled in the art, other related drawings can also be obtained according to these drawings without paying creative labor.

[0032] Figure 1 An exploded view of a four-way adjustable headrest provided for an embodiment of this utility model;

[0033] Figure 2 This is a schematic diagram of the connection structure between the base and the insertion rod from one perspective.

[0034] Figure 3 for Figure 2 An exploded view of the structure shown;

[0035] Figure 4 This is a schematic diagram of the connection structure between the first nut and the fastener in one state.

[0036] Figure 5 This is a schematic diagram of the connection structure between the first nut and the fastener in another state.

[0037] Figure 6 for Figure 5 An exploded view of the structure shown;

[0038] Figure 7 A schematic diagram of the connection structure of the base, sliding block and plug rod from one perspective;

[0039] Figure 8 for Figure 7 A cross-sectional view of the structure shown;

[0040] Figure 9 A schematic diagram of the connection structure of the base, sliding block and plug rod from another perspective;

[0041] Figure 10 for Figure 9 A cross-sectional view of the structure shown;

[0042] Figure 11 This is a schematic diagram of the connection structure between the base and the insertion rod from another perspective.

[0043] Figure 12 This is a cross-sectional schematic diagram of the four-way adjustable headrest when the sliding block is in the extreme position close to the base;

[0044] Figure 13 for Figure 12 Schematic diagram of the connection structure between the sliding block and the base;

[0045] Figure 14 This is a cross-sectional schematic diagram of the four-way adjustable headrest when the sliding block is in the extreme position far away from the base;

[0046] Figure 15 for Figure 14 Schematic diagram of the connection structure between the sliding block and the base;

[0047] Figure 16 is a structural schematic view of the sliding block in one perspective view;

[0048] Figure 17 is a structural schematic view of the sliding block in another perspective view;

[0049] Figure 18 is a structural schematic view of the base;

[0050] Figure 19 is a structural schematic view of the base; Figure 18 is an enlarged schematic view of area A in the middle;

[0051] Figure 20 is an exploded schematic view of the connecting structure of the second nut and the base;

[0052] Figure 21 is an enlarged schematic view of area B in the middle; Figure 20

[0053] Figure 22 is a schematic view of the connecting structure of the second driving member and the sliding block;

[0054] Figure 23 is an exploded schematic view of the structure shown in the middle; Figure 22

[0055] Icon: 100 - four-way adjustable headrest;110 - shell;111 - accommodating space;120 - sliding block;121 - sliding guide part;130 - base;131 - accommodation cavity;132 - mounting groove;133 - sliding guide groove;134 - limiting groove;140 - insertion rod;141 - limiting member;150 - first driving member;151 - first lead screw;152 - first shock pad;160 - second driving member;161 - second lead screw;162 - second shock pad;170 - fixing member;171 - positioning groove;172 - mounting hole;173 - anti-falling groove;180 - first nut;181 - matching groove;182 - elastic clasp;1821 - rod part;1822 - hook part;190 - second nut;191 - elastic tensioning member;192 - sliding bushing. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0057] ​​Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.

[0058] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0059] In the description of the utility model, it is understood that the terms "upper", "lower", "inner", "outer", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the utility model product is used, or the orientation or positional relationship commonly understood by those skilled in the art, which is only for the convenience of describing the utility model and simplifying the description, and is not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0060] In addition, the terms "first", "second" and the like are only used for differentiation description, and cannot be understood as indicating or implying relative importance.

[0061] In the description of the utility model, it is also necessary to explain that, unless otherwise explicitly specified and limited, the terms "set", "connected" and the like should be understood broadly, for example, "connected" can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0062] The specific embodiments of the utility model will be described in detail below in combination with the drawings.

[0063] Embodiment

[0064] Please refer to Figure 1 , Figure 1 As shown in the figure, it is an exploded schematic view of the four-way adjusting headrest 100 provided in the embodiment.

[0065] The four-way adjustable headrest 100 provided by the embodiment is applied to a car seat and specifically comprises a shell 110, a sliding block 120, a base 130, a plug rod 140, a first driving member 150 and a second driving member 160. The sliding block 120, the base 130, the first driving member 150 and the second driving member 160 are all arranged inside the shell 110, one end of the plug rod 140 extends into the shell 110, and the other end is used for being connected with the car seat; the base 130 is slidably arranged on the plug rod 140, and the sliding block 120 is slidably arranged on the base 130 and connected with the shell 110.

[0066] The shell 110 comprises a front cover and a rear cover which are buckled with each other, the front cover is connected with the sliding block 120, the front cover and the rear cover jointly enclose a containing space 111, and the sliding block 120, the base 130, the first driving member 150 and the second driving member 160 are all contained in the containing space 111, so that the overall structure is more compact. Moreover, the power connection terminals of the first driving member 150 and the second driving member 160 can be integrated at the end of the plug rod 140 extending out of the shell 110, so that hot plug of the four-way adjustable headrest 100 is realized in actual application.

[0067] The first driving member 150 is arranged on the base 130 and is used for driving the base 130 to move in a first direction along the plug rod 140. The second driving member 160 is arranged on the sliding block 120 and is used for driving the sliding block 120 to move in a second direction relative to the base 130, and the first direction is perpendicular to the second direction.

[0068] Actually, with the car as a reference standard, the first direction is a vertical direction, and the second direction is a front-back direction. In the process that the first driving member 150 drives the base 130 to move in the vertical direction, the base 130 drives the shell 110 to synchronously move in the vertical direction through the sliding block 120, so that the height position of the shell 110 is adjusted; in the process that the second driving member 160 drives the sliding block 120 to move in the front-back direction, the sliding block 120 drives the shell 110 to synchronously move in the front-back direction, so that the front-back position of the shell 110 is adjusted.

[0069] It can be seen that the four-way adjustable headrest 100 provided by the embodiment has the characteristics that the base 130 is directly and slidably arranged on the plug rod 140, the sliding block 120 is slidably arranged on the base 130, the fixedly arranged support body on the plug rod 140 is omitted, and excessive weight is avoided from being concentrated on the sliding block 120 of the cantilever structure, so that the stress condition of the overall structure is optimized, and the occupied space in the front-back direction is reduced. Therefore, the four-way adjustable headrest 100 provided by the utility model has the characteristics of simpler and more compact structure and better stability.

[0070] In another embodiment, the specific arrangement position of the first driving member 150 and the second driving member 160 can be adjusted according to actual application conditions. For example, the first driving member 150 can also be arranged on the insertion rod 140, and the second driving member 160 can also be arranged on the base 130.

[0071] Please refer to Figure 2 and Figure 3 , Figure 2 Fig. 4 shows a structure schematic diagram of the connection structure of the base 130 and the insertion rod 140 in one perspective view, Figure 3 Fig. 5 shows Figure 2 an exploded schematic diagram of the structure shown in Fig. 4.

[0072] In fact, in the embodiment, the insertion rod 140 is provided with a fixing member 170 at one end extending into the shell 110, and the output end of the first driving member 150 is connected with the fixing member 170. During the operation of the first driving member 150, the base 130 is driven to move along the insertion rod 140 to approach or move away from the fixing member 170, so as to adjust the height position of the shell 110.

[0073] In another embodiment, the first driving member 150 can be arranged on the fixing member 170 arranged at the end of the insertion rod 140, and the output end of the first driving member 150 is connected with the base 130. In this case, during the movement of the first driving member 150, the base 130 can also be driven to move along the insertion rod 140 to approach or move away from the fixing member 170.

[0074] As a preferred, in the embodiment, the first driving member 150 is a rotary motor, and the output end of the first driving member 150 is provided with a first screw rod 151 extending in the first direction. The four-way adjustable headrest 100 further comprises a first nut 180, which is connected with the fixing member 170 and is in threaded cooperation with the first screw rod 151. The first driving member 150 is used to drive the first screw rod 151 to rotate, so as to drive the first nut 180 to move along the first screw rod 151.

[0075] It can be understood that the first nut 180 is mounted on the fixing member 170. When the first driving member 150 drives the first screw rod 151 to rotate, the first screw rod 151 rotates relative to the first nut 180 while moving in the first direction, so as to drive the base 130 to move along the insertion rod 140 in the first direction, thereby adjusting the height position of the shell 110.

[0076] In the embodiment where the first driving member 150 is arranged on the fixing member 170, the first nut 180 can be fixed on the base 130 or integrally formed with the base 130. In other embodiments, other driving modes can be used instead of the screw-nut combination in the present embodiment. For example, the first driving member 150 can also be a linear motor, which is arranged on one of the base 130 and the fixing member 170, and the output end of the linear motor is connected with the other one of the base 130 and the fixing member 170.

[0077] The four-way adjustable headrest 100 provided in the present embodiment further comprises a first damping pad 152, which is arranged between the first driving member 150 and the base 130, and functions to isolate vibration transmission, so as to avoid the vibration of the first driving member 150 from being transmitted to the base 130 and reduce noise.

[0078] In order to smoothly accommodate the fixing member 170 in the base 130 to obtain a greater lifting stroke, in the present embodiment, a side of the base 130 corresponding to the fixing member 170 is provided with an accommodation cavity 131 for embedding the fixing member 170. That is, the top of the base 130 is provided with the accommodation cavity 131, and during the lifting movement of the base 130 along the insertion rod 140 driven by the first driving member 150, the fixing member 170 can be embedded in the accommodation cavity 131, so that the maximum lifting stroke of the base 130 is improved.

[0079] In order to eliminate the assembly error between the insertion rod 140 and the base 130, reduce the friction and ensure the smooth sliding of the base 130 on the insertion rod 140, the four-way adjustable headrest 100 provided in the present embodiment further comprises a sliding bushing 192, which is detachably connected with the base 130 and slidably sleeved on the outer sidewall of the insertion rod 140.

[0080] It can be understood that during assembly, the sliding bushing 192 is first installed on the base 130, and then the sliding bushing 192 is sleeved on the insertion rod 140 by the base 130. In the completed assembly state, the end of the insertion rod 140 extending into the housing 110 is connected with the fixing member 170 through the sliding bushing 192.

[0081] Please refer to Figure 4 , Figure 5 and Figure 6 , Figure 4 for the structure schematic diagram of the connection structure of the first nut 180 and the fixing member 170 in one state, Figure 5 for the structure schematic diagram of the connection structure of the first nut 180 and the fixing member 170 in another state, Figure 6 for the exploded schematic diagram of the structure shown in Figure 5 .

[0082] In this embodiment, in order to facilitate assembly, the first nut 180 is installed on the fixing member 170 by clamping, and the two can be repeatedly disassembled. In another embodiment, according to the actual application condition, the first nut 180 can also be connected with the fixing member 170 in other detachable manner, such as threaded connection, etc. The first nut 180 can also be fixed on the fixing member 170 by welding, etc., and can also be integrally formed with the fixing member 170.

[0083] Specifically, the fixing member 170 in this embodiment has a positioning groove 171, and the outer sidewall of the first nut 180 is annularly provided with a matching groove 181, and the two groove sidewalls of the positioning groove 171 are embedded into the matching groove 181 to position the first nut 180.

[0084] It can be understood that the two groove sidewalls of the positioning groove 171 are embedded into the matching groove 181 on the outer sidewall of the first nut 180, so as to clamp the first nut 180 and limit the movement of the first nut 180 relative to the fixing member 170 in the vertical direction.

[0085] In order to facilitate the clamping of the first nut 180 into the positioning groove 171, in this embodiment, the fixing member 170 also has a mounting hole 172, and the hole diameter of the mounting hole 172 is greater than the width of the positioning groove 171. The mounting hole 172 is in communication with one end of the positioning groove 171.

[0086] In fact, the mounting hole 172 plays a role of assisting the assembly of the first nut 180, and the area of the mounting hole 172 is also greater than the cross-sectional area of the first nut 180. When assembling, first, one end of the first nut 180 is inserted into the mounting hole 172 until the matching groove 181 annularly provided on the outer sidewall of the first nut 180 is horizontally aligned with the positioning groove 171. After alignment, an acting force is applied to drive the first nut 180 to slide horizontally into the positioning groove 171, and in this process, the two groove sidewalls of the positioning groove 171 are embedded into the matching groove 181.

[0087] Considering that in actual application, in the state that the clamping of the first nut 180 and the positioning groove 171 is completed, if there is no limiting of the first nut 180 in the extension direction of the positioning groove 171, the first nut 180 may be forced to exit the positioning groove 171 and enter the mounting hole 172, thereby separating from the fixing member 170. In order to solve this problem, in this embodiment, the fixing member 170 also has an anti-extraction groove 173, and the first nut 180 is provided with an elastic hook 182, and the elastic hook 182 is embedded into the anti-extraction groove 173.

[0088] Specifically, the elastic hook 182 includes a rod portion 1821 extending outward from the sidewall of the first nut 180 and a hook portion 1822 at the end of the rod portion 1821, and the hook portion 1822 abuts against the sidewall of the anti-extraction groove 173, and is used to limit the sliding of the first nut 180 in the direction of exiting the positioning groove 171.

[0089] In order to facilitate the molding and assembly, the anti-disengagement groove 173 in the embodiment is formed on the side wall of the mounting hole 172 away from the positioning groove 171. When the first nut 180 is installed, the end of the first nut 180 is inserted into the mounting hole 172, and the rod portion 1821 is bent and deformed, and the hook portion 1822 is abutted against the surface of the fixing member 170. In the process of sliding the first nut 180 into the positioning groove 171 horizontally, the hook portion 1822 slides on the surface of the fixing member 170 and gradually approaches the anti-disengagement groove 173. When the first nut 180 is slid into the positioning groove 171, the hook portion 1822 is just embedded into the anti-disengagement groove 173 and is opposite to the side groove wall of the anti-disengagement groove 173 away from the positioning groove 171, so as to prevent the first nut 180 from sliding towards the mounting hole 172.

[0090] As can be seen, Figure 4 which is actually the state when the first nut 180 and the fixing member 170 are completely assembled, Figure 5 which is actually the state after the first nut 180 is inserted into the mounting hole 172 and before it is slid into the positioning groove 171.

[0091] In Figure 4 the state shown, if it is necessary to disassemble the first nut 180, it is only necessary to lift the hook portion 1822 of the elastic clasp 182 upward from the lower side of the fixing member 170 so that it exits the anti-disengagement groove 173, and then apply a force to the first nut 180 to make it slide into the mounting hole 172.

[0092] Please refer to Figure 7 and Figure 8 , Figure 7 which is a structural schematic diagram of the connection structure of the base 130, the sliding block 120 and the insertion rod 140 from one perspective, Figure 8 which is a Figure 7 cutaway schematic diagram of the structure shown.

[0093] In Figure 7 the state shown, the base 130 is at the lower limit position, and the sliding block 120 is at the rear limit position, i.e., the sliding block 120 is at the limit position closest to the base 130. In this state, the shell 110 is at the lowest and most rear position.

[0094] Please refer to Figure 9 and Figure 10 , Figure 9 which is a structural schematic diagram of the connection structure of the base 130, the sliding block 120 and the insertion rod 140 from another perspective, Figure 10 which is a Figure 9 cutaway schematic diagram of the structure shown.

[0095] In Figure 8In the shown state, the base 130 is in the upper limit position, and the sliding block 120 is in the rear limit position. In this state, the shell 110 is in the highest and most rear position.

[0096] In order to further reduce the size of the four-way adjustable headrest 100 in the front-rear direction and make the adjustable range of the shell 110 in the front-rear direction larger, in the embodiment, the first driving member 150 and the second driving member 160 are arranged in the vertical direction with a spacing, and the second driving member 160 is below the first driving member 150. When the sliding block 120 moves to the limit position closest to the base 130, the first driving member 150 and the second driving member 160 at least partially overlap in the first direction, i.e., at least partially overlap in the vertical direction.

[0097] In actual application, the space below the first driving member 150 provides a space for the second driving member 160, which is equivalent to a certain degree of space for the movement of the sliding block 120 in the front-rear direction, so that the shell 110 can be adjusted in a larger range in the front-rear direction, and the overall structure in the front-rear direction is effectively reduced in size.

[0098] Please refer to Figure 11 , Figure 11 The connection structure of the base 130 and the insertion rod 140 is shown in another perspective view.

[0099] In order to limit the movement of the base 130 in the vertical direction, in the embodiment, the base 130 has a limiting slot 134, which extends in the first direction and is closed at least at one end, and the insertion rod 140 is provided with a limiting member 141, which extends into the limiting slot 134 and is in sliding cooperation with the limiting slot 134.

[0100] As a preferred embodiment, the limiting slot 134 is closed at both ends, and during the upward sliding of the base 130 along the insertion rod 140, the limiting member 141 moves downward relative to the limiting slot 134, and when the limiting member 141 contacts the bottom wall of the limiting slot 134, the upward sliding of the base 130 is limited, and the base 130 is positioned in the upper limit position.

[0101] During the downward sliding of the base 130 along the insertion rod 140, the limiting member 141 moves upward relative to the limiting slot 134, and when the limiting member 141 contacts the top wall of the limiting slot 134, the downward sliding of the base 130 is limited, and the base 130 is positioned in the lower limit position, as shown in Figure 11

[0102] ​In another embodiment, the limiting groove 134 can also be arranged on the insertion rod 140, and a limiting member 141 is arranged on the base 130. The limiting member 141 and the limiting groove 134 can limit the base 130. In addition, the limiting groove 134 and the limiting member 141 can be omitted, and a limiting portion is arranged on the first screw rod 151. The limiting portion can limit the relative movement of the first nut 180 in the vertical direction, and the base 130 can also be limited.

[0103] Please refer to Figures 12 to 15 , Figure 12 Fig. 4 shows a cross-sectional view of the four-way adjustable headrest 100 when the sliding block 120 is at the limit position close to the base 130, Figure 13 Fig. 5 shows Figure 12 Fig. 6 shows a connection structure between the sliding block 120 and the base 130 in Fig. 4, Figure 14 Fig. 7 shows a cross-sectional view of the four-way adjustable headrest 100 when the sliding block 120 is at the limit position away from the base 130, Figure 15 Fig. 8 shows Figure 14 Fig. 9 shows a connection structure between the sliding block 120 and the base 130 in Fig. 7.

[0104] In the embodiment, the second driving member 160 is arranged on the sliding block, and the output end of the second driving member 160 is provided with a second screw rod 161 extending in the second direction. The four-way adjustable headrest 100 further comprises a second nut 190 connected with the base 130 and threadedly matched with the second screw rod 161. The second driving member 160 is used to drive the second screw rod 161 to rotate, so as to drive the second nut 190 to move along the second screw rod 161.

[0105] It can be understood that the second nut 190 is mounted on the base 130. When the second driving member 160 drives the second screw rod 161 to rotate, the second screw rod 161 rotates relative to the second nut 190 and also moves in the second direction, i.e. in the front-rear direction, so as to drive the sliding block 120 to move in the front-rear direction, thereby realizing the front-rear position adjustment of the shell 110.

[0106] In the embodiment in which the second driving member 160 is arranged on the base 130, the second nut 190 can be mounted on the sliding block 120. In other embodiments, other driving modes can be used instead of the combination of the second screw rod 161 and the second nut 190 in the embodiment. For example, the second driving member 160 can also be a linear motor mounted on one of the sliding block 120 or the base 130, and the output end thereof is connected with the other one.

[0107] Please refer to Figures 16 to 18 , Figure 16 Fig. 10 shows a structure schematic view of the sliding block 120 from a perspective,Figure 17 Fig. 2 shows a structural schematic view of the sliding block 120 from another perspective, Figure 18 Fig. 3 shows a structural schematic view of the base 130.

[0108] In this embodiment, the base 130 is provided with guide sliding grooves 133 extending in the second direction. The sliding block 120 is provided with guide sliding portions 121 extending into the guide sliding grooves 133 and slidingly fitted with the guide sliding grooves 133. Through the combination of the guide sliding portions 121 and the guide sliding grooves 133, the sliding block 120 is slidably arranged on the base 130.

[0109] In actual application, during the process that the second driving member 160 drives the sliding block 120 to move relative to the base 130 in the second direction, the guide sliding portions 121 slide along the guide sliding grooves 133. In order to realize the stable support of the sliding block 120 and ensure the smooth sliding process, in this embodiment, the number of the guide sliding portions 121 and the guide sliding grooves 133 is multiple, and the multiple guide sliding portions 121 and the multiple guide sliding grooves 133 are one-to-one correspondingly fitted.

[0110] Moreover, in the assembled state, at least two guide sliding portions 121 are arranged in the first direction, i.e. at least two guide sliding portions 121 are arranged in the vertical direction, so as to optimize the cantilever state of the sliding block 120 and provide more powerful support for the sliding block 120. Moreover, at least two guide sliding portions 121 are arranged in the third direction, which is perpendicular to the first direction and the second direction, i.e. the left-right direction with the vehicle as the reference standard, so as to ensure the smooth and stable movement of the sliding block 120.

[0111] In this embodiment, the guide sliding portions 121 and the guide sliding grooves 133 are provided with limiting fitting structures for limiting the movement stroke of the sliding block 120. In actual application, when the sliding block 120 moves away from the base 130 to the limiting fitting structure to complete the fitting, the sliding block 120 is in the limit position away from the base 130, and the sliding block 120 cannot continue to move away from the base 130 due to the limitation of the limiting fitting structure. When the sliding block 120 moves towards the base 130 to contact the second driving member 160 and the second nut 190, the sliding block 120 is in the limit position close to the base 130, and cannot continue to move towards the base 130.

[0112] In another embodiment, the guide sliding portions 121 can also be arranged on the base 130, and the guide sliding grooves 133 are arranged on the sliding block 120, and through the fitting of the guide sliding grooves 133 and the guide sliding portions 121, the sliding block 120 can also be slidably arranged on the base 130.

[0113] Please refer to Figure 19 , Figure 19 Fig. 4 shows a structural schematic view of the sliding block 120.Figure 18 An enlarged schematic diagram of region A in the middle.

[0114] The four-way adjustable headrest 100 provided in this embodiment also includes an elastic tensioning member 191. The guide slide groove 133 is provided with elastic tensioning members 191 on the two opposite sidewalls of the groove in the first direction. The elastic tensioning member 191 abuts against the guide slide part 121.

[0115] In practice, the two vertical surfaces of the guide slide 121 abut against the two elastic tensioners 191 respectively, while they do not contact the corresponding sidewalls of the guide slide groove 133. In other words, the guide slide groove 133 limits the vertical movement of the guide slide 121 through the elastic tensioners 191. In this embodiment, the elastic tensioner 191 is a curved spring sheet, and the convex arc surface of the spring sheet abuts against the surface of the guide slide 121.

[0116] By configuring the elastic tensioner 191, on the one hand, a preload is continuously provided for the assembly of the guide slide 121 within the guide slide groove 133, compensating for the adverse effects caused by dimensional tolerances, i.e., preventing the sliding block 120 from shaking or loosening. On the other hand, it reduces the sliding friction of the guide slide 121 and helps the guide slide 121 to start and stop smoothly within the guide slide groove 133, ensuring a smooth and stable adjustment process.

[0117] Please refer to the following: Figure 20 and Figure 21 , Figure 20 The diagram shown is an exploded view of the connection structure between the second nut 190 and the base 130. Figure 21 As shown Figure 20 Enlarged schematic diagram of region B in the middle.

[0118] In this embodiment, to reduce assembly difficulty, the base 130 has a recessed mounting groove 132 on one side in the first direction, and the second nut 190 is inserted into the mounting groove 132. In fact, the opening of the mounting groove 132 faces upwards and is located on the bottom wall of the relief cavity 131. During assembly, the second nut 190 can be inserted downwards into the mounting groove 132 through the relief cavity 131.

[0119] With the second nut 190 embedded in the mounting groove 132, the groove wall of the mounting groove 132 prevents the second nut 190 from moving in the horizontal direction, so that when the second drive member 160 drives the second lead screw 161 to rotate, the second nut 190 can remain fixed relative to the base 130, thereby driving the sliding block 120 to move closer to or away from the base 130 in the front-back direction.

[0120] In another embodiment, the second nut 190 can also be connected to the base 130 in other detachable ways, or it can be fixed to the base 130 by means such as welding, or it can be integrally formed with the base 130.

[0121] Please refer to Figure 22 and Figure 23 , Figure 22 Fig. 2 shows a schematic diagram of the connection structure of the second driving member 160 and the sliding block 120, Figure 23 Fig. 3 shows Figure 22 Fig. 4 shows an exploded schematic diagram of the structure shown in Fig. 3.

[0122] The four-way adjustable headrest 100 provided by the embodiment further comprises a second shock pad 162, which is arranged between the second driving member 160 and the sliding block 120. The second driving member 160 is a rotary motor, and the second shock pad 162 is provided with a through hole for allowing the rotating shaft of the second driving member 160 to pass through.

[0123] It can be understood that the second shock pad 162 also plays a role of isolating vibration transmission, so as to avoid the vibration of the second driving member 160 from being transmitted to the sliding block 120 and reduce noise.

[0124] In summary, the four-way adjustable headrest 100 provided by the utility model has the characteristics of simpler and more compact structure and better stability.

[0125] The above only describes the preferred embodiments of the utility model and is not used to limit the utility model. For those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A four-way adjustable headrest, characterized by, The four-way adjustable headrest (100) comprises a sliding block (120), a base (130), a plug rod (140), a first driving member (150) and a second driving member (160), wherein the sliding block (120) is slidably arranged on the base (130), and the base (130) is slidably arranged on the plug rod (140); The first driving member (150) is arranged on the plug rod (140) or the base (130) and is used to drive the base (130) to move in a first direction along the plug rod (140); and the second driving member (160) is arranged on the base (130) or the sliding block (120) and is used to drive the sliding block (120) to move in a second direction relative to the base (130), wherein the first direction is perpendicular to the second direction.

2. The four-way adjustable headrest of claim 1, wherein, One end of the plug rod (140) is provided with a fixing member (170), the first driving member (150) is arranged on the fixing member (170), and an output end of the first driving member (150) is connected with the base (130), or The first driving member (150) is arranged on the base (130), and an output end of the first driving member (150) is connected with the fixing member (170).

3. The four-way adjustable headrest of claim 2, wherein, The first driving member (150) is arranged on the base (130), and an output end of the first driving member (150) is provided with a first screw rod (151) extending in the first direction; The four-way adjustable headrest (100) further comprises a first nut (180), which is connected with the fixing member (170) and is in threaded cooperation with the first screw rod (151); The first driving member (150) is used to drive the first screw rod (151) to rotate, so as to drive the first nut (180) to move along the first screw rod (151).

4. The four-way adjustable headrest of claim 3, wherein, The base (130) is provided with a letting cavity (131) on one side corresponding to the fixing member (170), and the letting cavity (131) is used for embedding the fixing member (170).

5. The four-way adjustable headrest of claim 3, wherein, The fixing member (170) has a positioning groove (171), and an outer side wall of the first nut (180) is annularly provided with a cooperation groove (181), and opposite groove side walls of the positioning groove (171) are embedded into the cooperation groove (181) to position the first nut (180).

6. The four-way adjustable headrest of claim 5, wherein, The fixing member (170) further has a mounting hole (172), and a hole diameter of the mounting hole (172) is greater than a width of the positioning groove (171); and the mounting hole (172) is in communication with one end of the positioning groove (171).

7. The four-way adjustable headrest of claim 5, wherein, The fixing member (170) further has an anti-disengagement groove (173), and the first nut (180) is provided with an elastic clamping hook (182), and the elastic clamping hook (182) is embedded into the anti-disengagement groove (173).

8. The four-way adjustable headrest of claim 7, wherein, The elastic hook (182) comprises a rod portion (1821) extending outwardly from the sidewall of the first nut (180) and a hook portion (1822) at the end of the rod portion (1821), the hook portion (1822) abutting against the sidewall of the anti-extraction groove (173) for limiting the sliding of the first nut (180) towards the direction of exiting the positioning groove (171).

9. The four-way adjustable headrest of claim 1, wherein, The second driving member (160) is arranged on the sliding block (120), and an output end of the second driving member (160) is provided with a second screw rod (161) extending in the second direction; The four-way adjustable headrest (100) further comprises a second nut (190) connected with the base (130) and threadedly matched with the second screw rod (161). The second driving member (160) is configured to drive the second screw rod (161) to rotate, thereby driving the second nut (190) to move along the second screw rod (161).

10. The four-way adjustable headrest of claim 9, wherein, The base (130) is recessed with a mounting groove (132) on one side in the first direction, and the second nut (190) is inserted into the mounting groove (132).

11. The four-way adjustable headrest of claim 1, wherein, One of the base (130) and the sliding block (120) is provided with a guide sliding groove (133) extending in the second direction. The other one is provided with a guide sliding portion (121) extending into the guide sliding groove (133) and slidably matched with the guide sliding groove (133).

12. The four-way adjustable headrest of claim 11, wherein, The four-way adjustable headrest (100) further comprises an elastic tensioning member (191), and the guide sliding groove (133) is provided with the elastic tensioning member (191) on each of the two sidewalls opposite in the first direction, and the elastic tensioning member (191) abuts against the guide sliding portion (121).

13. The four-way adjustable headrest of claim 1, wherein, When the sliding block (120) moves to the limit position close to the base (130) in the second direction, the first driving member (150) and the second driving member (160) at least partially coincide in the first direction.

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