Floating adjusting structure and electric headrest

Abstract

The utility model discloses a floating adjusting structure and an electric headrest. The floating adjusting structure comprises a fixing frame, a rack and a floating assembly, the fixing frame is fixedly arranged, and the rack is connected with the fixing frame in a matched mode through the floating assembly; the rack is suitable for swinging, and the floating assembly is suitable for providing an activity space for swinging of the rack; the electric headrest comprises the floating adjusting structure. The headrest has the beneficial effects that by arranging the floating assembly, when the headrest ascends and descends in a curve mode, the rack can swing along the fixing frame, and then the rack is matched with the curve track of the headrest body; in this way, after adjustment, the headrest body and the arc of the seat backrest can better adapt to each other and better conform to human engineering, and the sitting comfort is improved.

Description

Technical Field

[0001] The present application relates to the technical field of automotive accessories, and particularly relates to a floating adjustment structure and an electric headrest. Background Art

[0002] An automotive headrest is a driving comfort configuration item and a safety protection item. When a vehicle is rear-ended, the human body will fall backward due to inertia. At this time, the pressure of the vehicle accelerating or decelerating is concentrated on the vulnerable neck and head of the human body, and the headrest plays a buffering role to protect the human head.

[0003] Since everyone's height and sitting posture are different, the height requirements for automotive headrests are also different. Therefore, more and more electric liftable headrests have emerged on the market. However, the existing headrests all adopt a direct lift and lower adjustment method, and thus the arc between the headrest and the seat back cannot be well adapted after adjustment, resulting in discomfort during use. For this reason, a floating adjustment structure and an electric headrest are proposed to solve the above technical problems. Utility Model Content

[0004] One of the purposes of the present application is to provide a floating adjustment structure.

[0005] Another purpose of the present application is to provide an electric headrest.

[0006] To achieve at least one of the above purposes, the technical solution adopted in the present application is as follows: A floating adjustment structure includes a fixed frame, a frame, and a floating component. The fixed frame is fixedly arranged, and the frame is connected to the fixed frame through the floating component; the frame is adapted to swing, and the floating component is adapted to provide a moving space for the swing of the frame.

[0007] Preferably, the floating component includes an elastic member, and the frame is connected to the fixed frame through the elastic member; when the frame swings, the elastic member is adapted to elastically deform so that the frame swings along the fixed frame.

[0008] Preferably, the floating component includes a floating block and a floating groove. The floating block is installed on the frame, and the floating groove is arranged on the fixed frame; the floating block is in snap-fit with the floating groove and there is a moving gap between the two, so that the frame swings along the fixed frame.

[0009] Preferably, the floating component includes an elastic member, a floating block, and a floating groove. The floating block is connected to the frame through the elastic member, and the floating groove is arranged on the fixed frame; the floating block is in snap-fit with the floating groove and there is a moving gap between the two, so that the frame is adapted to swing along the fixed frame under the combined action of the deformation of the elastic member and the moving gap.

[0010] Preferably, a mounting groove connected to the floating groove is provided at the top of the fixed frame; when installing the rack, the floating block is suitable for first cooperating with the mounting groove, and then the floating block is suitable for moving along the mounting groove until it is snap-fitted with the floating groove, and at this time the floating block is locked to the fixed frame by a limit assembly.

[0011] Preferably, the limit block comprises a limit block and a limit slot, the limit block is installed on the floating block, and the limit slot is arranged on the fixed frame; or the limit block is installed on the fixed frame, and the limit slot is arranged on the floating block; the limit block cooperates with the limit slot to realize the locking and limiting of the floating block.

[0012] Preferably, the floating block and the frame are snap-fitted with each other and a snap-fit ​​gap is left therebetween. The elastic member is arranged in the snap-fit ​​gap and abuts against the floating block and the frame.

[0013] Preferably, a card block with an "I"-shaped structure is provided at the bottom end of the floating block, a card slot is provided at the top of the frame, and the upper ends of the inner walls on both sides of the card slot extend inwardly to form a protrusion, thereby making the card slot have a "T"-shaped structure; the two sides of the elastic member are recessed inwardly to form a recessed portion and a slot is provided in the middle of the elastic member; the protrusion is plug-fitted with the recessed portion, the vertical section of the card block is plug-fitted with the slot and the card slot, and the elastic member is abutted against the outer sides of the card block.

[0014] An electric headrest comprises the above-mentioned floating adjustment structure.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] The utility model is provided with a floating component, and when the headrest is raised and lowered in a curved manner, the frame can swing along the fixed frame, and thus adapt to the curved trajectory of the headrest body; in this way, after adjustment, the headrest body and the arc of the seat back can be better adapted to each other, which is more ergonomic and improves the comfort of riding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 It is a side structural schematic diagram of the utility model.

[0019] Figure 3 It is a schematic diagram of the headrest curve of the utility model when it is raised and lowered.

[0020] Figure 4 Schematic diagram of the drive mechanism of the present utility model.

[0021] Figure 5 Schematic diagram of the swing range of the drive mechanism of the present utility model.

[0022] Figure 6 For the present utility model Figure 5 Schematic diagram of the partial structure in

[0023] Figure 7 Schematic diagram of the cooperative installation of the fixing bracket and the drive mechanism of the present utility model.

[0024] Figure 8 Schematic diagram when the fixing bracket and the drive mechanism of the present utility model are separated.

[0025] Figure 9 Schematic diagram of the specific structure of the floating component of the present utility model.

[0026] Figure 10 Schematic diagram of the specific structures of the floating block, elastic member and card slot of the present utility model.

[0027] Figure 11 Schematic diagram of the limit component and the installation slot structure of the present utility model.

[0028] Figure 12 Schematic diagram when the moving mechanism of the present utility model is installed and cooperated with the fixing bracket.

[0029] In the figure: 1, headrest body; 2, drive mechanism; 201, drive device; 202, lead screw; 203, drive plate; 204, frame; 3, sound insulation cotton; 4, fixing bracket; 5, curved rod; 6, sleeve; 7, floating component; 701, elastic member; 702, floating block; 703, floating groove; 8, installation slot; 9, limit component; 901, limit block; 902, limit groove; 10, card slot; 11, recessed part; 12, slot; 13, protruding part; 14, moving gap; 15, clamping gap. Specific embodiments

[0030] Next, in combination with the specific embodiments, the present application will be further described. It should be noted that on the premise of no conflict, the following described embodiments or technical features can be arbitrarily combined with each other to form new embodiments.

[0031] In the description of the present application, it should be noted that for orientation terms, such as the terms "center", "horizontal", "vertical", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship are based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present application.

[0032] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence.

[0033] In the prior art, the electric headrests on car backrests are all adjusted in a straight up and down manner. For sedans, there are generally only two rows of seats in the interior, and the backrests of the seats are relatively high. Therefore, the straight up and down adjustment method can also be applied to the adjustment of the headrests. However, for some seven-seat or nine-seat vehicles, there will be a third row of seats at this time. In order to provide more usable space at the rear of the vehicle, the third row of seats is generally foldable. Of course, the seats in this row are also set relatively low, and thus the travel during headrest adjustment will be longer. Therefore, the following problem will occur: after adjustment, the curvature of the headrest and the back of the seat cannot be well adapted, that is, it does not conform to ergonomics, and thus causes discomfort to passengers.

[0034] Therefore, in the improvement of the prior art, the fixing frame 4 is fixedly installed in the seat backrest, and the headrest body 1 is slidably installed in a curved manner on the side of the fixing frame 4. The driving mechanism 2 mainly includes a frame 204, a driving device 201 (motor), a lead screw 202, and a driving plate 203. Among them, the structures such as the motor lead screw 202 that drive the headrest body 1 to move up and down are mainly installed on the frame 204. Since the headrest body 1 is adjusted to move up in a curved manner, it will have a component displacement in the horizontal direction while moving in the vertical direction. Therefore, the frame 204 cannot be fixedly installed, otherwise it will interfere with the curved lifting of the headrest body 1.

[0035] Therefore, the inventor of the present application has developed a floating adjustment structure, and one of its embodiments is as Figures 1 to 12 shown, including a fixing frame 4, a frame 204, and a floating component 7. The fixing frame 4 is fixedly arranged (in the seat backrest), and the frame 204 is cooperatively connected to the fixing frame 4 through the floating component 7.

[0036] It can be understood that when the headrest performs a curved lifting motion, the frame 204 can swing along the fixed frame 4 (i.e., the floating assembly 7 can provide a moving space for the swinging of the frame 204), thereby adapting to the curved trajectory of the headrest body 1; in this way, after adjustment, the headrest body 1 can better adapt to the arc of the seat back, which is more in line with ergonomics and improves the comfort during riding.

[0037] It should be noted that here the frame 204 is installed at the bottom end of the fixed frame 4 by means of the floating assembly 7, that is, the driving mechanism 2 is installed at the bottom end of the fixed frame 4 through the floating assembly 7 and the output end is connected to the headrest body 1.

[0038] Thus, it can be seen that when adjusting the height of the headrest body 1, in the initial state, as shown in (a) of Figure 3 , this is the lowest state of the headrest body 1. Start the driving mechanism 2, and the driving mechanism 2 can drive the headrest body 1 to perform a curved upward adjustment along the fixed frame 4, as shown in (b) of Figure 3 ; thus, it can better fit with the passenger's head, greatly improving the comfort.

[0039] That is to say, when the driving mechanism 2 drives the headrest body 1 to move upward, at this time, the frame 204 of the driving mechanism 2 can move (swing) along the fixed frame 4 under the action of the floating assembly 7, so that the frame 204 adapts to the curved trajectory of the headrest body 1.

[0040] It should be noted that we know that there should be a certain inclination angle between the backrest and the seat cushion of the car, that is, the two will not be in a vertical state, so as to meet the comfort when the human body leans back. If the headrest body 1 is adjusted, and the headrest body 1 performs an inclined linear lifting adjustment along the inclined backrest, after the headrest body 1 is raised, it will move away from the backrest. In this way, the passenger's head has to tilt back a lot to cooperate with the headrest body 1, thus bringing discomfort. Therefore, when the headrest body 1 is raised, it needs to move forward and close to the backrest, so as to be suitable for people of different heights to use comfortably. It should be known that during the upward movement of the headrest body 1, it will not deviate too much from its original position. Therefore, the deviation swing angle θ of the driving mechanism 2 should not be too large either. For example, θ can be between 5° and 15°.

[0041] In one embodiment of the present application, as shown in Figures 6 to 11 , there are various structural forms of the floating assembly 7, including but not limited to the following three:

[0042] Structure 1: As shown in Figure 6 , the floating assembly 7 includes an elastic member 701, and the driving mechanism 2 (frame 204) is installed on the fixed frame 4 through the elastic member 701.

[0043] It can be understood that, for example, the elastic member 701 can be made of rubber or silica gel. Since the elastic member 701 can be deformed when subjected to pressure, when the headrest body 1 is adjusted in a curved manner for lifting and lowering, the elastic member 701 can undergo elastic deformation so that the driving mechanism 2 (the frame 204) moves (swings) along the fixed frame 4.

[0044] Structure Two: As Figure 7 and Figure 8 shown, the floating assembly 7 includes a floating block 702 and a floating groove 703. The floating block 702 is installed on the driving mechanism 2 (the frame 204), the floating groove 703 is provided on the fixed frame 4, and the floating block 702 is in snap-fit with the floating groove 703 with an activity gap 14 left between them.

[0045] It can be understood that due to the existence of the activity gap 14, relative movement can occur between the floating block 702 and the floating groove 703. Further, when the headrest body 1 is adjusted in a curved manner for lifting and lowering, the cooperation between the floating block 702 and the floating groove 703 can enable the driving mechanism 2 (the frame 204) to move (swing) along the fixed frame 4.

[0046] Structure Three: The floating assembly 7 includes an elastic member 701, a floating block 702, and a floating groove 703. The floating block 702 is connected to the driving mechanism 2 (the frame 204) through the elastic member 701, and the floating groove 703 is provided on the fixed frame 4; the floating block 702 is in snap-fit with the floating groove 703 with an activity gap 14 left between them.

[0047] It can be understood that due to the existence of the activity gap 14 and the setting of the elastic member 701, when the headrest body 1 is adjusted in a curved manner for lifting and lowering, the cooperation between the floating block 702 and the floating groove 703 and the deformation of the elastic member 701 can enable the driving mechanism 2 (the frame 204) to move (swing) along the fixed frame 4.

[0048] It should be noted that all three structures can meet the actual requirements, and those skilled in the art can make a choice according to the actual situation. It should be known that for Structure 1, the swing amplitude of the driving mechanism 2 (frame 204) depends on the deformation degree of the elastic member 701. For Structure 2, the swing amplitude of the driving mechanism 2 (frame 204) depends on the clearance 14 between the floating block 702 and the floating groove 703. For Structure 3, its essence is the combination of the two, that is, the swing amplitude of the driving mechanism 2 (frame 204) depends on the deformation degree of the elastic member 701 and the size of the clearance 14. Therefore, when making specific settings, the deformation degree of the elastic member 701 and the clearance 14 can compensate each other, so as to make the stability of the driving mechanism 2 (frame 204) better, and at the same time improve the service life of the entire mechanism.

[0049] Exemplarily, assume that the swing amplitude of the driving mechanism 2 (frame 204) is θ, the deformation degree of the elastic member 701 corresponding to Structure 1 is S, and the range of the clearance 14 corresponding to Structure 2 is C; for Structure 3, the deformation degree of the elastic member 701 can be set to 1 / 2 S, and the range of the clearance 14 is 1 / 2 C, that is, the superposition of the two can achieve the overall swing amplitude θ of the driving mechanism 2 (frame 204). Therefore, compared with Structure 1 and Structure 2 alone, the deformation degree of the elastic member 701 and the range of the clearance 14 in Structure 3 can be set smaller, which can make its service life longer, and at the same time improve its performance stability and reliability. For example, in an environment with bumpy road conditions, Structure 3 can maintain a more stable working state compared with other structures, reducing the possibility of failures and damages.

[0050] As a further description of the above Structure 3 embodiment, in one embodiment of the present application, as Figure 7 and Figure 8 shown, how the floating block 702 is fitted and installed with the floating groove 703 on the fixed frame 4. An installation groove 8 communicating with the floating groove 703 is provided at the top of the fixed frame 4.

[0051] It can be understood that the upper end of the floating block 702 is in a "T" - shaped structure. When installing the driving mechanism 2 (frame 204), first, the floating block 702 is fitted with the installation groove 8, so that the horizontal part at the top of the floating block 702 extends out of the installation groove 8, and then the floating block 702 is moved along the installation groove 8 until the floating block 702 is engaged with the floating groove 703. Of course, at this time, there is still a certain clearance 14 due to the snap - fit between the two. Although it facilitates the installation and fitting of the two, under the swinging action of the driving mechanism 2 (frame 204), it is easy for the floating block 702 and the floating groove 703 to move out of position.

[0052] Therefore, to solve the above technical problems, as Figure 7 shown, a limiting component 9 can be provided between the floating block 702 and the fixed frame 4. It should be noted that when the floating block 702 moves and cooperates with the floating groove 703, at this time, the floating block 702 can be locked to the fixed frame 4 through the limiting component 9, thereby realizing the stable cooperation between the driving mechanism 2 (frame 204) and the fixed frame 4, ensuring the stability and smooth operation of the entire device.

[0053] As Figure 11 shown, the limiting component 9 includes a limiting block 901 and a limiting groove 902. Of course, there are various installation methods for the limiting block 901 and the limiting groove 902, including but not limited to the following two:

[0054] Method 1: The limiting block 901 is installed on the floating block 702, and the limiting groove 902 is provided on the fixed frame 4. Method 2: The limiting block 901 is installed on the fixed frame 4, and the limiting groove 902 is provided on the floating block 702.

[0055] It can be understood that the cooperation mode between the limiting block 901 and the limiting groove 902 is synchronized with the cooperation between the floating block 702 and the floating groove 703. That is, in the initial installation state, as Figure 12 shown in (c) of, at this time, the limiting block 901 and the limiting groove 902 are in a misaligned state. When the floating block 702 enters the floating groove 703 from the installation groove 8, the limiting block 901 will also move towards the limiting groove 902 under the drive of the floating block 702. When the floating block 702 cooperates with the floating groove 703, at this time, the limiting block 901 will also move and snap into the limiting groove 902 to realize the installation and locking of the floating block 702, as Figure 12 shown in (d) of.

[0056] It should be noted that, as Figure 10 shown, the floating block 702 can be integrally formed with the limiting block 901, and the floating block 702 is made of a plastic part. Therefore, when the limiting block 901 does not cooperate with the limiting groove 902, at this time, the limiting block 901 is in a state of compressive deformation under the action of the fixed frame 4. When the limiting block 901 corresponds to the limiting groove 902, at this time, the limiting block 901 will lose the extrusion effect and recover its deformation, so that the limiting block 901 and the limiting groove 902 are in limiting engagement.

[0057] Of course, in the above manner of snap-fit between the top end of the floating block 702 and the fixed frame 4, it can facilitate the installation and disassembly between the two and improve the disassembly and assembly efficiency. Therefore, based on the above embodiments, a similar snap-fit manner can also be adopted for the installation between the bottom end of the floating block 702 and the driving mechanism 2 (frame 204) and the elastic member 701, thereby facilitating subsequent disassembly and assembly.

[0058] Specifically, as Figure 6 and Figure 10 shown, that is, a clamping fit is carried out between the floating block 702 and the driving mechanism 2 (frame 204), and there is a clamping gap 15 between the two. The elastic member 701 is arranged in the clamping gap 15, and the elastic member 701 is in abutting fit with the floating block 702 and the driving mechanism 2 (frame 204), so as to realize the installation of the bottom end of the floating block 702 and the driving mechanism 2 (frame 204) through the elastic member 701.

[0059] It should be known that at this time, the floating block 702 is mainly installed on the driving mechanism 2 (frame 204) by means of clamping, rather than completely connecting the frame 204 through the elastic member 701. Because the elastic member 701 is made of flexible material, if the frame 204 is completely connected by the elastic member 701, the elastic member 701 is easily deformed irreversibly and damaged under the action of the driving mechanism 2, and the service life is short. In this embodiment, the elastic member 701 mainly plays a role of filling and connecting, so as to ensure the stability of the connection of the frame 204 and subsequent disassembly and assembly on the premise of ensuring the movable connection of the frame 204, thereby increasing the service life and reliability of the whole device.

[0060] As a further description of the above embodiment, the matching manner between the floating block 702 and the frame 204 is as follows: a clamping block with a "work" - shaped structure is integrally formed at the bottom end of the floating block 702, and a clamping groove 10 is arranged at the top end of the driving mechanism 2 (frame 204). Raised portions 13 extend inwards from the upper ends of the inner walls on both sides of the clamping groove 10, so that the clamping groove 10 has a "T" - shaped structure. Depressions 11 are formed by inward depressions on both sides of the elastic member 701, and a slot 12 is arranged in the middle of the elastic member 701. As Figure 10 shown, it is the shape structure of the elastic member 701. For example, the elastic member 701 is also integrally formed by using rubber or silica gel material.

[0061] It can be understood that when matching the floating block 702, the elastic member 701 and the driving mechanism 2 (frame 204), first, the elastic member 701 can be inserted into the clamping groove 10, that is, the raised portion 13 and the depression 11 are in plug - in fit. Then, the vertical section of the clamping block is inserted into the slot 12. Of course, at the same time, the clamping block will also be inserted into the clamping groove 10, so as to realize the plug - in fit among the three.

[0062] Thus, as Figure 6As shown, the floating block 702, the elastic member 701 and the slot 10 are tightly engaged and limited, and due to the action of the elastic member 701, the floating block 702 and the driving mechanism 2 (frame 204) can be in flexible contact, which can greatly reduce the wear between the floating block 702 and the driving mechanism 2 (frame 204). At the same time, the elastic member 701 can also play a certain shock-absorbing and buffering role, that is, when the car is bumped, the elastic member 701 can absorb the impact energy through elastic deformation, and while ensuring a stable connection, it also plays a role in vibration reduction and noise reduction.

[0063] Of course, in order to further improve the noise reduction effect, such as Figure 1 and Figure 4 As shown, sound insulation (such as sound insulation cotton 3) can be installed on both sides of the driving mechanism 2 (frame 204). The design of these sound insulation can not only effectively reduce the noise generated by the driving mechanism 2 during operation, but also improve the stability of the entire device to a certain extent. Since the driving mechanism 2 is installed inside the backrest, the provision of the sound insulation can also reduce the hard friction between the driving mechanism 2 and the backrest, thereby protecting the backrest and improving its service life.

[0064] The embodiments of the present application include Figure 1 and Figure 3 As shown, the cooperation between the headrest body 1 and the fixing frame 4 is as follows: a curved rod 5 is installed at the bottom end of the headrest body 1, the bottom end of the curved rod 5 is connected to the output end of the driving mechanism 2, and a sleeve 6 is fixedly installed on the side of the fixing frame 4, and the curved rod 5 and the sleeve 6 are slidably cooperated to realize the curved sliding installation of the headrest body 1.

[0065] It is understandable that, in the process of the driving mechanism 2 driving the curved rod 5 to rise, the curved rod 5 can move upward in a curved manner under the guidance of the sleeve 6. Of course, in order to improve the stability of the headrest body 1, the curved rod 5 can be a pair and connected to the headrest body 1 for support, or the curved rod 5 can be an integrated molding structure in the shape of a "冂", thereby making the entire structure of the headrest body 1 more stable.

[0066] like Figure 4As shown, the present application does not limit the structural form of the driving mechanism 2. The following provides a specific structure for reference: The driving mechanism 2 includes a frame 204, a driving device 201, a lead screw 202, and a driving plate 203. The frame 204 is installed at the bottom end of the fixing frame 4 through a floating assembly 7. The lead screw 202 is vertically rotatably installed in the frame 204. The driving plate 203 is vertically slidably installed in the frame 204 and cooperates with the lead screw 202. Moreover, the driving plate 203 is detachably installed with the bottom end of the curved rod 5 (for example, bolt installation or snap ring connection installation). The driving device 201 is installed on the frame 204 and is connected to the lead screw 202 through an output end. Of course, the driving device 201 is common knowledge known to those skilled in the art and can be a motor, a rotary cylinder, or a rotary hydraulic cylinder, etc. Here, a motor is preferably used.

[0067] It can be understood that when adjusting the height of the headrest body 1, at this time, start the motor to rotate forward. The motor drives the lead screw 202 to rotate. The lead screw 202 acts on the driving plate 203, and the driving plate 203 can drive the headrest body 1 to perform an upward adjustment through the curved rod 5. Similarly, vice versa, when the motor rotates in reverse, at this time, the headrest body 1 can be adjusted downward.

[0068] Of course, in the above driving mechanism 2, the form of a hydraulic cylinder and a pneumatic cylinder can also be adopted to drive the headrest body 1 to perform lifting adjustment. If the form of a hydraulic cylinder is adopted, a supporting hydraulic system is required, and its cost is high for a single action and the maintenance cost is high; if the form of a pneumatic cylinder is adopted, its transmission exhaust noise is large and the sealing requirement is higher. For the above-mentioned cooperation mode of the motor and the lead screw 202, first of all, it has a self-locking performance, that is, when the motor stops running, the headrest body 1 can stably maintain the adjusted position; at the same time, it is simple to maintain, has low noise, and can work normally in high / low temperature, anti-corrosion / explosion-proof harsh environments. Therefore, this method is preferably adopted.

[0069] In one embodiment of the present application, as Figures 7 to 9 shown, in order to further improve the stability and firmness of the cooperation between the driving mechanism 2 and the fixing frame 4, a pair of related installation structures such as the floating block 702, the floating groove 703, the elastic member 701, and the card slot 10 are preferably adopted and are arranged symmetrically left and right so that both sides of the top end of the driving mechanism 2 cooperate with the fixing frame 4, greatly improving the stability.

[0070] It should be noted that, as Figure 8 shown, the number of the corresponding installation grooves 8 can be set to one. We know that the installation groove 8 is provided to enable the installation and cooperation between the floating block 702 and the floating groove 703. And when a pair of floating grooves 703 are provided, in fact, only one installation groove 8 can achieve the cooperation between the floating block 702 and the floating groove 703. Specifically, asFigure 8 As shown, the installation groove 8 provided on the left is communicated with the floating groove 703, and the floating groove 703 provided on the right is located at the right end of the fixing frame 4 and is in a communicated state with the outside.

[0071] Another aspect of the present application provides an electric headrest, which specifically includes the above-mentioned floating adjustment structure.

[0072] The working principle of the present utility model is as follows:

[0073] First, the fixing frame 4 is fixedly installed inside the backrest. Of course, the driving mechanism 2 is also located inside the backrest; and the curved rod 5 extends out of the top of the backrest. When it is necessary to adjust the height of the headrest body 1, the motor is started to rotate, the motor drives the lead screw 202 to rotate, the lead screw 202 acts on the driving plate 203, and the driving plate 203 can drive the headrest body 1 to perform a curved lifting adjustment through the curved rod 5. At the same time, the frame 204 of the driving mechanism 2 swings under the action of the floating groove 703, the floating block 702 and the elastic member 701, that is, the frame 204 will drive the entire driving mechanism 2 to swing, so as to cooperate with the curved lifting trajectory of the headrest body 1.

[0074] It should be noted that during subsequent folding, that is, when the headrest body 1 is adjusted downward and contracted, at this time, the headrest body 1 will move downward toward the backrest, and after moving to the lowest position, at this time, the headrest body 1 will closely adhere to the backrest, and the headrest body 1 will not be squeezed and compressed. Of course, a groove body can also be provided at the top of the backrest. After the headrest body 1 moves down to the lowest position, at this time, the headrest body 1 can move downward in a curve and enter the groove body to be hidden. At this time, the headrest body 1 can be protected when the seat (backrest) is folded, which greatly improves the protection performance of the headrest body 1 and thus improves the service life.

[0075] The above describes the basic principle, main features and advantages of the present application. Those skilled in the art of this industry should understand that the present application is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present application. Without departing from the spirit and scope of the present application, the present application will have various changes and improvements, and these changes and improvements all fall within the scope of the present application claimed. The scope of protection required by the present application is defined by the appended claims and their equivalents.

Claims

1. A floating adjustment structure, characterized in that: include: A fixed frame, a rack and a floating assembly, wherein the fixed frame is fixedly arranged, and the rack is matched and connected with the fixed frame through the floating assembly; The frame is suitable for swinging, and the floating assembly is suitable for providing a movement space for the swinging of the frame.

2. The floating adjustment structure according to claim 1, characterized in that: The floating assembly includes an elastic member, and the frame is connected to the fixed frame via the elastic member; when the frame swings, the elastic member is adapted to be elastically deformed so that the frame swings along the fixed frame.

3. The floating adjustment structure according to claim 1, characterized in that: The floating assembly includes a floating block and a floating groove, wherein the floating block is mounted on the frame and the floating groove is arranged on the fixed frame; the floating block and the floating groove are snap-fitted with each other and a movable gap is left therebetween, thereby enabling the frame to swing along the fixed frame.

4. The floating adjustment structure according to claim 1, characterized in that: The floating assembly includes an elastic member, a floating block and a floating groove. The floating block is connected to the frame through the elastic member, and the floating groove is arranged on the fixed frame. The floating block and the floating groove are snap-fitted with each other and a movable gap is left therebetween, so that the frame is suitable for swinging along the fixed frame under the deformation of the elastic member and the cooperation of the movable gap.

5. The floating adjustment structure according to claim 3 or 4, characterized in that: The top of the fixed frame is provided with a mounting groove connected with the floating groove; when installing the rack, the floating block is suitable for first cooperating with the mounting groove, and then the floating block is suitable for moving along the mounting groove until it is snap-fitted with the floating groove, and at this time the floating block is locked to the fixed frame by a limit assembly.

6. The floating adjustment structure according to claim 5, characterized in that: The limit assembly includes a limit block and a limit slot, wherein the limit block is installed on the floating block and the limit slot is arranged on the fixed frame; or the limit block is installed on the fixed frame and the limit slot is arranged on the floating block; the limit block cooperates with the limit slot to realize the locking and limiting of the floating block.

7. The floating adjustment structure according to claim 4, characterized in that: The floating block is engaged with the frame and a gap is left between them. The elastic member is arranged in the gap and abuts against the floating block and the frame.

8. The floating adjustment structure according to claim 7, characterized in that: A card block with an "I"-shaped structure is provided at the bottom end of the floating block, and a card slot is provided at the top of the frame. The upper ends of the inner walls on both sides of the card slot extend inwardly to form a protrusion, so that the card slot has a "T"-shaped structure; the two sides of the elastic member are recessed inwardly to form a recessed portion and a slot is provided in the middle of the elastic member; the protrusion is plug-fitted with the recessed portion, the vertical section of the card block is plug-fitted with the slot and the card slot, and the elastic member is abutted against the outer sides of the card block.

9. An electric headrest, characterized in that: It comprises a floating adjustment structure as described in any one of claims 1-8.

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