Seat cover tightening device matched with automobile seat leg support

Abstract

The utility model discloses a seat cover tightening device matched with an automobile seat leg support, and belongs to the technical field of automobile seat parts. Comprising a support, the support is composed of a left leg support fixing plate and a right leg support fixing plate which are independent of each other and correspond to each other, and in the using state, the left leg support fixing plate and the right leg support fixing plate are fixed to an automobile seat leg support in a left-right corresponding state; the left side of the leg support left fixing plate is folded downwards to form a left bending sheet, the right side of the leg support right fixing plate is folded downwards to form a right bending sheet, and the left bending sheet and the right bending sheet correspond to each other. The support has the advantages that the support has good universality for leg supports of different vehicle types; the reliable control effect of the left bending sheet and the right bending sheet on the limit position degree of the tightening rod can be fully guaranteed; the action transmission links are reduced, and the balance effect of acting force of the torsion spring on the two ends of the tightening rod is ensured; the abrasion of the left and right torsion spring shaft sleeves caused by rotation is avoided; and the left and right torsion springs are ensured to stably and reliably play a role.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile seat components, and particularly relates to a seat cover tightening device matched with an automobile seat leg rest. Background Art

[0002] Generally, leg rests are provided on seats of relatively high-class, especially luxury cars, MPV models, SUVs and other models. The function of the leg rest is to enable the rider to obtain the desired comfort by increasing the support area for the rider's legs. In the publicly disclosed Chinese patent documents, there is no lack of technical information related to the aforementioned automobile seat leg rests. For example, CN117465318A recommends "a seat leg rest adjustment structure, rear seat and automobile", CN117549807A provides "a leg rest adjustment device", CN215204578U introduces "an automobile seat leg rest", and CN118288877A discloses "an adjustable leg rest for an automobile seat", etc.

[0003] According to professional common sense, if a rider wants to obtain a relatively better or even the best support area for their legs to reflect the ultimate comfort as much as possible, it is usually achieved by adjusting the driver of the leg rest structure system. Specifically, the driver drives a fixed block through a screw or a similar component, and the fixed block drives a support plate to move (forward or backward) along a pair of guide rails to the required degree. When the support plate moves forward, the support area for the legs increases, and vice versa. For this, reference can be made to the "seat thigh rest extension mechanism" disclosed in CN217792149U (paragraphs 0023 to 0029 of the specification of this patent).

[0004] As is known in the industry, due to the aforementioned seat leg rest undergoing adaptive changes during the adjustment process, i.e., when adjusting forward or backward, the car seat cover will also change adaptively. Therefore, in order to meet the adaptive changes of the seat cover, a seat cover tightening device (also known as "seat cover pre-tightening device") is usually provided for the car seat leg rest. Technical information related to seat cover tightening devices can also be found in the publicly available Chinese patent literature. Typically, such as the "Automobile Seat Cover Fixing Structure" taught by CN203902339U, and more typically, the "A Seat Cover Pre-tightening Mechanism" announced in CN217515027U. This patent mentions the deficiencies of using a traction belt, such as the hanging belt mentioned in CN203902339U, in its background technology section. Thus, the structure it provides can objectively achieve the technical effects summarized in paragraph 0012 of its specification. However, the aforementioned CN217515027U still has the following drawbacks: Firstly, due to the influence of traditional design thinking, the bracket used to fix the seat leg rest is formed into an integral long strip structure extending from one end to the other end. As a result, the seat cover tightening device lacks adaptability to different vehicle models. Because the seat widths of different vehicle models, such as luxury cars, MPVs, SUVs, etc. produced by different brands and different manufacturers as mentioned above, are not the same. Consequently, there are corresponding differences in the lengths of the seat cover, the leg rest, and the brackets of the structure system of the seat cover tightening device. Therefore, only brackets of corresponding sizes can be equipped for different car seats.It can be seen therefrom that due to the lack of generality of the bracket, it is easy to have a situation of overstocking inventory where there is more of one and less of another, or more of the other and less of this. On the one hand, it increases the difficulty of warehousing management and the workload of management for parts by the manufacturer. On the other hand, there is a risk of wasting resources. Because once a certain model or brand of car stops production or changes its specifications, the corresponding seat cover tightening device becomes overstocked and may even have to be scrapped. Second, since each of the two bending pieces formed at both ends of the bracket, namely the left end and the right end, is respectively in abutment with the outer sides of the longitudinal bending parts at both ends of the tightening rod (referred to as the second winding wire in the patent), once the tightening rod moves left or right during actual use, it will get out of the control of the bending pieces, resulting in the entire seat cover tightening device losing its function, that is, losing the control function over the extreme position of the second winding wire as referred to in the patent. Third, since a first winding wire in the shape of a ┌ is provided on the left bending piece of the pair of bending pieces, the upper end (horizontal section) of the first winding wire passes through the bending piece and is sleeved with a bushing for setting a torsion spring (referred to as a "coil spring" in the patent), and the lower end (longitudinal section) of the first winding wire is fixedly connected to the left end of the aforementioned tightening rod. However, this structural design increases the number of parts and makes the structure tend to be complicated on the one hand. On the other hand, due to the many action transmission links, it affects the response speed of the tightening rod's action. Moreover, it makes the acting forces of a pair of torsion springs (referred to as "coil springs" in the patent) on the tightening rod unbalanced or inconsistent. Fourth, since the bushing for setting the torsion spring (i.e., the shaft sleeve, the same hereinafter) is sleeved on the bending part without control, the bushing will have an unwanted rotation situation. Because frequent rotation of the bushing will cause wear and affect the normal exertion of the function of the torsion spring (referred to as a "coil spring" in the patent). Based on the foregoing situation, it is necessary to make improvements. The technical solution to be introduced below was generated under this background. Summary of the Invention

[0005] The primary task of the present invention is to provide a seat cover tightening device for an automotive seat leg rest that helps make the bracket have good generality for the leg rests of different vehicle models, thus avoiding waste of resources and eliminating the confusion in the logistics links including warehousing.

[0006] Another task of the present invention is to provide a seat cover tightening device for an automotive seat leg rest that is conducive to fully ensuring the reliable control effect of the bending piece on the extreme position degree of the tightening rod, thereby eliminating the situation where the tightening rod breaks free from the bending piece.

[0007] Another task of the present invention is to provide a seat cover tightening device for an automotive seat leg rest that is beneficial to abandoning unnecessary redundant components, thus simplifying the structure, reducing the action transmission links, and ensuring the balance effect of the acting forces of the torsion springs on both ends of the tightening rod.

[0008] Another task of the utility model is to provide a seat cover tightening device matched with a leg support of a car seat, which is convenient for forming a good matching relationship between the shaft sleeve for setting the torsion spring and the bending piece to prevent the shaft sleeve from rotating and ensure that the torsion spring can play a role stably and reliably.

[0009] In order to embody the primary task of completing the present invention, the present invention provides a technical solution: a seat cover tightening device matched with a leg rest of a car seat, comprising a bracket, characterized in that the bracket is composed of a left fixing plate and a right fixing plate of the leg rest which are independent of each other and correspond to each other, and in use, the left fixing plate of the leg rest and the right fixing plate of the leg rest are fixed to the leg rest of the car seat in a state of left-right correspondence with each other, and a left bending piece is folded downward on the left side of the left fixing plate of the leg rest, and a right bending piece is folded downward on the right side of the right fixing plate of the leg rest, and the left and right bending pieces correspond to each other.

[0010] In order to accomplish another task of the utility model, the technical solution provided by the utility model is: a tightening rod is arranged below the bracket, and a left horizontal folding arm of the tightening rod parallel to the left end of the tightening rod is folded and extended at the upper left end of the tightening rod, and a right horizontal folding arm of the tightening rod parallel to the right end of the tightening rod is folded and extended at the upper right end of the tightening rod, the left and right horizontal folding arms of the tightening rod are opposite to each other, and the left horizontal folding arm of the tightening rod extends from the left side of the left bending piece through the left bending piece to the right side of the left bending piece, and the right horizontal folding arm of the tightening rod extends from the right side of the right bending piece through the right bending piece to the left side of the right bending piece, the lower end of the left bending piece corresponds to the front side surface of the left end of the tightening rod, and the lower end of the right bending piece corresponds to the front side surface of the right end of the tightening rod.

[0011] In order to embody another task of the utility model, the technical solution provided by the utility model is: a tightening rod left horizontal folding arm clearance hole is opened on the left bending piece, and the tightening rod left horizontal folding arm extends to the right side of the left bending piece through the tightening rod left horizontal folding arm clearance hole and corresponds to the bottom of the left fixed plate of the leg support; a tightening rod right horizontal folding arm clearance hole is opened on the right bending piece, and the tightening rod right horizontal folding arm extends to the left side of the right bending piece through the tightening rod right horizontal folding arm clearance hole and corresponds to the bottom of the right fixed plate of the leg support.

[0012] To achieve another object of the present utility model, the technical solution provided by the present utility model is as follows: On the hole wall of the left horizontal folding arm relief hole of the tightening rod, at least a pair of anti-pivoting flange embedding grooves are provided. A left torsion spring shaft sleeve is sleeved on the left horizontal folding arm of the tightening rod. A left torsion spring shaft sleeve limiting plate is fixed to the left end of the left torsion spring shaft sleeve. On the left side of the left torsion spring shaft sleeve limiting plate and at a position corresponding to the left horizontal folding arm relief hole of the tightening rod, a left bending piece fitting seat is formed. The left bending piece fitting seat is matched with the left horizontal folding arm relief hole of the tightening rod. At the junction on the left side of the left bending piece fitting seat and the left torsion spring shaft sleeve limiting plate, at least a pair of spaced-apart anti-pivoting flanges corresponding to the anti-pivoting flange embedding grooves in position are formed. The anti-pivoting flange is embedded and matched with the anti-pivoting flange embedding groove; On the hole wall of the right horizontal folding arm relief hole of the tightening rod, at least a pair of anti-rotation flange embedding grooves are provided. A right torsion spring shaft sleeve is sleeved on the right horizontal folding arm of the tightening rod. A right torsion spring shaft sleeve limiting plate is fixed to the right end of the right torsion spring shaft sleeve. On the right side of the right torsion spring shaft sleeve limiting plate and at a position corresponding to the right horizontal folding arm relief hole of the tightening rod, a right bending piece fitting seat is formed. The right bending piece fitting seat is matched with the right horizontal folding arm relief hole of the tightening rod. At the junction on the right side of the right bending piece fitting seat and the right torsion spring shaft sleeve limiting plate, at least a pair of spaced-apart anti-rotation flanges corresponding to the anti-rotation flange embedding grooves in position are formed. The anti-rotation flange is embedded and matched with the anti-rotation flange embedding groove.

[0013] In a specific embodiment of the present utility model, a left torsion spring is sleeved on the left torsion spring shaft sleeve. The first torsion spring leg of the left torsion spring is hooked on the upper rear side of the left bending piece, and the second torsion spring leg of the left torsion spring is hooked on the left end of the tightening rod. A right torsion spring is sleeved on the right torsion spring shaft sleeve. The first torsion spring leg of the right torsion spring is hooked on the upper rear side of the right bending piece, and the second torsion spring leg of the right torsion spring is hooked on the right end of the tightening rod.

[0014] In another specific embodiment of the present utility model, a left bending piece buffer sleeve is sleeved at the lower end of the left bending piece and at a position corresponding to the front side of the left end of the tightening rod. A right bending piece buffer sleeve is sleeved at the lower end of the right bending piece and at a position corresponding to the front side of the right end of the tightening rod.

[0015] In yet another specific embodiment of the present utility model, at the end of the left bending piece and at a position corresponding to the lower side of the left bending piece buffer sleeve, a left bending piece buffer sleeve anti-detachment extension part for preventing the left bending piece buffer sleeve from detaching from the lower end of the left bending piece is formed by expansion. At the end of the right bending piece and at a position corresponding to the lower side of the right bending piece buffer sleeve, a right bending piece buffer sleeve anti-detachment extension part for preventing the right bending piece buffer sleeve from detaching from the lower end of the right bending piece is formed by expansion.

[0016] In another specific embodiment of the present invention, the left bending piece buffer sleeve and the right bending piece buffer sleeve are natural rubber sleeves, styrene-butadiene rubber sleeves, butadiene rubber sleeves, chloroprene rubber sleeves or nitrile rubber sleeves.

[0017] In another specific embodiment of the utility model, a pair of leg support left fixing plate fastener holes for fixing to the car seat leg support are respectively opened at the upper front and rear of the left leg support fixing plate, and a pair of leg support right plate fastener holes for fixing to the car seat leg support are respectively opened at the upper front and rear of the right leg support fixing plate.

[0018] In a more specific embodiment of the present invention, the cross-sectional shape of the left fixing plate of the leg support and the right fixing plate of the leg support are both continuous double Z-shaped structures for increasing strength.

[0019] One of the technical effects of the technical solution provided by the utility model is that, because the bracket is innovatively designed to be composed of left and right fixing plates of the leg support under the prejudice of the conventional design concept in the prior art, it helps to make the bracket have good versatility for the leg supports of different models, thereby avoiding waste of resources and eliminating confusion in the logistics links including warehousing, and facilitating management without confusion in specifications; secondly, because the left and right bending pieces are changed from the L-shaped structure in the prior art to the state of extended arms and the lower ends are directly corresponding to the front side surfaces of the left and right ends of the tightening rod respectively, it is conducive to fully ensuring the reliable control effect of the left and right bending pieces on the extreme position degree of the tightening rod; thirdly, because the left and right horizontal arms of the tightening rod can be respectively extended from the left and right bending pieces opened on the left and right bending pieces The left and right horizontal bending arms of the tightening rod are inserted into the clearance holes and correspond to the lower parts of the left and right fixed plates of the leg support in a facing state, thereby eliminating redundant components such as the first winding wire compared to the prior art, which is beneficial to reducing the action transmission links and ensuring the balanced effect of the torsion spring on the two ends of the tightening rod; fourthly, since the left and right torsion spring sleeves are respectively matched with the anti-pivot flange embedding groove and the anti-rotation flange on the left and right bending piece matching seats formed on the left and right torsion spring sleeve limiting plates, it is convenient to form a good matching relationship between the left and right torsion spring sleeves and the left and right bending pieces for respectively setting the left and right torsion springs, thereby preventing the left and right torsion spring sleeves from being worn due to rotation and ensuring that the left and right torsion springs can function stably and reliably. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an assembly structure diagram of the utility model;

[0021] Figure 2 for Figure 1 Schematic diagram after assembly;

[0022] Figure 3 This is a schematic diagram of an application example of the present utility model. Detailed implementation manners

[0023] In order to more clearly understand the technical essence and beneficial effects of the present utility model, the applicant will make a detailed description below in the form of embodiments. However, the description of the embodiments is not a limitation on the solution of the present utility model. Any formal but non-substantive equivalent transformation made based on the concept of the present utility model should be regarded as falling within the scope of the technical solution of the present utility model.

[0024] In the following description, all directional or positional concepts such as up, down, left, right, front and back, unless otherwise specifically stated for Figure 3 are based on the current position state, and thus cannot be understood as a special limitation on the technical solution provided by the present utility model. Figure 1 Please refer to

[0025] and Figure 1 and Figure 2 , which shows a bracket 1 of the structural system of the seat cover tightening device for matching with the leg rest of an automotive seat according to the present utility model.

[0026] As the technical key points or design points of the technical solution provided by the present utility model: the aforementioned bracket 1 is composed of a left leg rest fixing plate 11 and a right leg rest fixing plate 12 that are independent of each other and correspond to each other. In the use state, the left leg rest fixing plate 11 and the right leg rest fixing plate 12 are fixed to the automotive seat leg rest 10 ( Figure 3 shown) in a left-right corresponding state to each other, and a left bending piece 111 is folded and extended downward on the left side of the left leg rest fixing plate 11, and a right bending piece 121 is folded and extended downward on the right side of the right leg rest fixing plate 12. The left and right bending pieces 111 and 121 correspond to each other.

[0027] As shown by Figure 1 and Figure 2 , the left end of the aforementioned left leg rest fixing plate 11 is formed with a left fixing plate arc transition wall 115, and the right end of the aforementioned right leg rest fixing plate 12 is formed with a right fixing plate arc transition wall 125. The left and right fixing plate arc transition walls 115 and 125 can enhance the fitting and positioning effect with the automotive seat leg rest 10.

[0028] From the above description, it can be seen that since this application breaks away from the shackles of the traditional design concept and innovatively divides the integral long strip bracket in the existing technology into two parts, that is, the bracket 1 is jointly composed of the left and right leg rest fixing plates 11 and 12, one of the technical effects recorded by the applicant in the technical effect column above is objectively realized.

[0029] Continue to refer toFigure 1 and Figure 2 Below the corresponding bracket 1, a tightening rod 2 is provided. At the upper part of the left end of the tightening rod 2, a left horizontal folding arm 21 of the tightening rod parallel to the left end of the tightening rod 2 is folded and extended. At the upper part of the right end of the tightening rod 2, a right horizontal folding arm 22 of the tightening rod parallel to the right end of the tightening rod 2 is folded and extended. The left and right horizontal folding arms 21 and 22 of the tightening rod correspond to each other. The left horizontal folding arm 21 of the tightening rod passes through the left bending piece 111 from the left side of the left bending piece 111 and extends to the right side of the left bending piece 111, while the right horizontal folding arm 22 of the tightening rod passes through the right bending piece 121 from the right side of the right bending piece 121 and extends to the left side of the right bending piece 121. The lower end of the left bending piece 111 corresponds to the front side of the left end of the tightening rod 2, and the lower end of the right bending piece 121 corresponds to the front side of the right end of the tightening rod 2.

[0030] In this embodiment, since an arc transition wall 115 of the left fixing plate is formed at the left end of the left leg support fixing plate 11, the left bending piece 111 is actually formed by extending downward from the front end of the arc transition wall 115 of the left fixing plate. By the same token, since a right fixing plate arc transition wall 125 is formed at the right end of the right leg support fixing plate 12, the right bending piece 121 is substantially formed by extending downward from the front end of the right fixing plate arc transition wall 125.

[0031] As can be seen from the above description, compared with the prior art, the present application can objectively reflect the second technical effect recorded by the applicant in the technical effect column above.

[0032] Continue to see Figure 1 and Figure 2 On the left bending piece 111, a relief hole 1111 for the left horizontal folding arm of the tightening rod is provided. The left horizontal folding arm 21 of the tightening rod passes through the relief hole 1111 for the left horizontal folding arm of the tightening rod and extends to the right side of the left bending piece 111 and corresponds to the lower part of the left leg support fixing plate 11; on the right bending piece 121, a relief hole 1211 for the right horizontal folding arm of the tightening rod is provided. The right horizontal folding arm 22 of the tightening rod passes through the relief hole 1211 for the right horizontal folding arm of the tightening rod and extends to the left side of the right bending piece 121 and corresponds to the lower part of the right leg support fixing plate 12. This structural design of the present utility model can eliminate the first winding wire and other components in the prior art mentioned in the background art column and can be considered redundant components, so it also objectively realizes the third technical effect recorded in the background art column above.

[0033] Then see Figure 1 and Figure 2, on the inner wall of the left horizontal folding arm relief hole 1111 of the tightening rod, a pair of anti-pivoting flange embedding grooves 11111 are provided, which are spaced 180° from each other in the circumferential direction around the left horizontal folding arm relief hole 1111 of the tightening rod. A left torsion spring bushing 3 is sleeved on the left horizontal folding arm 21 of the tightening rod. A left torsion spring bushing limiting plate 31 is fixed to the left end of the left torsion spring bushing 3. On the left side of the left torsion spring bushing limiting plate 31 and at a position corresponding to the left horizontal folding arm relief hole 1111 of the tightening rod, a left bending piece mating seat 311 is formed. The left bending piece mating seat 311 cooperates with the left horizontal folding arm relief hole 1111 of the tightening rod. At the junction of the left bending piece mating seat 311 and the left side of the left torsion spring bushing limiting plate 31, a pair of spaced-apart anti-pivoting flanges 3111 are formed, the number of which is equal to that of the anti-pivoting flange embedding grooves 11111, and the positions of which correspond to those of the anti-pivoting flange embedding grooves 11111. The anti-pivoting flanges 3111 are embedded with the anti-pivoting flange embedding grooves 11111. On the inner wall of the right horizontal folding arm relief hole 1211 of the tightening rod, a pair of anti-rotation flange embedding grooves 12111 are provided, which are spaced 180° from each other in the circumferential direction around the right horizontal folding arm relief hole 1211 of the tightening rod. A right torsion spring bushing 4 is sleeved on the right horizontal folding arm 22 of the tightening rod. A right torsion spring bushing limiting plate 41 is fixed to the right end of the right torsion spring bushing 4. On the right side of the right torsion spring bushing limiting plate 41 and at a position corresponding to the right horizontal folding arm relief hole 1211 of the tightening rod, a right bending piece mating seat 411 is formed. The right bending piece mating seat 411 cooperates with the right horizontal folding arm relief hole 1211 of the tightening rod. At the junction of the right bending piece mating seat 411 and the right side of the right torsion spring bushing limiting plate 41, a pair of spaced-apart anti-rotation flanges 4111 are formed, the number of which is equal to that of the anti-rotation flange embedding grooves 12111, and the positions of which correspond to those of the anti-rotation flange embedding grooves 12111. The anti-rotation flanges 4111 are embedded with the anti-rotation flange embedding grooves 12111.

[0034] The applicant needs to explain that: the number of the anti-pivoting flange embedding grooves 11111 may also be three spaced 120° from each other or four spaced 90° from each other in the circumferential direction around the left horizontal folding arm relief hole 1111 of the tightening rod. Correspondingly, the number of the anti-pivoting flanges 3111 as compensation is three spaced 120° from each other or four spaced 90° from each other. Therefore, the present invention cannot be limited by the number of the anti-pivoting flange embedding grooves 11111 and the anti-pivoting flanges 3111 engaged therewith, whether the number is more or less or increased or decreased. Since the number of the anti-rotation flange embedding grooves 12111 and the number of the anti-rotation flanges 4111 engaged therewith are the same as the above, the applicant will not repeat them here.

[0035] As can be seen from the above description, the structure of the present application objectively achieves the fourth technical effect recorded in the technical effect column above.

[0036] Continue to see Figure 1 and Figure 2 A left torsion spring 5 is sleeved on the aforementioned left torsion spring bushing 3. The first torsion spring foot 51 of the left torsion spring 5 is hooked on the upper rear side of the aforementioned left bent piece 111, and the second torsion spring foot 52 of the left torsion spring 5 is hooked on the left end of the aforementioned tightening rod 2. A right torsion spring 6 is sleeved on the aforementioned right torsion spring bushing 4. The first torsion spring foot 61 of the right torsion spring 6 is hooked on the upper rear side of the aforementioned right bent piece 121, and the second torsion spring foot 62 of the right torsion spring 6 is hooked on the right end of the aforementioned tightening rod 2.

[0037] From Figure 1 and Figure 2 As shown, a left bent piece buffer sleeve 112 is fixedly sleeved at the lower end of the aforementioned left bent piece 111 and at a position corresponding to the front side of the left end of the aforementioned tightening rod 2. A right bent piece buffer sleeve 122 is fixedly sleeved at the lower end of the aforementioned right bent piece 121 and at a position corresponding to the front side of the right end of the aforementioned tightening rod 2.

[0038] An anti-drop extension part 113 of the left bent piece buffer sleeve for preventing the left bent piece buffer sleeve 112 from falling off the lower end of the left bent piece 111 is formed by expanding at the end of the aforementioned left bent piece 111 and at a position corresponding to the lower part of the aforementioned left bent piece buffer sleeve 112. An anti-drop extension part 123 of the right bent piece buffer sleeve for preventing the right bent piece buffer sleeve 122 from falling off the lower end of the right bent piece 121 is formed by expanding at the end of the aforementioned right bent piece 121 and at a position corresponding to the lower part of the aforementioned right bent piece buffer sleeve 122.

[0039] In this embodiment, the aforementioned left bent piece buffer sleeve 112 and right bent piece buffer sleeve 122 are natural rubber sleeves with good impact resistance, wear resistance, anti-aging and other properties, but styrene-butadiene rubber sleeves, butadiene rubber sleeves, chloroprene rubber sleeves or nitrile rubber sleeves can also be used.

[0040] From Figure 1 and Figure 2 As shown, a pair of leg rest left fixing plate fastener holes 114 for fixing with the aforementioned vehicle seat leg rest 10 ( Figure 3 shown) are respectively opened in the front and rear of the upper part of the aforementioned leg rest left fixing plate 11. A pair of leg rest right plate fastener holes 124 for fixing with the aforementioned vehicle seat leg rest 10 are respectively opened in the front and rear of the upper part of the aforementioned leg rest right fixing plate 12.

[0041] In order to enhance the strength of the aforementioned leg rest left fixing plate 11 and leg rest right fixing plate 12, the cross-sectional shapes of the leg rest left and right fixing plates 11 and 12 are both in a continuous double-Z shape structure for increasing strength.

[0042] Please refer to Figure 3 and in combination with Figure 1 and Figure 2 , Figure 3 which shows the above-mentioned leg rest 10 of the vehicle seat. The left leg rest fixing plate 11 is fixed to the bottom of the leg rest 10 of the vehicle seat by the first bolt Ⅰ7a as a fastener at a position corresponding to the aforementioned fastener hole 114 of the left leg rest fixing plate, and the right leg rest fixing plate 12 is fixed to the bottom of the leg rest 10 of the vehicle seat by the second bolt Ⅱ7b at a position corresponding to the aforementioned fastener hole 115 of the right leg rest fixing plate. The applicant needs to explain that: Figure 3 The position state shown is opposite to that of Figure 1 , Figure 2 , that is, it is rotated by 180°.

[0043] Since the function of the leg rest 10 of the vehicle seat belongs to the common knowledge in the art, and the specific usage method can also be well understood by reading the relatively typical Chinese patents CN217792149U (a seat thigh rest extension mechanism), CN214112361U (a telescopic seat leg rest), and CN203557986U (a vehicle seat leg rest adjustment mechanism), the applicant only makes the following brief description.

[0044] In the initial state, that is, when the leg rest 10 of the vehicle seat has not been moved forward towards the occupant, the left and right bending piece buffer sleeves 112 and 122 at the lower parts of the aforementioned left and right bending pieces 111 and 121 are in contact with the tightening rod 2 to limit the tightening rod 2. When the occupant needs to displace the leg rest 10 of the vehicle seat forward to the position state shown in Figure 3 , then the occupant toggles the switch button or push-button switch provided on the armrest or other reasonable positions (but usually on the armrest). The driver shown in the figure but not shown and revealed in CN217792149U operates. The driver drives the support plate to slide forward through the screw and the fixing block, so that the leg rest 10 of the vehicle seat displaces forward (taking the position state shown in Figure 3 as an example) against the reaction forces of the left and right torsion springs 5 and 6, thereby increasing the contact area with the thigh of the occupant. When the forward displacement reaches the extent expected by the occupant, the operation of the aforementioned switch button is stopped. If it is necessary to displace the leg rest 10 of the vehicle seat that is in the forward displacement backward, then the switch button can be operated in the aforementioned opposite direction.

[0045] The situation of enabling the leg rest 10 of the vehicle seat is not necessarily specifically targeted at tall people, that is, it does not depend on the height of the human body. As long as it aims to obtain the comfort of increasing the leg support area, it can be enabled. Of course, for tall people, the probability of enabling is higher. In situations such as impacts caused by braking or jolting, the aforementioned left and right bending pieces 111 and 121 of the present utility model can play a limiting role in blocking the tightening rod 2, and the aforementioned left and right bending piece buffer sleeves 112 and 122 play a buffering role.

[0046] In summary, the technical solution provided by the present utility model makes up for the deficiencies in the prior art, successfully completes the invention task, and faithfully realizes the technical effects described by the applicant in the technical effect column above.

Claims

1. A seat cover tightening device for matching with a leg rest of an automobile seat, comprising a bracket (1), characterized in that: The bracket (1) is composed of a left leg support fixing plate (11) and a right leg support fixing plate (12) which are independent of each other and correspond to each other. In a state of use, the left leg support fixing plate (11) and the right leg support fixing plate (12) are fixed to the vehicle seat leg support (10) in a state of left-right correspondence with each other, and a left bending piece (111) is folded downward on the left side of the left leg support fixing plate (11), and a right bending piece (121) is folded downward on the right side of the right leg support fixing plate (12), and the left and right bending pieces (111, 121) correspond to each other.

2. The seat cover tightening device for matching with the leg rest of an automobile seat according to claim 1, characterized in that: A tightening rod (2) is arranged below the bracket (1), a tightening rod left horizontal folding arm (21) parallel to the left end of the tightening rod (2) is folded out at the upper left end of the tightening rod (2), and a tightening rod right horizontal folding arm (22) parallel to the right end of the tightening rod (2) is folded out at the upper right end of the tightening rod (2), the left and right horizontal folding arms (21, 22) of the tightening rod are opposite to each other, and the tightening rod left horizontal folding arm (21) is extended from the left end of the tightening rod (2) to the right end of the tightening rod (2). The left side of the bending piece (111) passes through the left bending piece (111) and extends to the right side of the left bending piece (111), and the right horizontal folding arm (22) of the tightening rod passes through the right bending piece (121) from the right side of the right bending piece (121) and extends to the left side of the right bending piece (121), the lower end of the left bending piece (111) corresponds to the left front side of the tightening rod (2), and the lower end of the right bending piece (121) corresponds to the right front side of the tightening rod (2).

3. The seat cover tightening device for matching with the leg rest of an automobile seat according to claim 2, wherein: A tightening rod left horizontal folding arm clearance hole (1111) is provided on the left bending piece (111), and the tightening rod left horizontal folding arm (21) extends to the right side of the left bending piece (111) through the tightening rod left horizontal folding arm clearance hole (1111) and corresponds to the bottom of the left fixed plate (11) of the leg support; a tightening rod right horizontal folding arm clearance hole (1211) is provided on the right bending piece (121), and the tightening rod right horizontal folding arm (22) extends to the left side of the right bending piece (121) and corresponds to the bottom of the right fixed plate (12) of the leg support through the tightening rod right horizontal folding arm clearance hole (1211).

4. The seat cover tightening device for matching with the leg rest of an automobile seat according to claim 3, characterized in that: At least one pair of anti-pivoting flange embedding grooves (11111) are provided on the wall of the left horizontal folding arm clearance hole (1111) of the tightening rod, a left torsion spring shaft sleeve (3) is sleeved on the left horizontal folding arm (21) of the tightening rod, a left torsion spring shaft sleeve limiting plate (31) is fixed on the left end of the left torsion spring shaft sleeve (3), and a left bending spring shaft sleeve is formed on the left side of the left torsion spring shaft sleeve limiting plate (31) and at a position corresponding to the clearance hole (1111) of the left horizontal folding arm of the tightening rod. A sheet matching seat (311), the left bending sheet matching seat (311) matches with the left horizontal bending arm clearance hole (1111) of the tightening rod, and at the junction of the left bending sheet matching seat (311) and the left side of the left torsion spring sleeve limiting plate (31), at least one pair of anti-pivot flanges (3111) spaced from each other and located corresponding to the anti-pivot flange embedding groove (11111) is formed, and the anti-pivot flanges (3111) are embedded with the anti-pivot flange embedding groove (11111); At least one pair of anti-rotation flange embedding grooves (12111) are provided on the wall of the right horizontal folding arm clearance hole (1211) of the tightening rod, a right torsion spring shaft sleeve (4) is sleeved on the right horizontal folding arm (22) of the tightening rod, a right torsion spring shaft sleeve limiting plate (41) is fixed on the right end of the right torsion spring shaft sleeve (4), and a right bending spring shaft sleeve is formed on the right side of the right torsion spring shaft sleeve limiting plate (41) and at a position corresponding to the right horizontal folding arm clearance hole (1211) of the tightening rod. The right bending piece matching seat (411) matches with the right horizontal bending arm clearance hole (1211) of the tightening rod, and at the junction of the right bending piece matching seat (411) and the right side of the right torsion spring sleeve limiting plate (41) there is at least one pair of anti-rotation flanges (4111) spaced from each other and corresponding in position to the anti-rotation flange embedding groove (12111), and the anti-rotation flanges (4111) are embedded in the anti-rotation flange embedding groove (12111).

5. The seat cover tightening device for matching with the leg rest of an automotive seat according to claim 4, characterized in that: A left torsion spring (5) is sleeved on the left torsion spring sleeve (3), a first torsion spring leg (51) of the left torsion spring (5) is hooked on the upper rear part of the left bending piece (111), and a second torsion spring leg (52) of the left torsion spring (5) is hooked on the left end of the tightening rod (2); a right torsion spring (6) is sleeved on the right torsion spring sleeve (4), a first torsion spring leg (61) of the right torsion spring (6) is hooked on the upper rear part of the right bending piece (121), and a second torsion spring leg (62) of the right torsion spring (6) is hooked on the right end of the tightening rod (2).

6. The seat cover tightening device for matching with the leg rest of an automobile seat according to claim 2, wherein: A left bending sheet buffer sleeve (112) is sleeved on the lower end of the left bending sheet (111) and at a position corresponding to the left front side of the tightening rod (2), and a right bending sheet buffer sleeve (122) is sleeved on the lower end of the right bending sheet (121) and at a position corresponding to the right front side of the tightening rod (2).

7. The seat cover tightening device for matching with the leg rest of an automobile seat according to claim 6, wherein: An anti-detachment extension portion (113) of the left folding piece buffer sleeve for preventing the left folding piece buffer sleeve (112) from falling off the lower end of the left folding piece (111) is formed by expanding at the end of the left folding piece (111) and at a position corresponding to the lower part of the left folding piece buffer sleeve (112). An anti-detachment extension portion (123) of the right folding piece buffer sleeve for preventing the right folding piece buffer sleeve (122) from falling off the lower end of the right folding piece (121) is formed by expanding at the end of the right folding piece (121) and at a position corresponding to the lower part of the right folding piece buffer sleeve (122).

8. The seat cover tightening device for matching with the leg rest of an automobile seat according to claim 6 or 7, characterized in that: The left folding piece buffer sleeve (112) and the right folding piece buffer sleeve (122) are natural rubber sleeves, styrene-butadiene rubber sleeves, butadiene rubber sleeves, neoprene rubber sleeves or nitrile rubber sleeves.

9. The seat cover tightening device for matching with the leg rest of an automobile seat according to claim 1, characterized in that: A pair of leg rest left fixing plate fastener holes (114) for fixing to the vehicle seat leg rest (10) are respectively formed in the front and rear of the upper part of the leg rest left fixing plate (11). A pair of leg rest right plate fastener holes (124) for also fixing to the vehicle seat leg rest (10) are respectively formed in the front and rear of the upper part of the leg rest right fixing plate (12).

10. The seat cover tightening device for matching with the leg rest of an automobile seat according to claim 1 or 3 or 9, characterized in that: The cross-sectional shapes of the leg rest left fixing plate (11) and the leg rest right fixing plate (12) are both continuous double-Z-shaped structures for increasing strength.

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