Extended anti-pinch leg mechanism and stretching device

Abstract

The utility model discloses an extended anti-pinch leg mechanism and an extension device. The extension type anti-pinch leg mechanism comprises a first leg connecting rod, a second leg connecting rod pivoted to the first leg connecting rod, a third leg connecting rod pivoted to the second leg connecting rod, a fourth leg connecting rod pivoted to the third leg connecting rod, a third leg connecting rod pivoted to the fourth leg connecting rod, a large footrest mounting piece pivoted to the first footrest connecting rod, and a small footrest mounting piece pivoted to the first footrest connecting rod. The large footrest mounting piece, the first footrest connecting rod, the second footrest connecting rod and the small footrest mounting piece form a quadrilateral structure, a baffle is arranged at the front end of the large footrest mounting piece, a protruding portion is arranged at the rear end of the first footrest connecting rod, and the protruding portion is in pivot joint with a third footrest connecting rod through a first shaft. The rear end of the third footrest connecting rod is pivoted with a fourth leg connecting rod through a second shaft, and the outer side of the second shaft is sleeved with a lining located between the third footrest connecting rod and the fourth leg connecting rod. The problem that certain potential safety hazards exist in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of home furnishing manufacturing, and in particular to an extended anti-pinch hand and leg mechanism and extension device. Background Technology

[0002] like Figures 1-2 The diagram shows the leg mechanism of an existing extension device. When opened, it creates three large gaps. The gap on the left is formed by the quadrilateral structure consisting of the large foot a, connecting rod one b, connecting rod two c, and small foot d when unfolded. The middle gap is a clearance hole a1 on the large foot, used to allow the pivot shaft of connecting rod two and connecting rod three e to pass. The gap on the right is the gap between the large foot and connecting rod three. This gap is formed because the distance between the first shaft f and the second shaft g is relatively short. The right end of connecting rod three cannot be directly punched to form a countersunk platform to pivot with connecting rod four h. It must bend outward to make room for connecting rod four to pivot properly with the large foot. At the same time, the large foot needs to have a notch a2 to allow the relative movement of the right end of connecting rod three. This results in a large gap between the large foot, connecting rod three, and connecting rod four when the leg mechanism is fully unfolded. If a finger is inserted into any gap without the user's knowledge, it could easily pinch the finger when the leg mechanism is retracted, posing a certain safety hazard. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an extended anti-pinch hand and leg mechanism that can eliminate safety hazards.

[0004] To achieve the above objectives, the technical solution adopted by the extended anti-pinch hand and leg mechanism of this utility model is as follows:

[0005] An extended anti-pinch leg mechanism includes a leg link 1, a leg link 2 pivotally connected to the front end of the leg link 1, a leg link 3 pivotally connected to the rear end of the leg link 2, a leg link 4 pivotally connected to the front end of the leg link 3, a large footrest mounting component pivotally connected to the front end of the leg links 3 and 4, a footrest link 1 pivotally connected to the middle of the large footrest mounting component, a small footrest mounting component pivotally connected to the front end of the footrest link 1, a footrest link 2 pivotally connected to the middle of the small footrest mounting component, and a footrest link 2 pivotally connected to the rear end of the footrest link 2. The large footrest mounting component, the footrest link 1, the footrest link 2, and the small footrest mounting component are all included. The quadrilateral structure is formed. The front end of the large foot support is equipped with a baffle to cover the gap formed when the quadrilateral structure is fully unfolded. The rear end of the foot support link one is equipped with a protrusion. The protrusion is pivotally connected to the foot support link three via shaft one. There is a gap between the end of shaft one and the large foot support. The rear end of the foot support link three is pivotally connected to the leg link four via shaft two. A bushing is sleeved on the outside of shaft two between the foot support link three and the leg link four. When the quadrilateral structure is fully unfolded, there is no gap between the large foot support, the foot support link three, and the leg link four when projected along the axis of shaft two.

[0006] Preferably, the large footrest mounting member comprises a large footrest mounting plate pivoted with the leg connecting rod three and four, a front end of the large footrest mounting plate is fixedly connected with an extension plate, the footrest connecting rod one and two are pivoted with the extension plate, and the baffle is arranged at the front end of the extension plate.

[0007] Preferably, the baffle is integrally formed with the extension plate.

[0008] Preferably, a first limiting pin is arranged at the middle part of the extension plate, the footrest connecting rod one is provided with a first limiting surface matched with the first limiting pin, and the footrest connecting rod two is provided with a second limiting surface matched with the first limiting pin.

[0009] Preferably, the footrest connecting rod three is in a straight strip shape.

[0010] Preferably, a second limiting pin is arranged at the front side of the leg connecting rod three, and the leg connecting rod two is provided with a third limiting surface and a fourth limiting surface matched with the second limiting pin.

[0011] To achieve the above-mentioned purpose, the technical scheme of the stretching device of the extension type hand and leg anti-pinch mechanism is as follows:

[0012] A stretching device, comprising a bottom rod, a seat mechanism is arranged on the bottom rod, the seat mechanism comprises a front mounting member and a rear mounting member, one end of the front mounting member is pivoted to the front part of the bottom rod, the other end is pivoted with a front rotating member one, the other end of the front rotating member one is pivoted with an assembly side plate, the middle part of the front mounting member is pivoted with a front rotating member two, the other end of the front rotating member two is pivoted with an intermediate rotating member, the middle part of the intermediate rotating member is pivoted with the assembly side plate, the other end of the intermediate rotating member is pivoted with a front support rod, one end of the rear mounting member is pivoted to the rear part of the bottom rod, the other end is pivoted with a rear rotating member, the rear rotating member is pivoted with the assembly side plate, the rear rotating member is pivoted with a side connecting rod member, the other end of the side connecting rod member is pivoted to the middle part of the front rotating member one, the rear side of the assembly side plate is provided with a backrest mechanism, and the front side of the assembly side plate is provided with the extension type hand and leg anti-pinch mechanism.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] The gap formed after the quadrilateral structure constituted by the large footrest mounting piece, the footrest connecting rod one, the footrest connecting rod two and the small footrest mounting piece is fully unfolded is shielded by the baffle, so that the fingers cannot be inserted; the protruding part is arranged at the rear end of the footrest connecting rod one, the space is left, the shaft one is avoided from interfering with the large footrest mounting piece, that is, the avoiding hole is not needed to be arranged on the large footrest mounting piece, and the fingers cannot be inserted; the bushing with proper height is sleeved outside the shaft two, the thin gasket between the footrest connecting rod three and the leg connecting rod four is replaced, the spacing between the footrest connecting rod three and the leg connecting rod four is increased, the leg connecting rod four and the large footrest mounting piece are normally pivoted, the movement interference between the footrest connecting rod three and the large footrest mounting piece is not needed to be considered, so that the structure of the footrest connecting rod three can be simplified, when the leg mechanism is unfolded, the large footrest mounting piece, the footrest connecting rod three and the leg connecting rod four are projected along the axis of the shaft two, no gap is formed between the three, and the fingers cannot be inserted naturally. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the back view of the leg mechanism of the existing stretching device in the unfolded state.

[0016] Figure 2 is the front view of the leg mechanism of the existing stretching device in the unfolded state.

[0017] Figure 3 is the back view of the leg mechanism of the stretching device in the unfolded state.

[0018] Figure 4 is the front view of the leg mechanism of the stretching device in the unfolded state.

[0019] Figure 5 is the enlarged view of the leg mechanism of the stretching device.

[0020] Figure 6 is the back view of the leg mechanism of the stretching device in the folded state.

[0021] Figure 7 is the structure schematic view of the stretching device.

[0022] Figure 8 is the back view of the stretching device in the TV state.

[0023] Figure 9 is the front view of the stretching device in the TV state.

[0024] Wherein, a large rest, a1 avoid hole, a2 gap, b connecting rod one, c connecting rod two, d small rest, e connecting rod three, f first shaft, g second shaft, h connecting rod four, 1 extension type anti-pinch leg mechanism, 11 leg connecting rod one, 12 leg connecting rod two, 121 third limit surface, 122 fourth limit surface, 13 leg connecting rod three, 131 second limit pin, 14 leg connecting rod four, 15 large rest mounting piece, 151 large rest mounting plate, 1511 notch, 152 extension plate, 1521 baffle, 1522 first limit pin, 16 rest connecting rod one, 161 first limit surface, 162 convex part, 17 small rest mounting piece, 18 rest connecting rod two, 181 second limit surface, 19 rest connecting rod three, 191 shaft one, 192 shaft two, 193 bushing, 2 base, 3 seat mechanism, 31 front mounting piece, 32 rear mounting piece, 33 front rotating piece one, 34 assembly side plate, 35 front rotating piece two, 36 middle rotating piece, 37 front support rod, 38 rear rotating piece, 39 side connecting rod piece, 4 backrest mechanism, 41 backrest mounting plate, 42 rear support rod. DETAILED DESCRIPTION

[0025] The utility model will be further illustrated in connection with the drawings and specific embodiments, and it should be understood that these embodiments are only used for illustrating the utility model and are not used for limiting the scope of the utility model, and after reading the utility model, the modification of various equivalent forms of the utility model by the person skilled in the art falls within the range defined by the claims attached to the present application.

[0026] As Figures 3-9As shown, a kind of extended anti-pinch hand leg mechanism 1, including leg link one 11, the front end of leg link one is pivoted leg link two 12, the rear of leg link two is pivoted leg link three 13, the front side of leg link three is installed second limit pin 131, leg link two is set with the third limit surface 121 and fourth limit surface 122 of second limit pin cooperation, when second limit pin and third limit surface are in contact, leg mechanism is unfolded to extreme position, when second limit pin and fourth limit surface are in contact, leg mechanism is folded to extreme position, the front end of leg link three is pivoted leg link four 14, the front end of leg link three, four is pivoted big footrest mounting piece 15, big footrest mounting piece includes with the pivot of leg link three, four Big footrest mounting plate 151, the front end of big footrest mounting plate is fixed with extension plate 152, big footrest mounting piece is divided into big footrest mounting plate and extension plate two independent stamping parts, can improve material utilization, reduce cost, the rear end of extension plate is fixed with big footrest mounting plate, the rear side of extension plate is pivoted footrest link one 16, the front end of footrest link one is pivoted small footrest mounting piece 17, the middle part of small footrest mounting piece is pivoted footrest link two 18, the front end of footrest link two is pivoted with small footrest mounting piece, the rear end of footrest link two is pivoted with extension plate, extension plate, footrest link one, footrest link two and small footrest mounting piece form quadrilateral structure, the front end of extension plate is integrally formed with baffle 1521, for shielding the gap formed after quadrilateral structure is completely unfolded, the middle part of extension plate is installed with first limit pin 1522, footrest link one is set with the first limit surface 161 of first limit pin cooperation, footrest link two is set with the second limit surface 181 of first limit pin cooperation, when first limit pin and first limit surface are in contact, quadrilateral structure is unfolded to extreme position, when first limit pin and second limit surface are in contact, quadrilateral structure is folded to extreme position, the rear end of footrest link one is formed with protruding portion 162 by stamping, the protruding portion is pivoted footrest link three 19 by shaft one 191, footrest link three is in straight strip shape, simple structure, low manufacturing cost, the end of shaft one is left with gap between vertical plate of big footrest mounting plate, the rear end of footrest link three is pivoted leg link four by shaft two 192, the outer side of shaft two is sleeved with bushing 193 between footrest link three and leg link four, big footrest mounting plate is set with notch 1511, to avoid movement interference between bushing and big footrest mounting plate, when quadrilateral structure is completely unfolded, big footrest mounting plate, footrest link three and leg link four are projected on the axis of shaft two, no gap is formed between the three.

[0027] The specific working process and principle of the extended anti-pinch hand and leg mechanism of the utility model are as follows: when it is needed to be unfolded, leg link one is driven to turn outward, leg link one drives leg link two to extend obliquely upward, leg link two drives leg link three to turn outward, leg link three drives leg link four to extend obliquely upward, leg link three and leg link four drive the large footrest mounting plate to extend obliquely upward at the same time, leg link two pulls the rear end of the large footrest mounting plate, the large footrest mounting plate turns upward around the pivot shaft of leg link four, the quadrilateral structure formed by the extension plate, footrest link one, footrest link two and the small footrest mounting piece turns at the same time, leg link four restrains footrest link three, footrest link three restrains footrest link one, and the quadrilateral structure is forced to unfold until the second limiting pin abuts against the third limiting surface, the leg mechanism is unfolded to the limit position, the first limiting pin abuts against the first limiting surface, the quadrilateral structure is unfolded to the limit position, the small footrest mounting piece is extended to the front side of the large footrest plate to meet the use requirement of users with different heights and leg lengths, at this time, the front end of the extension plate just covers the gap formed after the quadrilateral structure is completely unfolded, and the large footrest mounting plate, footrest link three and leg link four do not have a gap formed between them in the projection along the axis two axis, so that the safety hazard caused by easy pinching of hands is eliminated.

[0028] As shown in Figures 3-7 A stretching device, including a base 2, a seat mechanism 3 is installed on both sides of the base, the seat mechanism includes a front mounting piece 31 and a rear mounting piece 32, one end of the front mounting piece is pivoted to the front of the base, the other end is pivoted to a front rotating piece one 33, the other end of the front rotating piece one is pivoted to an assembled side plate 34, the middle part of the front mounting piece is pivoted to a front rotating piece two 35, the other end of the front rotating piece two is pivoted to an intermediate rotating piece 36, the middle part of the intermediate rotating piece is pivoted to the assembled side plate, the other end of the intermediate rotating piece is pivoted to a front support rod 37, one end of the rear mounting piece is pivoted to the rear of the base, the other end is pivoted to a rear rotating piece 38, the rear rotating piece is pivoted to the assembled side plate, the rear rotating piece is pivoted to a side connecting rod piece 39, the other end of the side connecting rod piece is pivoted to the middle part of the front rotating piece one, a backrest mechanism 4 is installed on the rear side of the assembled side plate, the backrest mechanism includes a backrest mounting plate 41 pivoted to the tail part of the assembled side plate, the backrest mounting plate is pivoted to a rear support rod 42, the bottom end of the rear support rod is pivoted to the rear rotating piece, an extended anti-pinch hand and leg mechanism is installed on the front side of the assembled side plate, specifically, the rear ends of leg links one and three are pivoted to the front side of the assembled side plate, the rear part of the leg link one is pivoted to the front end of the front support rod.

[0029] The stretching device adopting the extended anti-pinch hand and leg mechanism realizes the conversion of the sitting posture, the TV posture and the lying posture through the driving mechanism, and the specific process can refer to the prior art with the publication number CN218738037U.

Claims

1. An extended anti-pinch leg mechanism, comprising a leg link one, a leg link two pivotally connected to the front end of the leg link one, a leg link three pivotally connected to the rear end of the leg link two, a leg link four pivotally connected to the front end of the leg link three, a large footrest mounting component pivotally connected to the front ends of the leg links three and four, a footrest link one pivotally connected to the middle of the large footrest mounting component, a small footrest mounting component pivotally connected to the front end of the footrest link one, a footrest link two pivotally connected to the middle of the small footrest mounting component, and a footrest link two pivotally connected to the rear end of the footrest link two with the large footrest mounting component. The large footrest mounting component, the footrest link one, the footrest link two, and the small footrest mounting component constitute a quadrilateral structure, characterized in that: The front end of the large footrest mounting piece is provided with a baffle for shielding the gap formed after the quadrilateral structure is fully unfolded. The rear end of the footrest link one is provided with a protruding part, the protruding part is pivotally connected with the footrest link three through a shaft one, the end of the shaft one is spaced apart from the large footrest mounting piece, the rear end of the footrest link three is pivotally connected with the leg link four through a shaft two, the outer side of the shaft two is sleeved with a bushing between the footrest link three and the leg link four, when the quadrilateral structure is fully unfolded, the large footrest mounting piece, the footrest link three and the leg link four have no gap formed therebetween in the projection along the axis of the shaft two.

2. The extended anti-pinch leg mechanism according to claim 1, characterized by: The large footrest mounting piece comprises a large footrest mounting plate pivotally connected with the leg links three and four, the front end of the large footrest mounting plate is fixedly connected with an extension plate, the footrest links one and two are pivotally connected with the extension plate, and the baffle is arranged at the front end of the extension plate.

3. The extended anti-pinch leg mechanism of claim 2, wherein: The baffle and the extension plate are integrally formed.

4. The extended anti-pinch leg mechanism of claim 3, wherein: The middle part of the extension plate is provided with a first limiting pin, the footrest link one is provided with a first limiting surface matched with the first limiting pin, and the footrest link two is provided with a second limiting surface matched with the first limiting pin.

5. The extended anti-pinch leg mechanism of claim 1, wherein: The footrest link three is in a straight strip shape.

6. The extended anti-pinch leg mechanism of claim 1, wherein: The front side of the leg link three is provided with a second limiting pin, and the leg link two is provided with a third limiting surface and a fourth limiting surface matched with the second limiting pin.

7. A stretching device comprising a base bar, a seat mechanism is arranged on the base bar, the seat mechanism comprises a front mounting and a rear mounting, one end of the front mounting is pivotally connected to the front of the base bar, the other end is pivotally connected with a front rotating part one, the other end of the front rotating part one is pivotally connected with an assembled side plate, the middle part of the front mounting is pivotally connected with a front rotating part two, the other end of the front rotating part two is pivotally connected with an intermediate rotating part, the middle part of the intermediate rotating part is pivotally connected with the assembled side plate, the other end of the intermediate rotating part is pivotally connected with a front support bar, one end of the rear mounting is pivotally connected to the rear of the base bar, the other end is pivotally connected with a rear rotating part, the rear rotating part is pivotally connected with the assembled side plate, the rear rotating part is pivotally connected with a side connecting link, the other end of the side connecting link is pivotally connected to the middle part of the front rotating part one, the rear side of the assembled side plate is provided with a backrest mechanism, characterized in that: The front side of the assembly side plate is provided with the extension type hand and leg anti-pinch mechanism as claimed in any one of claims 1 to 6.

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