Armrest landing manual stretching device

Abstract

The utility model discloses an armrest landing manual stretching device. The armrest landing manual stretching device comprises a side mounting plate, a seat mechanism is arranged on the side mounting plate, a backrest mechanism is arranged on one side of the seat mechanism, a leg mechanism is arranged on the other side of the seat mechanism, the leg mechanism comprises a first leg connecting rod and a second leg connecting rod which are in pivot joint with the seat mechanism, and the other end of the first leg connecting rod is in pivot joint with a third leg connecting rod. The other end of the second leg connecting rod is in pivot joint with a fourth leg connecting rod, the middle of the fourth leg connecting rod is in pivot joint with the first leg connecting rod, the other end of the fourth leg connecting rod is in pivot joint with a fifth leg connecting rod, the middle of the fifth leg connecting rod is in pivot joint with the middle of the third leg connecting rod through a first shaft, and the other side of the fifth leg connecting rod is in pivot joint with a sixth leg connecting rod through a second shaft. The other end of the sixth leg connecting rod and the other end of the third leg connecting rod are pivoted with a foot rest at the same time, and an elastic pulling piece is arranged between the fifth leg connecting rod and the third leg connecting rod. The utility model solves the problem of low product quality in the prior art.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of home manufacturing, especially relates to a hand-operated type stretching device of armrest floor type. BACKGROUND

[0002] As Figure 1 The existing hand-operated type stretching device is shown in the figure, when the sitting posture is converted to the TV posture, the hand needs to be supported on the armrest to cooperate with the back to exert force backward, so as to force the backrest mounting plate to move backward, and the backrest mounting plate opens the leg mechanism through the seat frame mounting plate; when the TV posture is converted to the sitting posture, the leg mechanism is directly folded to exert force and is retracted. However, when the leg mechanism is retracted, the retraction may not be in place, and when it is unfolded, the support of the footrest plate is small and prone to sagging, which reduces the product quality in both cases. UTILITY MODEL CONTENT

[0003] In view of the deficiencies of the prior art, the utility model aims to provide a hand-operated type stretching device of armrest floor type which can ensure that the leg mechanism can be completely retracted and increase the support of the footrest plate, thereby improving the product quality.

[0004] To achieve the above-mentioned purpose, the hand-operated type stretching device of armrest floor type of the utility model adopts the technical scheme that:

[0005] A hand-operated type stretching device of armrest floor type comprises a side mounting plate, a seat mechanism is arranged on the side mounting plate, a backrest mechanism is arranged on one side of the seat mechanism, and a leg mechanism is arranged on the other side of the seat mechanism, the leg mechanism comprises a leg link one and a leg link two which are pivotally connected with the seat mechanism, the other end of the leg link one is pivotally connected with a leg link three, the other end of the leg link two is pivotally connected with a leg link four, the middle part of the leg link four is pivotally connected with the leg link one, the other end of the leg link four is pivotally connected with a leg link five, the middle part of the leg link five is pivotally connected with the middle part of the leg link three through a shaft one, the other side of the leg link five is pivotally connected with a leg link six through a shaft two, the other end of the leg link six and the leg link three is pivotally connected with a footrest plate, an elastic puller is arranged between the leg link five and the leg link three, when sitting, the two stress points of the elastic puller are respectively connected with the line of the center of the shaft one, the included angle formed in the projection direction along the shaft one axis is 90°<α<180°, and the included angle is towards the seat mechanism.

[0006] Preferably, the assembly side plate is pivotally connected with a pull rod on one side close to the leg mechanism, a limiting sliding groove is formed in the other end of the pull rod, and the leg link two is fixedly connected with a pin shaft which slides in the limiting sliding groove.

[0007] Preferably, the elastic puller is a tension spring. It can also be an elastic woven belt or an elastic band.

[0008] Preferably, a first hook is provided on the third leg link and a second hook is provided on the fifth leg link. One end of the tension spring is installed on the first hook and the other end is installed on the second hook.

[0009] Preferably, the leg link three is provided with a limit pin on the side of the footrest plate, and the footrest plate has a limiting surface that cooperates with the limit pin.

[0010] Compared with the prior art, this utility model has the following advantages:

[0011] An elastic puller is installed between leg link five and leg link three. When seated, the elastic puller pulls leg link three inward. The angle formed by the lines connecting the two force points of the elastic puller to the center of shaft one along the projection direction of shaft one is 90° < α < 180°, which constitutes a self-locking state, thereby ensuring that the leg mechanism is retracted in place. When the leg mechanism is opened, the length of the elastic puller shortens, increasing the support force of leg link six and preventing the footrest from sagging, thereby improving product quality. Attached Figure Description

[0012] Figure 1 This is a structural diagram of an existing manual extension device.

[0013] Figure 2 This is a structural schematic diagram of the manual extension device for the handrail that is placed on the ground according to this utility model.

[0014] Figure 3 This is a rear view of the manual extension device for the handrail of this utility model in a TV posture.

[0015] Figure 4 This is a front view of the manual extension device for the handrail of this utility model in the TV posture state.

[0016] Figure 5 This is a rear view of the handrail manual extension device of this utility model in a seated position.

[0017] Figure 6 yes Figure 5 Enlarged view of point C.

[0018] Figure 7 This is a front view of the handrail manual extension device of this utility model in a seated position.

[0019] Figure 8 This is a rear view of the handrail manual extension device of this utility model in a reclining position.

[0020] Figure 9 This is a front view of the handrail manual extension device of this utility model in a reclining position.

[0021] Wherein, 1 side mounting plate, 2 seat mechanism, 21 seat frame mounting plate, 22 rear support rod, 23 lifting rod, 24 limit rod, 3 backrest mechanism, 31 backrest mounting plate, 4 leg mechanism, 41 leg connecting rod one, 42 leg connecting rod two, 421 pin shaft, 43 leg connecting rod three, 431 limit pin, 432 first hook, 44 leg connecting rod four, 45 leg connecting rod five, 451 second hook, 46 shaft one, 47 shaft two, 48 leg connecting rod six, 49 foot rest, 491 limit surface, 5 pull rod, 51 limit sliding groove, 6 elastic pull piece. DETAILED DESCRIPTION

[0022] The utility model is further illustrated below in combination 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.

[0023] As Figures 2-9As shown, a handrail floor manual stretching device, including a side mounting plate 1, a seat mechanism 2 mounted on the side mounting plate, a backrest mechanism 3 mounted on the rear side of the seat mechanism, the seat mechanism and the backrest mechanism are prior art, the specific structure and the connection relationship between each other can be seen in the Chinese invention patent application document with the name of "a handrail floor simple iron frame" with the publication number CN119157371A, a leg mechanism 4 is mounted on the front side of the seat mechanism, the leg mechanism includes a leg link one 41 and a leg link two 42 pivoted with the seat mechanism, the front end of the leg link one is pivoted with a leg link three 43, the front end of the leg link two is pivoted with a leg link four 44, the middle part of the leg link four is pivoted with the leg link one, the front end of the leg link four is pivoted with a leg link five 45, the leg link five is an L-shaped stamping part, the middle part of the L-shaped stamping part is pivoted with the middle part of the leg link three through a shaft one 46, the corner of the L-shaped stamping part is pivoted with a leg link six 48 through a shaft two 47, the front end of the leg link six and the leg link three is pivoted with a foot rest 49 at the same time, a pull rod 5 is pivoted with the side of the leg mechanism close to the leg mechanism, a limiting sliding groove 51 is formed in the front end of the pull rod, a pin shaft 421 is fixedly connected in the limiting sliding groove and slides in the sliding groove, the pin shaft limits the limit state of the leg mechanism in the sitting position and the lying position, a limiting pin 431 is installed on the side of the leg link three close to the foot rest, a limiting surface 491 is formed in the foot rest matched with the limiting pin, when the leg mechanism is folded, the limiting surface is in contact with the limiting pin, limiting the angle of the foot rest turning down, an elastic puller 6 is installed between the leg link five and the leg link three, the elastic puller is a tension spring, in order to facilitate the installation of the tension spring, a first hook 432 is installed on the leg link three between the shaft one and the foot rest, a second hook 451 is installed on the leg link five at the end of the leg link five close to the shaft two, one end of the tension spring is installed on the first hook, the other end is installed on the second hook, in the sitting position, the two ends of the elastic puller are respectively in contact with the line connecting the center of the shaft one, the included angle α formed in the projection direction along the shaft one is 163°, and the included angle is towards the seat mechanism.

[0024] The specific working process and principle of the handrail floor manual stretching device of the utility model are as follows: when the sitting posture is converted into the TV posture, the back applies a pushing force to the backrest mounting plate 31, at this time, the handrail can be pushed and pressed by means of both hands to increase the pushing force of the back, the backrest mounting plate is driven to move backward by the force, the seat frame mounting plate 21 drives the leg mechanism to stretch out to the front side, during the relative rotation of the leg connecting rod three and the leg connecting rod five, the tension spring is first stretched, when the line connecting the force points at both ends of the tension spring passes through the shaft one axis, the length of the tension spring reaches the maximum value, then the self-locking structure is released, the length of the tension spring gradually shortens, the leg mechanism is smoothly unfolded, the leg connecting rod three tightens the leg connecting rod five through the tension spring, the supporting force of the leg connecting rod six is increased, the foot rest is ensured not to sag, at the same time, the pull rod also turns over to the upper side along with the leg connecting rod two, the pin shaft slides from the rear side of the sliding groove to the middle part of the sliding groove. When the TV posture is converted into the lying posture, the backrest mounting plate is applied with force again, the backrest mounting plate turns over backward, driving the seat frame mounting plate to move upward and backward, the seat frame mounting plate lifts the rear support rod 22 upward and drives the lifting rod 23 to rotate through the leg connecting rod two, the rear support rod drives the limiting rod 24 to rotate, at the same time, the pull rod also turns over upward along with the leg mechanism, the pin shaft slides from the middle part of the sliding groove to the front side of the sliding groove, the leg mechanism is limited to continue to rise upward, and the lying posture is completely entered. When the lying posture is converted into the TV posture, the back is away from the backrest, the load is transferred to the seat frame mounting plate, the seat frame mounting plate is driven to move to the front side, and the backrest mechanism is reset. When the TV posture is converted into the sitting posture, the calf is bent, the foot rest is forced to increase, the leg mechanism is reset, the pin shaft slides to the rear side of the sliding groove, the leg mechanism is contracted to the limit position, and the sitting posture is completely entered, at this time, the tension spring tightens the leg connecting rod three and forms the self-locking structure, so that the foot rest mounting plate can be completely tightened. The utility model increases the tension spring between the leg connecting rod three and the leg connecting rod five, which solves the problem that the leg mechanism cannot be tightened, solves the problem that the foot rest easily sags after the leg mechanism is unfolded, and improves the product quality.

Claims

1. A manually extendable armrest with floor support, comprising a side mounting plate, a seat mechanism mounted on the side mounting plate, a backrest mechanism mounted on one side of the seat mechanism, and a leg mechanism mounted on the other side. The leg mechanism includes a leg link 1 and a leg link 2 pivotally connected to the seat mechanism; a leg link 3 pivotally connected to the other end of leg link 1; a leg link 4 pivotally connected to the other end of leg link 2; a middle portion of leg link 4 pivotally connected to leg link 1; a leg link 5 pivotally connected to the other end of leg link 4; a middle portion of leg link 5 pivotally connected to the middle portion of leg link 3 via a shaft 1; a leg link 6 pivotally connected to the other side of leg link 5 via a shaft 2; and a footrest pivotally connected to the other ends of leg link 6 and leg link 3. The device is characterized in that: An elastic pull member is provided between the leg link five and the leg link three. When sitting, the angle formed by the lines connecting the force points at both ends of the elastic pull member to the center of the first axis along the projection direction of the first axis is 90°<α<180°, and the angle is directed towards the seat mechanism.

2. The handrail floor-mounted manual extension device according to claim 1, characterized in that: The assembly side plate is pivotally connected to a pull rod on the side adjacent to the leg mechanism. A limit groove is provided at the other end of the pull rod, and the leg connecting rod 2 is fixedly connected to a pin that slides within the limit groove.

3. The handrail floor-mounted manual extension device according to claim 1, characterized in that: The elastic tension member is a tension spring.

4. The handrail floor-mounted manual extension device according to claim 3, characterized in that: The leg link three is provided with a first hook, and the leg link five is provided with a second hook. One end of the tension spring is installed on the first hook, and the other end is installed on the second hook.

5. The handrail floor-mounted manual extension device according to claim 4, characterized in that: The leg link three is provided with a limit pin on one side of the foot rest, which is close to the foot rest plate, and the foot rest plate has a limiting surface that cooperates with the limit pin.

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