A locking mechanism

Abstract

The present invention discloses a locking mechanism, comprising a foldable or unfoldable frame and a seat frame for installing a seat part, the frame being rotatably connected with a support block capable of supporting the seat frame, the seat frame being slidably connected to the support block, the seat frame being also rotatably connected with the frame and sliding on the support block when the frame is folded and folding as the support block rotates relative to the frame, a pressure locking device is provided between the support block and the seat frame and can lock both the support block and the seat frame when under pressure, thereby limiting the folding of the frame, the pressure locking device is used to be arranged under the seat part and act under pressure when there is a heavy object such as an infant or an animal on the seat part, so that when there is a baby or an animal sitting or lying on the seat part of the unfolded frame, the pressure locking device locks the seat frame and the support block with each other, thereby limiting the folding function of the frame by limiting the degree of freedom of the seat frame, thereby avoiding the situation that the folding function of the frame is unlocked due to carelessness or misoperation, resulting in the frame folding and collapse, and the use is safe and reliable.

Description

[Technical field]

[0001] The present invention relates to a locking mechanism. [Background technology]

[0002] Some child strollers or animal strollers are currently foldable for easy carrying. Usually, there is an unlocking switch on the push rod. When the unfolded stroller is folded, the unlocking switch can be pressed to fold the stroller. In our daily use, when there are babies or animals sitting in the stroller due to carelessness or misoperation, the unlocking switch may be pressed to cause the stroller to fold and collapse. Although it will not cause a major safety accident, it will also scare the babies or animals sitting in the stroller.

[0003] The present invention is made based on this situation. [Summary of the invention]

[0004] The technical problem to be solved by the present invention is to provide a locking mechanism, by using which, when a baby or an animal is sitting on the folding stroller, the folding stroller cannot be folded regardless of whether an unlocking switch is pressed or not, and the locking mechanism has the characteristics of simple structure, safety and reliability.

[0005] In order to solve the above technical problems, the present invention provides a locking mechanism, characterized in that it includes a foldable or unfoldable frame and a seat frame for installing a seat part arranged on the frame, the frame is rotatably connected with a support block that can support the seat frame, the seat frame is slidably connected to the support block, the seat frame is also rotatably connected to the frame and slides on the support block when the frame is folded and is folded as the support block rotates relative to the frame, a pressure locking device is provided between the support block and the seat frame, which can lock both the support block and the seat frame when under pressure, thereby limiting the folding of the frame, and the pressure locking device is used to be arranged under the seat and act under pressure when there is a heavy object on the seat.

[0006] A locking mechanism as described above is characterized in that: the pressure locking device includes a locking rod slidably connected to the support block, the seat frame is provided with a locking hole that is opposite to the locking rod when the frame is unfolded, the support block is provided with a pressure cap that can move downward when under pressure and push the locking rod to slide into the locking hole when pressed down, the pressure cap is used to be arranged under the seat and is under pressure when there is a heavy object on the seat, and an elastic member is provided between the support block and the locking rod, which can push the locking rod out of the locking hole and push the pressure cap upward after the downward pressure on the pressure cap is released.

[0007] A locking mechanism as described above is characterized in that: a sliding hole is provided on the support block, the seat frame includes a seat frame tube inserted into the sliding hole and able to slide in the sliding hole, the support block is provided with a mounting groove on the outside of the sliding hole, the upper part of the pressure cap protrudes above the support block, and the lower part is inserted into the mounting groove, the pressure cap is slidably connected to the support block and can slide up and down in the mounting groove, the locking rod is arranged in the mounting groove, the locking hole is arranged on the seat frame tube, and the support block is provided with a connecting hole that connects the mounting groove and the sliding hole and allows the locking rod to enter the sliding hole and thus be inserted into the locking hole.

[0008] A locking mechanism as described above is characterized in that: the mounting groove is located on the inner side of the seat frame, the locking rod and the locking hole are opposite to each other on the left and right, one end of the locking rod is provided with an inclined top block located in the mounting groove, the top of the inclined top block is provided with an inclined top surface, and the bottom of the pressing cap is provided with an inclined bottom surface matching the inclined top surface, when the pressing cap is pressed down, the inclined bottom surface presses the inclined top surface to push the inclined top block and the locking rod to move toward the side of the locking hole.

[0009] The locking mechanism as described above is characterized in that the elastic member is a spring sleeved on the outside of the locking rod and pressed between the inclined ejecting block and the supporting block.

[0010] A locking mechanism as described above is characterized in that the frame comprises:

[0011] A front foot rod, wherein a front wheel assembly is provided at the lower end of the front foot rod;

[0012] A rear foot rod, the lower end of which is provided with a rear wheel assembly, and the upper end of which is rotatably connected to the upper end of the front foot rod;

[0013] A hand push rod is provided with a first release mechanism, a folding device is provided between the hand push rod, the front foot rod and the rear foot rod to connect the three and allow the three to be folded in a linked manner, a second release mechanism is provided between the first release mechanism and the folding device for locking the folding device when the frame is unfolded, and the first release mechanism is used to control the second release mechanism to release the lock on the folding device.

[0014] The locking mechanism as described above is characterized in that: the support block is rotatably connected to the upper end of the rear foot rod, and the rear end of the seat frame is rotatably connected to the folding device.

[0015] A locking mechanism as described above, characterized in that the folding device comprises:

[0016] A rear connecting rod, the upper end of which is rotatably connected to the lower end of the push rod through a second release mechanism, the lower end of which is rotatably connected to the middle part of the rear foot rod, and the rear end of the seat frame is rotatably connected to the middle part of the rear connecting rod;

[0017] A front support rod, wherein the lower end of the front support rod is rotatably connected to the upper end of the rear foot rod, and the upper end of the front support rod is rotatably connected to the push rod and the connection point is located above the rear connecting rod;

[0018] It also includes a first connecting rod, a second connecting rod and a third connecting rod, one end of the first connecting rod, the second connecting rod and the third connecting rod are hinged to each other, the other end of the first connecting rod is rotatably connected to the middle part of the front foot rod, the other end of the second connecting rod is rotatably connected to the rotation connection between the rear connecting rod and the rear foot rod, and the other end of the third connecting rod is rotatably connected to the middle part of the front support rod.

[0019] Compared with the prior art, the present invention has the following advantages: the present invention installs the seat frame on the foldable frame through a support block, the support block is hinged with the frame, the seat frame is slidably connected to the support block, and the seat frame is also rotatably connected to the frame. When the frame is folded, the seat frame slides on the support block and is folded as the support block rotates relative to the frame. A pressure locking device is provided between the support block and the seat frame, which can lock both the support block and the seat frame when under pressure. The pressure locking device is used to be arranged under the seat part and acts under pressure when there is a baby or an animal sitting or lying on the seat part of the unfolded frame, so that when a baby or an animal is sitting or lying on the seat part of the unfolded frame, the pressure locking device locks the seat frame and the support block with each other, and limits the folding function of the frame by limiting the degree of freedom of the seat frame, thereby avoiding the situation where the folding function of the frame is unlocked due to carelessness or misoperation, which causes the frame to fold and collapse. The use is safe and reliable.

Brief Description of the Drawings

[0020] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0021] Figure 1 It is a schematic diagram of the structure of the present invention when the frame is in an unfolded state;

[0022] Figure 2 It is a schematic diagram of the structure of the present invention when the frame is in the folding process;

[0023] Figure 3 An exploded view of the pressure locking device;

[0024] Figure 4 A cross-sectional view of a pressure locking device. [Specific implementation method]

[0025] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0026] like Figure 1-4As shown, a locking mechanism of the present invention comprises a foldable or unfoldable frame 100 and a seat frame 1 for mounting a seat part, the frame 100 is rotatably connected with a support block 2 capable of supporting the seat frame 1, the seat frame 1 is slidably connected to the support block 2, the seat frame 1 is also rotatably connected to the frame 100 and slides on the support block 2 when the frame 100 is folded and folds with the support block 2 rotating relative to the frame 100, and a locking mechanism is provided between the support block 2 and the seat frame 1 to lock the support block 2 and the seat frame 1 when under pressure. The pressure locking device 3 is used to limit the folding of the frame 100. The pressure locking device 3 is used to be arranged under the seat and is pressed when there is a baby or an animal or other heavy object on the seat. When a baby or an animal is sitting or lying on the seat of the unfolded frame, the pressure locking device 3 locks the seat frame 1 and the support block 2 with each other, and limits the folding function of the frame 100 by limiting the degree of freedom of the seat frame 1, thereby avoiding the situation where the folding function of the frame 100 is unlocked due to carelessness or misoperation, causing the frame to fold and collapse. The use is safe and reliable.

[0027] The pressure locking device 3 includes a locking rod 31 slidably connected to the support block 2, a locking hole 12 is provided on the seat frame 1, which is directly opposite to the locking rod 31 when the frame 100 is unfolded, and a pressing cap 32 is provided on the support block 2, which can move downward when pressed and push the locking rod 31 to slide into the locking hole 12 when pressed down. The pressing cap 32 is used to be arranged under the seat and is pressed when there are heavy objects such as babies or animals on the seat, so as to push the locking rod 31 to insert into the locking hole 12, thereby preventing the seat frame 1 from sliding on the support block 2. An elastic member 33 is provided between the support block 2 and the locking rod 31, which can push the locking rod 31 out of the locking hole 12 and push the pressing cap 32 upward after the downward pressure on the pressing cap 32 is released. After a heavy object such as a baby or an animal leaves the seat, the seat releases the downward pressure applied to the pressure cap 32. Under the action of the spring force of the elastic member 33, the locking rod 31 is pushed out of the locking hole 12 and the pressure cap 32 is pushed upward, thereby releasing the lock between the seat frame 1 and the support block 2. The seat frame 1 can slide on the support block 2, restoring the freedom of the seat frame 1 on the frame 100, so that the seat frame 1 can be folded with the frame 100.

[0028] The support block 2 is provided with a sliding hole 21, and the seat frame 1 includes a seat frame tube 11 inserted into the sliding hole 21 and capable of sliding in the sliding hole 21. The support block 2 is provided with a mounting groove 22 on the outside of the sliding hole 21. The upper part of the pressure cap 32 protrudes above the support block 2, and the lower part is inserted into the mounting groove 22. The pressure cap 32 is slidably connected to the support block 2 and can slide up and down in the mounting groove 22. The locking rod 31 is arranged in the mounting groove 22, and the locking hole 12 is arranged on the seat frame tube 11. The support block 2 is provided with a connecting hole 23 that connects the mounting groove 22 and the sliding hole 21 and allows the locking rod 31 to enter the sliding hole 21 and thus be inserted into the locking hole 12. The structure is simple.

[0029] The mounting groove 22 is located on the inner side of the seat frame 1, and the locking rod 31 and the locking hole 12 are opposite to each other on the left and right. An inclined top block 34 located in the mounting groove 22 is provided on one end of the locking rod 31, and an inclined top surface 35 is provided on the top of the inclined top block 34. The bottom of the pressing cap 32 is provided with an inclined bottom surface 36 matching the inclined top surface 35. When the pressing cap 32 is pressed down, the inclined top surface 35 is pressed by the inclined bottom surface 36, thereby pushing the inclined top block 34 and the locking rod 31 toward the locking hole 12. The structure is simple, and it is convenient for heavy objects such as babies or animals to act on the pressing cap 32 through the seat when they fall on the seat.

[0030] The elastic member 33 is a spring sleeved on the outside of the locking rod 31 and pressed between the inclined ejection block 34 and the support block 2 . The structure is simple and the installation is convenient.

[0031] like Figure 1 and 2 As shown, the frame 100 can adopt the following structure, and the frame 100 includes: a front foot rod 4, a front wheel assembly 41 is provided at the lower end of the front foot rod 4; a rear foot rod 5, a rear wheel assembly 51 is provided at the lower end of the rear foot rod 5, and the upper end of the rear foot rod 5 is rotatably connected to the upper end of the front foot rod 4; a hand push rod 6, a first release mechanism 61 is provided on the hand push rod 6, a folding device connecting the hand push rod 6, the front foot rod 4 and the rear foot rod 5 and allowing the three to be folded in a linked manner is provided between the hand push rod 6, the front foot rod 4 and the rear foot rod 5, a second release mechanism 62 for locking the folding device when the frame 100 is unfolded is provided between the first release mechanism 61 and the folding device, and the first release mechanism 61 is used to control the second release mechanism 62 to release the lock on the folding device.

[0032] The support block 2 is rotatably connected to the upper end of the rear foot rod 5, and the rear end of the seat frame 1 is rotatably connected to the folding device.

[0033] The folding device comprises:

[0034] A rear connecting rod 7, the upper end of which is rotatably connected to the lower end of the hand push rod 6 through a second release mechanism 62. The first release mechanism 61 and the second release mechanism 62 may refer to the technical solution in the patent technology of the baby carriage frame folding mechanism of Patent No. 200620149308.3, or a locking and unlocking structure in other stroller fields. The lower end of the rear connecting rod 7 is rotatably connected to the middle part of the rear foot rod 5, and the rear end of the seat frame 1 is rotatably connected to the middle part of the rear connecting rod 7;

[0035] A front support rod 8, wherein the lower end of the front support rod 8 is rotatably connected to the upper end of the rear foot rod 5, and the upper end of the front support rod 8 is rotatably connected to the push rod 6 and the connection point is located above the rear connecting rod 7;

[0036] It also includes a first connecting rod 91, a second connecting rod 92 and a third connecting rod 93, one ends of the first connecting rod 91, the second connecting rod 92 and the third connecting rod 93 are hinged to each other, the other end of the first connecting rod 91 is rotatably connected to the middle part of the front foot rod 4, the other end of the second connecting rod 92 is rotatably connected to the rotatable connection between the rear connecting rod 7 and the rear foot rod 5, and the other end of the third connecting rod 93 is rotatably connected to the middle part of the front support rod 8.

[0037] After the seat portion is installed on the seat frame 1, when a baby or an animal, or other heavy object, is sitting or lying on the seat portion, the pressing cap 32 is pressed down by the seat portion. When pressed down, the pressing cap 32 presses the inclined top surface 35 through the inclined bottom surface 36, and pushes the inclined top block 34 and the locking rod 31 to move sideways, so that the locking rod 31 is inserted into the locking hole 12, preventing the seat frame tube 11 from sliding in the sliding hole 21. After the first release mechanism 61 and the second release mechanism 62 are unlocked, the frame cannot be folded because the seat frame 1 limits the folding movement of the folding device, thereby avoiding the frame folding when there are heavy objects such as babies or animals on the seat portion, and having good safety performance.

[0038] When a baby or an animal or other heavy object leaves the seat, the locking rod 31 pops out of the locking hole 12. After the first release mechanism 61 and the second release mechanism 62 are unlocked, the push rod 6 is pressed down to control the frame to fold. Under the linkage action of the first connecting rod 91, the second connecting rod 92, the third connecting rod 93 and the rear connecting rod 7, the front foot rod 4, the rear foot rod 5 and the front support rod 8 are automatically brought together. At the same time, the rear connecting rod 7 drives the seat frame 1 to slide on the support block 2 and rotate around the rear foot rod 5 together with the support block 2 to achieve folding. The operation is simple and convenient, and the volume is small after folding.

[0039] The frame structure connected to the seat frame can also be the structure in the patent number 201621356609.3, which is named as a patent for a folding baby carriage; it can also be the structure in the patent number CN201820248836.7, which is named as a patent for a folding mechanism for a baby carriage.

Claims

1. A locking mechanism, characterized in that: The invention comprises a foldable or unfoldable frame (100) and a seat frame (1) arranged on the frame (100) for mounting a seat, wherein a support block (2) capable of supporting the seat frame (1) is rotatably connected to the frame (100), the seat frame (1) is slidably connected to the support block (2), the seat frame (1) is also rotatably connected to the frame (100) and slides on the support block (2) when the frame (100) is folded and folds with the support block (2) rotating relative to the frame (100), the support block (2) and the seat frame A pressure locking device (3) is provided between the support block (2) and the seat frame (1) when under pressure, thereby limiting the folding of the frame (100). The pressure locking device (3) is used to be arranged under the seat portion and to be activated when a heavy object is placed on the seat portion. When a baby or an animal is sitting or lying on the seat portion of the unfolded frame (100), the pressure locking device (3) locks the seat frame (1) and the support block (2) with each other, thereby limiting the folding of the frame (100) by limiting the degree of freedom of the seat frame (1). The vehicle frame (100) comprises: A front foot rod (4), wherein a front wheel assembly (41) is provided at the lower end of the front foot rod (4); A rear foot rod (5), wherein a rear wheel assembly (51) is provided at the lower end of the rear foot rod (5), and the upper end of the rear foot rod (5) is rotatably connected to the upper end of the front foot rod (4); A push rod (6), wherein a first release mechanism (61) is provided on the push rod (6), a folding device is provided between the push rod (6), the front foot rod (4) and the rear foot rod (5) to connect the three and allow the three to be folded in a linked manner, a second release mechanism (62) is provided between the first release mechanism (61) and the folding device for locking the folding device when the frame (100) is unfolded, and the first release mechanism (61) is used to control the second release mechanism (62) to release the lock on the folding device; The support block (2) is rotatably connected to the upper end of the rear foot rod (5), and the rear end of the seat frame (1) is rotatably connected to the folding device; The pressure locking device (3) comprises a locking rod (31) slidably connected to the support block (2); the seat frame (1) is provided with a locking hole (12) which is opposite to the locking rod (31) when the frame (100) is unfolded; the support block (2) is provided with a pressing cap (32) which can move downward when under pressure and push the locking rod (31) to slide into the locking hole (12) when pressed; the pressing cap (32) is used to be arranged under the seat and to be pressed when there is a heavy object on the seat; an elastic member (33) is provided between the support block (2) and the locking rod (31) which can push the locking rod (31) out of the locking hole (12) and push the pressing cap (32) upward after the downward pressure on the pressing cap (32) is released; When the locking rod (31) is inserted into the locking hole (12), the locking rod (31) prevents the seat frame (1) from sliding on the support block (2); after the first release mechanism (61) and the second release mechanism (62) are unlocked, the seat frame (1) limits the folding movement of the folding device, so that the frame (100) cannot be folded.

2. A locking mechanism according to claim 1, characterized in that: The support block (2) is provided with a sliding hole (21), the seat frame (1) includes a seat frame tube (11) inserted into the sliding hole (21) and capable of sliding in the sliding hole (21), the support block (2) is provided with a mounting groove (22) located outside the sliding hole (21), the upper part of the pressure cap (32) protrudes above the support block (2), and the lower part is inserted into the mounting groove (22), the pressure cap (32) is slidably connected to the support block (2) and can slide up and down in the mounting groove (22), the locking rod (31) is arranged in the mounting groove (22), the locking hole (12) is arranged on the seat frame tube (11), and the support block (2) is provided with a connecting hole (23) connecting the mounting groove (22) and the sliding hole (21) and allowing the locking rod (31) to enter the sliding hole (21) and thus be inserted into the locking hole (12).

3. A locking mechanism according to claim 2, characterized in that: The mounting groove (22) is located on the inner side of the seat frame (1); the locking rod (31) and the locking hole (12) are opposite to each other on the left and right; an inclined top block (34) located in the mounting groove (22) is provided on one end of the locking rod (31); an inclined top surface (35) is provided on the top of the inclined top block (34); and an inclined bottom surface (36) matched with the inclined top surface (35) is provided on the bottom of the pressing cap (32); when the pressing cap (32) is pressed down, the inclined bottom surface (36) presses against the inclined top surface (35), thereby pushing the inclined top block (34) and the locking rod (31) to move toward one side of the locking hole (12).

4. A locking mechanism according to claim 3, characterized in that: The elastic member (33) is a spring sleeved on the outside of the locking rod (31) and pressed between the inclined ejection block (34) and the support block (2).

5. A locking mechanism according to claim 1, characterized in that: The folding device comprises: A rear connecting rod (7), the upper end of the rear connecting rod (7) is rotatably connected to the lower end of the push rod (6) through a second release mechanism (62), the lower end of the rear connecting rod (7) is rotatably connected to the middle part of the rear foot rod (5), and the rear end of the seat frame (1) is rotatably connected to the middle part of the rear connecting rod (7); A front support rod (8), wherein the lower end of the front support rod (8) is rotatably connected to the upper end of the rear foot rod (5), and the upper end of the front support rod (8) is rotatably connected to the push rod (6) and the connection point is located above the rear connecting rod (7); It also includes a first connecting rod (91), a second connecting rod (92) and a third connecting rod (93), one end of the first connecting rod (91), the second connecting rod (92) and the third connecting rod (93) are hinged to each other, the other end of the first connecting rod (91) is rotatably connected to the middle part of the front foot rod (4), the other end of the second connecting rod (92) is rotatably connected to the rotatable connection between the rear connecting rod (7) and the rear foot rod (5), and the other end of the third connecting rod (93) is rotatably connected to the middle part of the front support rod (8).

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