CN218258317U - Locking device and folding bicycle - Google Patents

Abstract

The utility model relates to a locking device and folding car, locking device includes: the sliding sleeve is movably sleeved on the bearing pipe; the traction piece is connected with the clamping assembly so that the clamping assembly moves from a first position to a second position, the sliding sleeve can be fixed relative to the bearing pipe when the traction piece is at the first position, the sliding sleeve moves relative to the bearing pipe when the traction piece is at the second position, and a guide cavity is formed in the clamping assembly; the locating part and the piece that resets, the locating part is located on the carrier tube and is extended to the direction intracavity, and the piece one end that resets is connected with the diapire in direction chamber, and the piece other end that resets is connected with the locating part to make the card join in marriage the subassembly and remove to the first position by the second position. The locking and unlocking modes of the locking device are simpler and smoother. The folding bicycle comprises the locking device, and the locking and unlocking modes are simpler and smoother.

Description

Locking device and folding bicycle

Technical Field

The utility model relates to a baby's folding car technical field especially relates to locking device and folding car.

Background

A stroller is a tool vehicle designed to facilitate outdoor activities of a baby. With the development of the stroller technology and according to the needs of coming in and going out of various outdoor scenes and storage, the foldable stroller gradually appears.

Foldable strollers of the conventional art are generally interconnected by a plurality of pivot structures, and locking and unlocking of the stroller is achieved by changing the positional relationship of the plurality of pivot structures with respect to each other.

However, in the current foldable stroller, the structure of the stroller is too complex to achieve the foldable function, the locking and unlocking manners are not smooth, the structure is fine, and jamming is easily caused when the foldable stroller collides.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a locking device and a foldable stroller, which can simplify the structure of the stroller and make the locking and unlocking processes of the stroller and the locking and unlocking processes smoother.

A locking device is arranged on a support frame of a folding bicycle and used for locking or unlocking the support frame, and the locking device comprises:

the sliding sleeve is movably sleeved on the bearing pipe;

the traction piece is connected with the clamping assembly so that the clamping assembly moves from a first position to a second position, the sliding sleeve can be fixed relative to the bearing pipe when the traction piece is positioned at the first position, the sliding sleeve moves relative to the bearing pipe when the traction piece is positioned at the second position, and a guide cavity is formed in the clamping assembly;

the positioning piece and the piece that resets, the positioning piece is located on the carrier tube and extend to in the direction chamber, reset one end with the diapire in direction chamber is connected, reset the piece other end with the positioning piece is connected, so that the card is joined in marriage the subassembly by the second position removes to the first position.

In one embodiment, the bearing tube is radially provided with a positioning hole communicated with the guide cavity, and the positioning element is arranged in the positioning hole in a penetrating manner and abutted against the hole wall of the positioning hole.

In one embodiment, the snap-fit assembly includes a sliding member and a locking member both disposed in the carrier tube, the sliding member slides relative to the carrier tube and has the first position and the second position, and when the sliding member slides between the first position and the second position, the sliding member can make the locking member radially penetrate out of the carrier tube and the sliding sleeve to simultaneously abut against the carrier tube and the sliding sleeve, or can make the locking member radially retract into the carrier tube to separate from the sliding sleeve.

In one embodiment, a first through hole is radially formed in the bearing pipe, a second through hole is radially formed in the sliding sleeve, the first through hole and the second through hole are sequentially formed in the bearing pipe through the locking piece, the locking piece is in sliding fit with the first through hole and the second through hole in the radial direction, and the locking piece is axially abutted against the wall of the first through hole and the wall of the second through hole.

In one embodiment, the sliding member is provided with an inclined hole extending along a reference direction, the locking member includes a matching column penetrating through the inclined hole, the matching column is in sliding fit with a hole wall of the inclined hole, the reference direction is arranged in an inclined manner relative to the axial direction of the bearing pipe, and the hole wall of the inclined hole can radially push against the matching column when the sliding member slides along the axial direction, so that the locking member moves in the radial direction.

In one embodiment, the inclined hole comprises a first side wall and a second side wall which both extend along the reference direction, and the first side wall, the matching column and the second side wall are distributed in sequence along the axial direction of the bearing pipe.

In one embodiment, the locking assembly further includes a limiting sleeve disposed in the carrier tube and fixed relative to the carrier tube, the limiting sleeve is disposed on the sliding member, a limiting hole is circumferentially disposed on the limiting sleeve, and the engaging post penetrates through the limiting hole and slidably engages with a hole wall of the limiting hole to enable the locking member to move in the radial direction.

In one embodiment, the position-limiting sleeve is radially provided with a fixing hole, and the positioning piece is arranged in the fixing hole in a penetrating manner and is abutted against the hole wall of the fixing hole.

A folding cart, the folding cart comprising:

a support frame;

the locking device according to any one of the above embodiments, wherein the locking device is disposed on the support frame for locking or unlocking the support frame;

the control device is arranged on the support frame and connected with the traction piece so as to control the clamping assembly to slide through the traction piece.

In one embodiment, the support frame comprises a front leg structure, a rear leg structure and a cart handle, wherein the ends of the front leg structure, the rear leg structure and the cart handle are converged at the same position and are mutually rotatably connected, the support frame further comprises a first support rod and a second support rod, the ends of the first support rod and the second support rod are rotatably connected with the sliding sleeve, the bearing pipe is connected with the rear leg structure, one end, far away from the sliding sleeve, of the first support rod is rotatably connected with the cart handle, and one end, far away from the sliding sleeve, of the second support rod is rotatably connected with the front leg structure.

In the locking device, when the clamping assembly is at the first position, the sliding sleeve can be fixed relative to the bearing pipe, namely, the sliding sleeve is in a locking state; when the clamping assembly is at the second position, the sliding sleeve can slide relative to the bearing pipe, namely, the sliding sleeve is in an unlocking state. The clamping assembly can move between a first position and a second position through the matching of the traction piece and the reset piece, so that the locking and the unlocking are realized. The clamping assembly is arranged in the bearing pipe and slides between a first position and a second position relative to the bearing pipe, and the bearing pipe can limit the sliding of the clamping assembly structurally, so that on one hand, the sliding of the clamping assembly can be ensured to be smoother, and the locking and unlocking processes can be smoother; on the other hand, the situation that the clamping assembly cannot be accurately positioned at the first position or the second position due to collision and the like is avoided.

Drawings

FIG. 1 is an isometric view of a folding cart according to one embodiment;

FIG. 2 is a side view of the folding cart shown in FIG. 1;

FIG. 3 is a side view of the folding cart of FIG. 1 during folding;

FIG. 4 is a side view of the folding cart of FIG. 1 shown in a folded configuration;

FIG. 5 is a cross-sectional view of the folding cart shown in FIG. 2 in one direction of the rear leg structure;

FIG. 6 is a cross-sectional view of the folding cart of FIG. 2 in another orientation of the rear leg structure;

FIG. 7 is an isometric view of the snap-fit assembly and the return member of the foldable wagon of FIG. 5;

FIG. 8 is a schematic axial view of the snap fit assembly and the stop collar of the foldable wagon of FIG. 5.

Reference numerals: 10. folding the vehicle; 100. a locking device; 110. a carrier tube; 111. a sliding cavity; 112. a first via hole; 113. positioning holes; 120. a sliding sleeve; 121. a second via hole; 130. a traction member; 140. a snap-fit component; 1410. a slider; 1411. a guide cavity; 1412. a mating cavity; 1413. an inclined hole; 1413a, a first sidewall; 1413b, a second sidewall; 1414. a straight hole; 1420. a locking member; 1421. a mating post; 150. a reset member; 160. a limiting sleeve; 161. a limiting hole; 162. a fixing hole; 200. a support frame; 210. a front leg structure; 220. a rear leg structure; 230. a cart handle; 240. a rotating part; 250. a first support bar; 260. a second support bar; 270. a third support bar; 300. a roller; 400. a load bearing assembly; 500. and a control device.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 to 4, an embodiment of the present invention provides a foldable cart 10, which includes a supporting frame 200, a locking device 100, rollers 300, and a carrying device. The carrying device is disposed on the supporting frame 200, and the carrying device is used for carrying the corresponding object to be carried by the foldable cart 10. The supporting frame 200 is connected to the roller 300, and the supporting frame 200 is in contact with the ground through the roller 300 to facilitate the movement of the foldable wagon 10.

The locking assembly is disposed on the supporting stand 200 for locking or unlocking the supporting stand 200.

Referring to fig. 2 and 5, in one embodiment, the locking device 100 includes a carrier tube 110, a sliding sleeve 120, a pulling member 130, a snap-fit assembly 140, a positioning member and a restoring member 150. The sliding sleeve 120 is movably sleeved on the carrier tube 110.

The snap-fit assembly 140 is disposed inside the carrier tube 110 and slidably engaged with the carrier tube 110. The pulling member 130 is coupled to the snap assembly 140 to move the snap assembly 140 from the first position to the second position. The sliding sleeve 120 is capable of being fixed relative to the carrier tube 110 in the first position, i.e., the foldable wagon 10 is in the locked state. When the sliding sleeve 120 is in the second position, the sliding sleeve is movable relative to the carrying tube 110, that is, the foldable wagon 10 is in the unlocked state, and the supporting frame 200 of the foldable wagon 10 can be folded to reduce the overall size, so that the foldable wagon is convenient to carry and store.

The snap-fit assembly 140 has a guiding cavity 1411 formed therein, and a positioning member (not shown) is disposed on the carrier tube 110 and extends into the guiding cavity 1411. One end of the reset member 150 is connected to the bottom wall of the guide cavity 1411, and the other end of the reset member 150 is connected to the positioning member, so that the snap-fit assembly 140 moves from the second position to the first position.

In the locking device 100, the pulling member 130 and the restoring member 150 cooperate to move the latching assembly 140 between the first position and the second position, so as to lock and unlock. It can be understood that the snap fit assembly 140 is disposed in the carrier tube 110 and slides between the first position and the second position relative to the carrier tube 110, and the carrier tube 110 can structurally limit the sliding of the snap fit assembly 140, so that on one hand, the sliding of the snap fit assembly 140 can be ensured to be smoother; on the other hand, the situation that the snap-fit assembly 140 cannot be accurately located at the first position or the second position due to collision or the like is avoided.

Moreover, compared to the way of matching the pivot structures, the sliding sleeve 120 of the locking device 100 is sleeved on the carrier tube 110, and the sliding element 1410 is disposed in the carrier tube 110, i.e. the sliding sleeve 120, the carrier tube 110, and the sliding element 1410 are sleeved from outside to inside, so the matching way and structure are simpler, and the connection failure is not easy to occur.

Further, the positioning member is disposed on the carrier tube 110, and the positioning member can extend from the carrier tube 110 into the guide cavity 1411, that is, the peripheral wall of the guide cavity 1411 is disposed around the positioning member. Thus, the positioning element can limit the sliding element 1410 in a certain range, so that the sliding element 1410 can only move in a certain range relative to the carrier tube 110. The above-mentioned certain range is determined by the size of the guide chamber 1411, that is, the sliding element 1410 can move relative to the carrier tube 110, so that the positioning element and each chamber wall of the guide chamber 1411 can be respectively abutted and limited.

With reference to fig. 5 and fig. 6, further, a sliding cavity 111 is axially formed in the carrying tube 110, and the locking assembly 140 and the pulling element 130 are movably disposed in the sliding cavity 111. Referring to fig. 5 and 6, the above axial direction is shown by an arrow K in fig. 5 and 6.

Referring to fig. 2, in one embodiment, the foldable wagon 10 further includes a control device 500. The control device 500 is disposed on the supporting frame 200. The control device 500 is connected with the pulling member 130 to control the sliding of the snap assembly 140 through the pulling member 130. The control device 500 may include a button to which the drawing member 130 is connected at one end and the snap assembly 140 at the other end. When the button is pressed, the snap-fit assembly 140 can be pulled to slide relative to the carrier to unlock the foldable wagon 10.

Referring again to fig. 2, in one embodiment, the support frame 200 includes a front leg structure 210, a rear leg structure 220 and a cart handle 230, which are rotatably connected to each other and end portions of which are converged together. The support tube 110 is connected to the rear leg structure 220, and the support frame 200 further includes a first support rod 250 and a second support rod 260, both of which are rotatably connected to the sliding sleeve 120 at their ends. The end of the first support member remote from the sliding sleeve 120 is rotatably connected to the cart handle 230, and the end of the second support member remote from the sliding sleeve 120 is rotatably connected to the front leg structure 210.

Because the carrier tube 110 is coupled to the rear leg structure 220, the sliding sleeve 120 can slide relative to the rear leg structure 220 when the sliding sleeve 120 is unlocked. Thus, in combination with the connection between the first support bar 250 and the second support bar 260, the front leg structure 210, the rear leg structure 220 and the stroller handle 230 can rotate around the common rotation connection to achieve folding. When the sliding sleeve 120 is locked, the positions of the front leg structure 210, the rear leg structure 220 and the stroller handle 230 can be relatively fixed by the first support rod 250 and the second support rod 260, so that the overall structure of the foldable stroller 10 is stable.

Specifically, the supporting frame 200 may include a rotating portion 240, and the ends of the front leg structure 210, the rear leg structure 220 and the cart handle 230 are converged at the rotating portion 240 and rotatably connected to each other. For example, when the sliding sleeve 120 slides downward along the rear leg structure 220 after being unlocked, the sliding sleeve 120 can drive the cart handle 230 and the front leg structure 210 to rotate and fold around the rotating portion 240 toward the direction close to the rear leg structure 220 through the first support rod 250 and the second support rod 260, thereby achieving folding. The direction of the sliding sleeve 120 sliding downwards is shown by arrow H in fig. 2, and the directions of the trolley handle 230 and the front leg structure 210 rotating towards the rear leg structure 220 are shown by arrow M and arrow N in fig. 2 to 4, respectively. It will be appreciated that the snap-fit assembly 140 is shown in FIG. 2 in a first position, in which the foldable wagon 10 is in a locked condition; fig. 3 and 4 show the snap-fit assembly 140 from the foldable wagon 10 in the second position, in which the foldable wagon 10 is unlocked, wherein fig. 3 is a state during folding of the foldable wagon 10, and fig. 4 is a state in which the foldable wagon 10 is completely folded.

With respect to the carrier tube 110 and the rear leg structure 220, it is understood that one of the sections of the rear leg structure 220 may be replaced with the carrier tube 110 to facilitate the sliding sleeve 120 to be able to slide relative to the rear leg structure 220. Alternatively, the carrier tube 110 can be directly disposed as one of the rear leg structures 220, that is, the sliding sleeve 120 can be directly movably sleeved on the rear leg structure 220, and the snap-fit assembly 140 can be movably disposed in the rear leg structure 220. Therefore, the design can be selected according to the actual requirement, and the detailed description is omitted.

It should be understood that the locking device 100 can also be disposed on the front leg structure 210, and the corresponding movement is the same as the locking device 100 disposed on the rear leg structure 220, so that the description is omitted.

Referring to fig. 1, in one embodiment, the supporting frame 200 further includes a third supporting rod 270, one end of the third supporting rod 270 is rotatably connected to the second supporting rod 260, and the other end of the third supporting rod 270 is rotatably connected to the supporting device, when the first supporting rod 250 rotates relative to the rotating portion 240, the third supporting rod 270 also rotates, so that the supporting device is folded accordingly.

Referring to fig. 2, in one embodiment, a control device 500 may be provided on the cart handle 230 for easy control. The stroller handle 230 may be hollow, with the pull member 130 partially positioned within the stroller handle 230 and extending into the rear leg structure 220 to connect with the snap assembly 140. The pulling member 130 may be a pulling rope, which may be a steel rope or a nylon rope.

Referring to fig. 1, in one embodiment, the front leg structure 210, the rear leg structure 220 and the cart handle 230 each include a left portion and a right portion, and the ends of the three portions at the left and right sides are converged at the rotating portion 240 and rotatably connected to each other. At this time, the number of the first supporting rod 250, the second supporting rod 260, the third supporting rod 270 and the locking device 100 is two, and the two first supporting rods 250, the two second supporting rods 260 and the two locking devices 100 are correspondingly distributed at the left and the right. The specific connection relationship and the position relationship are as described in the embodiments, and are not described in detail.

Referring to fig. 5 and 6, in one embodiment, specifically, the guide cavity 1411 extends in an axial direction, and the restoring member 150 is an elastic member. When the sliding element 1410 slides relative to the carrier tube 110, since the positioning element is disposed on the carrier tube 110, the distance between the positioning element and the bottom wall of the guiding cavity 1411 changes, and the restoring element 150 is compressed or stretched accordingly. Since the reset member 150 is an elastic member, when the reset member is compressed or stretched, the elastic potential energy can be stored, and when the force for driving the snap assembly 140 to move disappears, the reset member 150 can release the elastic potential energy, so that the snap assembly 140 is restored to the first position. The restoring member 150 may be embodied as a restoring spring.

The reset element 150 may have one end abutting against the bottom wall of the guide cavity 1411 and the other end abutting against the positioning element.

Referring to fig. 5 and 6, in an embodiment, the supporting tube 110 is radially provided with a positioning hole 113 communicating with the guiding cavity 1411, and the positioning element is disposed through the positioning hole 113 and abuts against a wall of the positioning hole 113. That is, the positioning member may be inserted into the guide cavity 1411 in the carrier tube 110 through the positioning hole 113 from the outside of the carrier tube 110. Because the positioning element abuts against the wall of the positioning hole 113, the positioning element can be fixed relative to the carrier tube 110, so that the positioning element penetrating through the positioning hole 113 can limit the position of the sliding element 1410 relative to the carrier tube 110 within a certain range. It will be appreciated that the positioning member can extend into the guiding chamber 1411 by opening the bearing tube 110, which can facilitate design, installation and manufacture as opposed to directly positioning the positioning member on the wall of the sliding chamber 111 of the bearing tube 110.

With continued reference to fig. 5 and 6, in one embodiment, the snap-fit assembly 140 includes a sliding element 1410 and a locking element 1420 both disposed in the carrier tube 110. The sliding member 1410 slides relative to the carrier tube 110 and has a first position and a second position, and the sliding member 1410 can make the locking member 1420 radially pass out of the carrier tube 110 and the sliding sleeve 120 to simultaneously abut with the carrier tube 110 and the sliding sleeve 120 when sliding between the first position and the second position, or can make the locking member 1420 retract into the carrier tube 110 to separate from the sliding sleeve 120.

Specifically, when the slider 1410 is in the first position, the locking member 1420 can radially extend out of the carrier tube 110 and the sliding sleeve 120 to simultaneously abut the carrier tube 110 and the sliding sleeve 120, thereby securing the sliding sleeve 120 relative to the carrier tube 110.

During the sliding of the sliding member 1410 from the first position to the second position, the sliding member 1410 can radially retract the locking member 1420 into the carrier tube 110, thereby disengaging the sliding sleeve 120. At this time, due to the abutting action of the sliding sleeve 120 on the pickup locking member 1420, the sliding sleeve 120 can slide relative to the carrying tube 110, so as to unlock the supporting frame 200.

That is, in the locking device 100, the locking member 1420 can be moved in the radial direction by the sliding element 1410 to pass through the carrier tube 110 to abut against the sliding sleeve 120 or retract into the carrier tube 110 to be separated from the sliding sleeve 120, so that the locking and unlocking manner is simple and reliable.

It will be appreciated that the guide chamber 1411 opens onto the slide 1410 in an axial direction.

Referring to fig. 5, in one embodiment, the carrier tube 110 has a first through hole 112 along a radial direction, and the sliding sleeve 120 has a second through hole 121 along the radial direction. The locking member 1420 penetrates through the first through hole 112 and the second through hole 121 in the bearing pipe 110 in sequence, the locking member 1420 is in sliding fit with the first through hole 112 and the second through hole 121 in the radial direction, and the locking member 1420 is in axial abutment with the hole wall of the first through hole 112 and the hole wall of the second through hole 121.

Referring to fig. 6 and 7, in one embodiment, the sliding member 1410 is provided with an inclined hole 1413 extending along a reference direction, and the reference direction is inclined relative to the axial direction of the carrier tube 110. The locking member 1420 includes a mating post 1421 disposed through the angled hole 1413 such that the mating post 1421 slidably engages the wall of the angled hole 1413. The wall of the inclined hole 1413 can radially push against the engaging post 1421 when the slider 1410 slides axially to move the locking member 1420 in a radial direction. Since the extending direction of the inclined hole 1413 is inclined from the axial direction, when the slider 1410 slides in the axial direction, the inclined hole 1413 as a whole also slides in the axial direction, so as to be pushed against the fitting post 1421 in a direction perpendicular to the reference direction. Since the locking member 1420 abuts against the hole wall of the second through hole 121 opened in the radial direction, the locking member 1420 does not move in the radial direction with the slider 1410. Thus, by the engagement of the angled hole 1413 with the second through hole 121, the locking member 1420 can be moved radially to extend into the first through hole 112 or retract from the first through hole 112 into the carrier tube 110.

With continued reference to fig. 6 and 7, in one embodiment, the inclined hole 1413 includes a first sidewall 1413a and a second sidewall 1413b both extending along the reference direction, and the first sidewall 1413a, the matching column 1421 and the second sidewall 1413b are distributed along the axial direction of the carrier tube 110. Since the reference direction is inclined from the axial direction, one of the first side wall 1413a and the second side wall 1413b is located below the corresponding mating column 1421 in the axial direction, and the other is located above the corresponding mating column 1421. Referring to fig. 6 and 7, for convenience of description, the reference direction is inclined to the left with respect to the axial direction, and the first sidewall 1413a is located above the corresponding pillar 1421, and the second sidewall 1413b is located below the corresponding pillar 1421. The reference direction is shown by arrow P in fig. 7.

Referring to fig. 6 and 7, when the sliding element 1410 slides upward relative to the carrier tube 110, the lower second sidewall 1413b can push the engaging post 1421 to move upward and rightward, and the locking element 1420 can move leftward, i.e., retract in a radial direction, in conjunction with the limiting effect of the second through hole 121.

When the sliding member 1410 slides downward relative to the carrying tube 110, the first sidewall 1413a located above can push against the engaging column 1421 to move downward and leftward, and in conjunction with the limiting effect of the second through hole 121, the locking member 1420 can move rightward, i.e., extend radially.

The above-described upper, lower, left and right are the orientations shown in fig. 6 and 7.

In one embodiment, the end of the locking member 1420 facing outward is provided with a wedge surface. The sliding sleeve 120 can push the locking member 1420 to retract radially by cooperating with the wedge surface, so that the sliding sleeve 120 can slide until the first through hole 112 is opposite to the second through hole 121, and the locking member 1420 can extend into the first through hole 112.

Referring to fig. 7, in one embodiment, the sliding member 1410 is formed with a matching cavity 1412, the inclined hole 1413 is formed on a wall of the matching cavity 1412, and the locking member 1420 is movably disposed in the matching cavity 1412. The wall of the matching cavity 1412 can also be provided with a straight hole 1414 extending along the axial direction, the straight hole 1414 is communicated with the inclined hole 1413, and the matching column 1421 can enter the straight hole 1414 from the inclined hole 1413. The range of up and down movement of the slider 1410 can be increased by providing the straight holes 1414 to avoid axial binding of the slider 1410 by the locking member 1420.

Referring to fig. 6 in combination with fig. 8, in an embodiment, the locking assembly 140 further includes a position-limiting sleeve 160 disposed inside the carrying tube 110 and fixed relative to the carrying tube 110, wherein the position-limiting sleeve 160 is disposed on the sliding member 1410, that is, the position-limiting sleeve 160 is disposed between the sliding member 1410 and the carrying tube 110. The limiting sleeve 160 is circumferentially provided with a limiting hole 161, and the engaging post 1421 penetrates through the limiting hole 161 and is slidably engaged with the hole wall of the limiting hole 161 so as to enable the locking member 1420 to move along the radial direction. In other words, the stop collar 160 can limit the movement of the locking member 1420 relative to the carrier tube 110 in only a radial direction, and the locking member 1420 and the carrier tube 110 are not displaced relative to each other in the axial direction. So configured, the locking member 1420 is prevented from moving axially relative to the carrier tube 110 along with the sliding member 1410, thereby preventing the locking member 1420 from moving away from the second through hole 121 and preventing the locking member 1420 from moving through the second through hole 121 into the first through hole 112 to fix the sliding sleeve 120 relative to the carrier tube 110.

Note that, when the locking member 1420 is inserted into the second through hole 121 and abuts against the hole wall of the second through hole 121, the locking member 1420 can be prevented from moving in the axial direction even through the second through hole 121. However, this arrangement requires tighter control of the travel of the locking member 1420, and prevents the locking member 1420 from retracting completely within the carrier tube 110 and separating from the wall of the second through hole 121. By providing the stopper sleeve 160, the movement of the locking member 1420 can be restricted well, so that it is not necessary to strictly control the stroke of the locking member 1420. Even if the locking member 1420 is retracted within the carrier tube 110, the locking member 1420 will not move axially and will always be positioned against the second via 121. In this way, the difficulty in manufacturing the lock device 100 can be reduced, and the lock member 1420 can be prevented from moving in the axial direction due to collision or vibration.

In one embodiment, the retaining sleeve 160 has a radially extending retaining hole 162. The positioning member is inserted into the fixing hole 162 and abuts against the fixing hole 162 of the fixing hole 162. That is, the stop collar 160 is fixed relative to the carrier tube 110 by the locating member. It is understood that the positioning member is inserted into the guiding cavity 1411 from the outside of the supporting tube 110 through the positioning hole 113 and the fixing hole 162. The positioning hole 113 and the fixing hole 162 may be disposed opposite to each other.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A locking device is arranged on a support frame of a folding bicycle and used for locking or unlocking the support frame, and is characterized by comprising:

the sliding sleeve is movably sleeved on the bearing pipe;

the traction piece is connected with the clamping assembly so that the clamping assembly moves from a first position to a second position, the sliding sleeve can be fixed relative to the bearing pipe when the traction piece is positioned at the first position, the sliding sleeve moves relative to the bearing pipe when the traction piece is positioned at the second position, and a guide cavity is formed in the clamping assembly;

the positioning part and the reset part, the positioning part is arranged on the bearing pipe and extends into the guide cavity, one end of the reset part is connected with the bottom wall of the guide cavity, and the other end of the reset part is connected with the positioning part, so that the clamping assembly moves from the second position to the first position.

2. The locking device of claim 1, wherein the bearing tube is radially provided with a positioning hole communicating with the guide cavity, and the positioning element is inserted into the positioning hole and abuts against the wall of the positioning hole.

3. The closure of claim 2 wherein said snap-fit assembly includes a slider and a locking member both disposed within said carrier tube, said slider sliding relative to said carrier tube and having said first position and said second position, said slider sliding between said first position and said second position enabling said locking member to pass radially outward of said carrier tube and said slide sleeve to simultaneously abut said carrier tube and said slide sleeve or enabling said locking member to retract radially inward of said carrier tube to separate from said slide sleeve.

4. The locking device according to claim 3, wherein the carrier tube has a first through hole formed therein along a radial direction, the slider has a second through hole formed therein along a radial direction, the locking member sequentially penetrates the first through hole and the second through hole from within the carrier tube, the locking member is slidably fitted with the first through hole and the second through hole along a radial direction, and the locking member is axially abutted against a wall of the first through hole and a wall of the second through hole.

5. The locking device of claim 3, wherein the sliding member has an inclined hole extending along a reference direction, the locking member includes a mating post inserted into the inclined hole, the mating post is slidably mated with a hole wall of the inclined hole, the reference direction is inclined relative to the axial direction of the carrier tube, and the hole wall of the inclined hole can radially push against the mating post when the sliding member slides axially, so that the locking member can radially move.

6. The lock according to claim 5, wherein the inclined hole comprises a first side wall and a second side wall both extending in the reference direction, the first side wall, the mating post and the second side wall being distributed in sequence in the axial direction of the carrier tube.

7. The locking device of claim 5, wherein the locking assembly further comprises a limiting sleeve disposed inside the carrier tube and fixed to the carrier tube, the limiting sleeve is disposed on the sliding member, a limiting hole is circumferentially disposed on the limiting sleeve, and the engaging post penetrates through the limiting hole and slidably engages with a hole wall of the limiting hole to move the locking member in a radial direction.

8. The locking device of claim 7, wherein the position-limiting sleeve is radially provided with a fixing hole, and the positioning element is inserted into the fixing hole and abuts against the hole wall of the fixing hole.

9. A folding cart, comprising:

a support frame;

the locking device of any one of claims 1 to 8, wherein the locking device is arranged on the support frame for locking or unlocking the support frame;

the control device is arranged on the support frame and connected with the traction piece so as to control the clamping assembly to slide through the traction piece.

10. The foldable cart of claim 9, wherein the support frame comprises a front leg structure, a rear leg structure and a cart handle, the ends of the front leg structure, the rear leg structure and the cart handle are assembled at the same position and are rotatably connected with each other, the support frame further comprises a first support rod and a second support rod, the ends of the first support rod are rotatably connected with the sliding sleeve, the bearing tube is connected with the rear leg structure, one end of the first support rod, which is far away from the sliding sleeve, is rotatably connected with the cart handle, and one end of the second support rod, which is far away from the sliding sleeve, is rotatably connected with the front leg structure.

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