Telescopic rod locking mechanism

Abstract

The telescopic rod locking mechanism comprises a first connecting piece and a second connecting piece which can slide in a telescopic mode relative to each other, and a first locking mechanism for locking the first connecting piece and the second connecting piece when the first connecting piece and the second connecting piece are in a contraction state is arranged between the first connecting piece and the second connecting piece; the second connecting piece is provided with an inserting part which is inserted into the first connecting piece and can slide relative to the first connecting piece; the first locking mechanism comprises a locking matching part formed at the bottom of the inserting part, an elastic locking piece movably connected to the bottom of an inner cavity of the first connecting piece and capable of being locked into the locking matching part, and a two-lock assembly capable of moving relative to the inserting part. The first locking mechanism controls whether the elastic locking piece can be disengaged from the locking matching part or not through the double-lock assembly, and then unlocking or locking of the first connecting piece and the second connecting piece is achieved. The structure is novel, locking is more reliable, and a simple unlocking operation function is achieved.

Description

Technical Field

[0001] This application relates to a telescopic rod locking mechanism. Background Technology

[0002] Telescopic rod mechanisms are used in strollers, especially folding strollers. This structure allows for the increase or decrease of the overall length of the rod. On the one hand, it makes it easy for people to adjust the length of the rod according to actual usage requirements; on the other hand, it minimizes the volume occupied by the stroller when it is not in use.

[0003] In existing technology, the telescopic rod mechanism used in strollers typically includes a first rod and a second rod slidably disposed with respect to the first rod. The second rod has a cavity and a slot extending along its length, and the slot and the cavity are connected. The first rod includes a first rod body that provides the main strength, a limiting member disposed on the first rod body, and a connecting neck connecting the first rod body and the limiting member. The limiting member is inserted into the cavity, the connecting neck is located in the slot, and the first rod body is located outside the cavity. Other rods can be mounted on the first rod body for rotatable connection. Such a telescopic rod mechanism can only shorten or lengthen the rod, but cannot achieve locking between the two. Summary of the Invention

[0004] The purpose of this application is to provide a novel and reliable telescopic rod locking mechanism.

[0005] The technical solution of this application is: a telescopic rod locking mechanism, including a first connecting member and a second connecting member that can slide relative to each other. A first locking mechanism is provided between the first connecting member and the second connecting member to lock them when they are in a retracted state. The second connecting member has a plug-in portion inserted into the first connecting member and slidable relative to it. The first locking mechanism includes a locking part formed at the bottom of the plug-in portion, an elastic locking member movably connected to the bottom of the inner cavity of the first connecting member and lockable with the locking part, and a two-lock assembly that can move relative to the plug-in portion. The elastic locking member and the locking part are inclinedly engaged, and the two can achieve inclined sliding engagement through the sliding unfolding or sliding retracting movements of the first connecting member and the second connecting member, thereby causing the elastic locking member to disengage from or lock into the locking part. The first locking mechanism controls whether the elastic locking member can disengage from the locking part through the two-lock assembly, thereby unlocking or locking the first connecting member and the second connecting member.

[0006] As a preferred technical solution, the elastic locking device includes a locking hook rotatably connected to the bottom of the inner cavity of the first connector and a first reset member disposed between the locking hook and the first connector; the locking hook has a protruding locking tongue, and the locking part includes a locking groove corresponding to the locking tongue and a guide surface formed at its bottom for the locking tongue to slide into the locking groove.

[0007] As a preferred technical solution, the sliding mating surface of the latch is V-shaped, having an inlet slope and an outlet slope; the lock groove is V-shaped, and the guide surface at the bottom of the locking part can slide with the inlet slope of the latch.

[0008] As a preferred technical solution, the double-lock assembly includes a sliding seat slidably disposed on the insertion portion of the second connector and a second reset member disposed between the sliding seat and the second connector; the sliding seat is connected to the unlocking structure via a traction cable, and the unlocking structure can release the lock of the first locking mechanism by driving the sliding seat to slide through the traction cable.

[0009] As a further technical solution, the unlocking structure is a first unlocking component that is set on the first connector or the second connector and can directly pull the traction cable.

[0010] As a further technical solution, the unlocking structure includes a third connector rotatably mounted on the side of the second connector away from the first connector. One end of the traction cable is connected to the sliding seat, and the other end is directly or indirectly connected to the third connector. A second locking mechanism is provided between the third connector and the second connector to lock them when they are in the unfolded state. The third connector is provided with a second unlocking component for releasing the second locking mechanism.

[0011] When the second unlocking component releases the second locking mechanism and the third connector is rotated to fold and retract relative to the second connector, the sliding seat can be slid by the traction cable to release the first locking mechanism.

[0012] Compared with the prior art, this application has the following advantages:

[0013] The first and second connectors in this application are telescopic structures, and there is a first locking mechanism between them to lock them when they are in the retracted state. The first locking mechanism adopts a cooperative method in which the elastic locking device locks into the locking part, and the elastic locking device can be disengaged from the locking part by a two-lock assembly, thereby realizing the unlocking or locking of the first and second connectors. The structure is relatively novel, the locking is more reliable, and it has a simple unlocking operation function, which facilitates the purpose of easy and quick folding of the stroller. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. The drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] The structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this application. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0016] Figure 1 This is a schematic diagram of the structure when the first connector and the second connector in this application are disassembled;

[0017] Figure 2 This is a schematic diagram of the assembly structure of the first connector and the second connector in this application.

[0018] Figure 3 This is a schematic diagram of the structure of the first connector and the second connector after assembly and the first locking mechanism is in the locked state in this application.

[0019] Figure 4 for Figure 3 A partial cross-sectional structural diagram;

[0020] Figure 5 for Figure 2 Schematic diagram of the partial assembly structure in the middle;

[0021] Figure 6 This is a schematic diagram of the structure of the first connector and the second connector after assembly and when the first locking mechanism is in the unlocked state in this application.

[0022] Figure 7 This is a three-dimensional structural diagram of the present application when used in a stroller and the stroller is in the unfolded state;

[0023] Figure 8 This is a three-dimensional structural diagram of the stroller when the present application is used in the stroller and the stroller is in the folding process;

[0024] Figure 9 This is a three-dimensional structural diagram of the present application when used in a stroller and the stroller is in a folded state.

[0025] Wherein: 1. First connecting member;

[0026] 2. Second connector; 201. Insertion part;

[0027] 3. Third connector;

[0028] 4 First locking mechanism; 401 Lock fitting part; 4011 Lock groove; 4012 Guide surface; 402 Elastic locking component; 4021 Lock hook; 40211 Lock tongue; 4022 First reset component; 403 Second lock assembly; 4031 Sliding seat; 4032 Second reset component; 4033 Traction cable. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the described embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. It is understood that, without conflict, some technical means of the various embodiments described herein can be substituted for or combined with each other.

[0030] In the description of this application and the claims, the terms "first," "second," etc., are used only to distinguish the described objects and have no sequential or technical meaning. Therefore, objects specified with "first," "second," etc., may explicitly or implicitly include one or more of those objects. Furthermore, the words "one" or "a" do not indicate a quantity limitation, but rather indicate the presence of at least one, while "multiple" indicates not less than two.

[0031] In the description of this application and the claims, the terms "connection," "installation," "fixation," and "reception," unless otherwise specified, should be interpreted broadly. For example, "connection" can mean a separate connection or an integral connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean a non-detachable connection or a detachable connection. As another example, "reception" does not necessarily mean complete containment; this concept also includes the containment of a portion that protrudes externally. Those skilled in the art can understand the specific meaning of the aforementioned terms in this application based on the specific circumstances.

[0032] In the description of this application and the claims, if terms such as "above," "below," or "horizontal" indicate orientation or positional relationships based on the orientation or positional relationships shown in the drawings, they are only for the purpose of clearly and simply describing this application, and do not indicate or imply that the elements referred to must have a specific orientation or be constructed and operated in a specific orientation. These directional terms are relative concepts used for relative description and clarification, and may change accordingly depending on the orientation of the components in the drawings. For example, if the device in the drawings is flipped, an element described as "below" other elements will be positioned "above" other elements.

[0033] In the description of this application specification and claims, the term "if" is generally interchangeable with "when," "at," "in response to determination," or "in response to detection," depending on the context.

[0034] In the description of this application and the claims, if there is a "direction" of motion, including motion with a directional component, the term "in direction" is not necessarily understood as motion only in that one direction. Those skilled in the art can understand the specific meaning of the aforementioned terms in this application according to the specific circumstances.

[0035] like Figures 1 to 9 As shown, a telescopic rod locking mechanism includes a first connecting member 1 and a second connecting member 2 that can slide relative to each other. A first locking mechanism 4 is provided between the first connecting member 1 and the second connecting member 2 to lock them when they are in a retracted state. The second connecting member 2 has a plug-in portion 201 that is inserted into the first connecting member 1 and can slide relative to it. The first locking mechanism 4 includes a locking part 401 formed at the bottom of the plug-in portion 201 and an elastic locking member 402 that is movably connected to the bottom of the inner cavity of the first connecting member 1 and can be locked into the locking part 202. The system includes a double-lock assembly 403 that is movable relative to the insertion portion 201; the elastic locking member 402 engages with the locking portion 401 on an inclined surface, and the two can achieve an inclined sliding engagement through the sliding unfolding or sliding retracting movements of the first connecting member 1 and the second connecting member 2, thereby allowing the elastic locking member 402 to disengage from or lock into the locking portion 401; the first locking mechanism 4 controls whether the elastic locking member 402 can disengage from the locking portion 401 through the double-lock assembly 403, thereby unlocking or locking the first connecting member 1 and the second connecting member 2.

[0036] When the first connector 1 and the second connector 2 are in a retracted state, the elastic locking device 402 locks into the locking part 401, and the double locking assembly 403 blocks the elastic locking device 401 so that it cannot exit the locking part, thereby keeping the first connector 1 and the second connector 2 in a locked state.

[0037] When the first connecting member 1 and the second connecting member 2 need to extend, the first locking mechanism 4 disengages from the elastic locking member 402 through the movement of the two-lock assembly 403. At this time, the first connecting member 1 and the second connecting member 2 can extend and slide to disengage the elastic locking member 402 from the locking part 401, thereby unlocking.

[0038] In this embodiment, the elastic locking member 402 includes a locking hook 4021 rotatably connected to the bottom of the inner cavity of the first connecting member 1 and a first reset member 4022 disposed between the locking hook 4021 and the first connecting member 1; the locking hook 4021 has a protruding locking tongue 40211, and the locking fitting part 401 includes a locking groove 4011 corresponding to the locking tongue 40211 and a guide surface 4012 formed at its bottom for the locking tongue 40211 to slide into the locking groove 4011. Preferably, the sliding mating surface of the locking tongue 40211 is a horizontal V-shape, with an upper guide slope and a lower guide slope; the locking groove 4011 is also a horizontal V-shape, and the guide surface 402 at the bottom of the locking fitting part 401 can slide and engage with the guide slope of the locking tongue 40211.

[0039] When the first connector 1 and the second connector 2 slide and unfold, the locking tongue 40211 slides and engages with the lower inclined surface of the locking groove 4011 through the outgoing inclined surface, causing the locking hook 4021 to exit the locking groove. At this time, the locking hook 4021 rotates outward, and the first reset member 4022 is in a compressed state.

[0040] When the first connector 1 and the second connector 2 slide and retract, the latch 40211 slides into the lock groove 4011 by slidingly engaging the guide surface 4012 at the bottom of the locking part 401 with the guide surface 4012 of the guide surface 4021.

[0041] In this embodiment, the double-lock assembly 403 includes a sliding seat 4031 slidably disposed on the insertion portion 201 of the second connector 2 and a second reset member 4032 disposed between the sliding seat 4031 and the second connector 2; the sliding seat 4031 is connected to the unlocking structure via a traction cable 4033, and the unlocking structure can release the lock of the first locking mechanism by driving the sliding seat 4031 to slide through the traction cable 4033.

[0042] In this embodiment, the unlocking structure includes a third connector 3 rotatably mounted on the side of the second connector 2 away from the first connector 1. One end of the traction cable 4033 is connected to the sliding seat 4031, and the other end is directly or indirectly connected to the third connector 3. A second locking mechanism is provided between the third connector 3 and the second connector 2 to lock them when they are in the unfolded state. The third connector 3 is provided with a second unlocking component for releasing the second locking mechanism. The second locking mechanism is a conventional technology in this field and has various structures, so it is not specifically limited or described here.

[0043] The second locking mechanism and the first locking mechanism 4 adopt a linkage unlocking design. When the second unlocking component releases the second locking mechanism and rotates the third connecting piece 3 to fold and retract relative to the second connecting piece 2, the sliding seat 4031 can be slid by the traction cable 4033 to release the lock of the first locking mechanism 4.

[0044] like Figures 7 to 9 As shown, this application applies to children's strollers. The first connecting member 1 can be a lower push rod, the second connecting member 2 can be an upper push rod, and the third connecting member 3 can be a push handle. When folding the stroller, the second locking mechanism can be released, and then the third connecting member 3 (push handle) can be rotated to fold forward relative to the second connecting member 2 (upper push rod), automatically releasing the first locking mechanism 4. The stroller's structure then drives the entire stroller to fold. This design features a simple unlocking operation, facilitating easy and quick folding of the stroller.

[0045] The working principle of this application is as follows:

[0046] like Figure 3 , Figure 4 and Figure 7 As shown, when this application is in use, the third connector 3 and the second connector 2 are in the unfolded state, and the second locking mechanism is in the locked state. Simultaneously, the first connector 1 and the second connector 2 are in the retracted state, the locking hook 4021 of the first locking mechanism 4 locks into the locking groove 4011 of the locking part 401, and the traction cable 4033 is in the released state. Its sliding seat 4031 slides down to the side of the locking hook 4021 away from the locking part 401 under the action of the second reset member 4032, preventing it from exiting the locking groove 4011, thereby keeping the first connector 1 and the second connector 2 in the locked state. That is, the first locking mechanism 4 is in the locked state.

[0047] like Figure 6 , Figure 8 and Figure 9As shown, when unlocking is required, the second locking mechanism is first released. Then, the third connecting member 3 is rotated to fold and retract relative to the second connecting member 2. The traction cable 4033 pulls the sliding seat 4031 upward, causing it to move upward relative to the insertion part 201 and disengage from the locking hook 4021. At this time, the first connecting member 1 and the second connecting member 2 can extend and slide, causing the locking hook 4021 to disengage from the locking groove 4011, thus achieving unlocking. That is, during the folding process of the frame, the first locking mechanism 4 is automatically released to facilitate the folding of the entire vehicle in conjunction with the frame structure.

[0048] Alternatively, the unlocking structure can also be a first unlocking component installed on the first connector 1 or the second connector 2, which can directly pull the traction cable 4033. This scheme is not shown in the figure.

[0049] The first unlocking component and the second unlocking component can be a rotation unlocking component, a press unlocking component, or a slide unlocking component, etc. Since their structures are diverse and they are all conventional technologies in this technical field, no specific restrictions or descriptions are made here.

[0050] The first connecting member 1 and the second connecting member 2 in this application are telescopic structures. When the two are in the retracted state, they are locked together by a first locking mechanism 4. The first locking mechanism 4 adopts a method in which the elastic locking member 402 locks into the locking part 401. The elastic locking member 402 is controlled by the two-lock assembly 403 to control whether the elastic locking member 402 can disengage from the locking part 401, thereby realizing the unlocking or locking of the first connecting member 1 and the second connecting member 2. The structure is relatively novel, the locking is more reliable, and it has a simple unlocking operation function, which facilitates the purpose of easy and quick folding of the stroller.

[0051] As a preferred embodiment of the present invention, in the description of this specification, the reference to terms such as "preferred," "optional," etc., means that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0052] The above embodiments are only used to illustrate the detailed solutions of the present invention. The present invention is not limited to the above detailed solutions, that is, it does not mean that the present invention must rely on the above detailed solutions to be implemented. Those skilled in the art should understand that any improvements to the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. A telescopic rod locking mechanism, characterized in that: The device includes a first and a second connector that can slide relative to each other. A first locking mechanism is provided between the first and second connectors to lock them together when they are in a retracted state. The second connector has a plug-in portion that is inserted into the first connector and can slide relative to it. The first locking mechanism includes a locking part formed at the bottom of the plug-in portion, an elastic locking member movably connected to the bottom of the inner cavity of the first connector and lockable with the locking part, and a two-lock assembly that can move relative to the plug-in portion. The elastic locking member and the locking part are inclinedly engaged, and the two can achieve inclined sliding engagement through the sliding unfolding or sliding retracting movements of the first and second connectors, thereby causing the elastic locking member to disengage from or lock into the locking part. The first locking mechanism controls whether the elastic locking member can disengage from the locking part through the two-lock assembly, thereby unlocking or locking the first and second connectors.

2. The telescopic rod locking mechanism according to claim 1, characterized in that: The resilient locking device includes a locking hook rotatably connected to the bottom of the inner cavity of the first connector and a first reset member disposed between the locking hook and the first connector; the locking hook has a protruding locking tongue, and the locking part includes a locking groove corresponding to the locking tongue and a guide surface formed at its bottom for the locking tongue to slide into the locking groove.

3. The telescopic rod locking mechanism according to claim 2, characterized in that: The sliding mating surface of the latch is V-shaped, and it has an inlet slope and an outlet slope; the lock groove is V-shaped, and the guide surface at the bottom of the locking part can slide with the inlet slope of the latch.

4. The telescopic rod locking mechanism according to claim 1, characterized in that: The dual-lock assembly includes a sliding seat slidably disposed on the insertion portion of the second connector and a second reset member disposed between the sliding seat and the second connector; the sliding seat is connected to the unlocking structure via a traction cable, and the unlocking structure can release the lock of the first locking mechanism by driving the sliding seat to slide through the traction cable.

5. A telescopic rod locking mechanism according to claim 4, characterized in that: The unlocking structure is a first unlocking component that is installed on the first connector or the second connector and can directly pull the traction cable.

6. A telescopic rod locking mechanism according to claim 4, characterized in that: The unlocking structure includes a third connector rotatably mounted on the side of the second connector away from the first connector. One end of the traction cable is connected to the sliding seat, and the other end is directly or indirectly connected to the third connector. A second locking mechanism is provided between the third connector and the second connector to lock them when they are in the unfolded state. The third connector is provided with a second unlocking component for releasing the second locking mechanism. When the second unlocking component releases the second locking mechanism and the third connector is rotated to fold and retract relative to the second connector, the sliding seat can be slid by the traction cable to release the first locking mechanism.

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