Telescopic mechanism for connecting plugs and child car seat

Abstract

A telescopic mechanism (100) of a connection plug and a child car seat are disclosed. The telescopic mechanism (100) of the connection plug includes a plug connection rack (2) and a locking pin (3). The plug connection rack (2) is arranged on a base (1) of the child car seat so as to be slidable back and forth. The plug connection rack (2) has a plurality of first adjustment recesses (20a), which are arranged in order along the sliding direction of the plug connection rack (2). The locking pin (3) is movably supported so that the first end (31) of the locking pin (3) can be kept in a first locking state in which the first end (31) of the locking pin (3) extends into any one of the plurality of first adjustment recesses (20a). The first end (31) of the locking pin (3) has an inclined portion (301), which faces rearward.

Description

Cross-reference to Related Applications

[0001] This application claims priority to Chinese Patent Application No. 202110897085.8, titled "Telescopic Mechanism and Child Seat for Connecting a Plug", filed on August 5, 2021, the entire content of which is incorporated herein by reference. This is the national phase in Japan for the international application PCT / EP2022 / 072128, filed on August 5, 2022.

Technical Field

[0002] The present disclosure relates to a telescopic mechanism for a connection plug and a child seat.

Background Art

[0003] Current child seats generally employ an ISOFIX connection plug that is removably connected to the ISOFIX socket of a vehicle seat. Such a connection mode not only provides convenience for disassembling and assembling the child seat, but also ensures that the child seat is stably and securely supported on the vehicle seat. To make the ISOFIX connection plug of the child seat compatible with the ISOFIX sockets of different vehicles, the conventional ISOFIX connection plug is installed on the base of the child seat in an adjustable mode that can be telescoped via a telescopic mechanism.

[0004] Figure 1 shows a typical telescopic mechanism including a plug connection rack 2' and a locking pin 3'. The plug connection rack 2' may be slidably mounted on a child seat base (not shown), and the rear end of the plug connection rack 2' is configured to connect to an ISOFIX connection plug (not shown). The plug connection rack 2' has a number of holes 20' arranged sequentially along the front-rear direction. The locking pin 3' is elastically supported by a spring 35' and may be extendable and retractable in a direction perpendicular to the sliding direction of the plug connection rack 2'. The spring 35' is configured to keep the first end 31' of the locking pin 3' in a locked state, extending into any hole 20'. If it is necessary to adjust the position of the ISOFIX connection plug, the release mechanism first holds the locking pin 3' in a released state (shown in Figure 1) with the first end 31' retracted from the hole 20'. After the plug connection rack 2' is adjusted to the correct position, the release mechanism is released from the control of the locking pin 3', and the spring 35' automatically pushes the first end 31' of the locking pin 3' into the corresponding hole 20', thereby securing the ISOFIX connection plug in the correct position. If the position of the ISOFIX connection plug needs to be adjusted, such a retractable mechanism must be operated by the release mechanism to retract the locking pin 3' from the hole 20' so as not to interfere with the movement of the plug connection rack 2'. [Overview of the Initiative]

[0005] The purpose of this disclosure is to provide a telescopic mechanism for a connecting plug to facilitate the adjustment of the position of the connecting plug relative to the base of a child car seat. The disclosure also provides a child car seat to which the telescopic mechanism for the connecting plug is applied.

[0006] In one embodiment, the disclosure provides a telescopic mechanism for a connecting plug, comprising a plug connection rack and a locking pin. The plug connection rack is slidably mounted on the base of a child seat. The plug connection rack has a plurality of first adjustment recesses. The plurality of first adjustment recesses are arranged sequentially along the sliding direction of the plug connection rack. The locking pin is movably supported such that a first end of the locking pin can be held in a first locked state in which it extends into any one of the plurality of first adjustment recesses. The first end of the locking pin has a slanted portion which faces rearward. When the locking pin is in the first locked state, the slanted portion is in contact with the edge of any one of the plurality of first adjustment recesses.

[0007] Furthermore, each of the multiple first adjustment recesses has a straight edge that is configured to be in contact with the inclined portion.

[0008] Furthermore, the first end of the locking pin further includes a locking slot adjacent to the inclined portion. The plug connection rack is a tube. When the locking pin is in the first locked state, a portion of the tube wall located in the first adjustment recess of the plug connection rack is locked into the locking slot.

[0009] Furthermore, the plug connection rack further includes at least one second adjustment recess. The at least one second adjustment recess is located in front of the plurality of first adjustment recesses. The locking pin has a second locking state in which the first end of the locking pin extends into the second adjustment recess. When the locking pin is in the second locking state, the locking pin is configured to prevent the plug connection rack from moving backward and from moving forward by being retracted into the base.

[0010] Furthermore, the plug connection rack is further provided with at least one first retaining portion corresponding to at least one second adjustment recess. The locking pin includes a locking tongue and a cylindrical portion connected to each other. The locking tongue is located at the first end of the locking pin. The locking tongue has an inclined portion. The cylindrical portion is adaptable to cooperate with the first retaining portion to prevent the plug connection rack from being pulled in against the base and moving forward.

[0011] Furthermore, the first blocking portion is a first projection formed on the edge of the second adjustment recess.

[0012] Furthermore, the plug connection rack is a tube. The second adjustment recess is configured such that when the locking pin is in the second locking state, the inclined portion passes through the second adjustment recess and extends into the interior of the plug connection rack, while also being separated from the edge of the second adjustment recess.

[0013] Furthermore, the plug connection rack further includes at least one third adjustment recess. The at least one third adjustment recess is located behind the plurality of first adjustment recesses. The locking pin has a third locking state in which the first end of the locking pin extends into the third adjustment recess. When the locking pin is in the third locking state, the locking pin is configured to prevent the plug connection rack from moving backward and from moving forward by being retracted into the base.

[0014] Furthermore, the plug connection rack is further provided with at least one second blocking portion corresponding to at least one third adjustment recess. The locking pin includes a locking tongue and a cylindrical portion that are connected to each other. The locking tongue is located at the first end of the locking pin. The locking tongue has an inclined portion. The cylindrical portion is adaptable to cooperate with the second blocking portion to prevent the plug connection rack from being pulled in against the base and moving forward.

[0015] Furthermore, the second blocking portion is a second projection formed on the edge of the third adjustment recess.

[0016] Furthermore, the first adjustment recess is a hole or slot, and the connecting plug is installed at the rear end of the plug connection rack.

[0017] In another embodiment, the Disclosure provides a child seat comprising a base, a telescopic mechanism for the above-mentioned connecting plug, and a release mechanism configured to drive a locking pin to bias a first end of the locking pin to retract from any one of a plurality of first adjustment recesses.

[0018] The release mechanism also includes a swing rod, a pull handle, a return member, and an operating member. The swing rod includes a first arm, a second arm, and a first corner positioned between the first and second arms. The free end of the first arm is hinged to a locking pin. The first corner is hinged to a base. The free end of the second arm is hinged to the rear end of the pull handle. The front end of the pull handle is operably connected to an operating member. The operating member is adaptable to pull the pull handle to bias the swing rod to drive the first end of the locking pin to retract from one of a plurality of adjustment recesses. The return member is configured to bias the pull handle to its return position and to bias the locking pin to return to a first locked state.

[0019] Furthermore, an elongated hole is provided at the free end of the first arm, and a through hole is provided in the middle of the locking pin. A connecting bolt extends into the rectangular hole and the through hole, hinge-connecting the first arm to the locking pin.

[0020] In the telescopic mechanism provided by embodiments of the present disclosure, an inclined portion is defined on the first end of a locking pin, and the inclined portion is oriented rearward and adaptable to contact the edge of a first adjustment recess, thereby providing unidirectional restriction on the rearward extension of the plug connection rack. When a child seat is installed in a vehicle seat, it is usually necessary to shorten the exposed length L of the ISOFIX plug in order to firmly press the child seat against the vehicle seat. When a child seat to which a telescopic mechanism for a connection plug is applied is installed in a vehicle seat, and the first end of the locking pin extends into the first adjustment recess, the exposed length of the connection plug can be easily shortened by pushing the base rearward without having to operate the release mechanism, thereby firmly pressing the child seat against the vehicle seat and greatly simplifying the operation of adjusting the position of the connection plug. When the child seat is removed from the vehicle, the connecting plug is extended, and the first end of the locking pin is inserted into the first adjustment recess, there is no need to operate the release mechanism. The connecting plug can be easily retracted into the base by pushing it forward, thereby helping to reduce the packaging volume of the child seat and facilitating its storage and transport. [Brief explanation of the drawing]

[0021] [Figure 1] A schematic perspective view of a conventional telescopic mechanism with the locking pin in the released position is shown. [Figure 2] A schematic perspective view of an extension / retraction mechanism for a connecting plug according to one embodiment of the present disclosure is shown, with the locking pin in the unlocked state. [Figure 3] Figure 2 schematically shows a plan section of a partial structure of a child seat according to one embodiment of the present disclosure to which the telescopic mechanism for the connecting plug shown is applied, the locking pin is in a locked state, and the first end of the locking pin is inserted into the first adjustment recess. [Figure 4]A plan sectional view of a partial structure of a child seat according to an embodiment of the present disclosure to which a telescopic mechanism for a connection plug shown in FIG. 2 is applied is schematically shown, the locking pin is in a locked state, and the first end of the locking pin is inserted into the second adjustment recess. [Figure 5] A side view of a partial structure of a child seat according to an embodiment of the present disclosure is schematically shown, and the connection plug extends rearward with respect to the base. [Figure 6] A side view of a partial structure of a child seat according to an embodiment of the present disclosure is schematically shown, and the connection plug is retracted forward with respect to the base. [Figure 7] A perspective view of a telescopic mechanism for a connection plug according to another embodiment of the present disclosure is schematically shown, and the locking pin is in an unlocked state. [Figure 8] A perspective view of a telescopic mechanism for a connection plug according to still another embodiment of the present disclosure is schematically shown, and the locking pin is in an unlocked state. [Figure 9] A perspective view of a telescopic mechanism for a connection plug according to still another embodiment of the present disclosure is schematically shown, and the locking pin is in an unlocked state. [Figure 10] A plan sectional view of a partial structure of a child seat according to an embodiment of the present disclosure to which a telescopic mechanism for a connection plug shown in FIG. 9 is applied is schematically shown, the locking pin is in a locked state, and the first end of the locking pin is inserted into the first adjustment recess. [Figure 11] A plan sectional view of a partial structure of a child seat according to an embodiment of the present disclosure to which a telescopic mechanism for a connection plug shown in FIG. 9 is applied is schematically shown, the locking pin is in a locked state, and the first end of the locking pin is inserted into the second adjustment recess. [Figure 12] A perspective view of a plug connection rack of a telescopic mechanism for a connection plug according to still another embodiment of the present disclosure is schematically shown. [Figure 13] A perspective view of a partial structure of a child seat according to an embodiment of the present disclosure to which a telescopic mechanism for a connection plug shown in FIG. 8 is applied is schematically shown. [Figure 14] A perspective view of a partial structure of a child seat according to an embodiment of the present disclosure is schematically shown. [Explanation of Symbols]

[0022] 1 Base 2.2" Plug-in Rack 3,3' Locking pin 3a Locking tongue 3b Cylindrical part 5 Lock release mechanism 6 Operating Member 11 Load leg 20 Adjustment recess 20a First adjustment recess 20b Second adjustment recess 20c Third adjustment recess 20' hole 21 Connection Plug 23 First Blocking Section 25 Second Blocking Section 31,31' First end 32 Second end 35,35' spring 51 Oscillating Rod 52 Pull handle 6 Operating Member 61 connecting bolts 62, 63 Pin shaft 100 Contraction Mechanism 110 Decorative Cover 201 Straight edge 301 Slope 302 Locking slots 303 Through hole 304 Projecting edge 511 First Arm 512 Second Arm 513 First corner 5110 Long hole F, R, V arrows L Length X1 First axial dimension X2 Second axial dimension [Modes for carrying out the invention]

[0023] Figure 2 shows a perspective view of a telescopic mechanism 100 (hereinafter also referred to as the telescopic mechanism) for a connecting plug according to one embodiment of the present disclosure, the telescopic mechanism 100 including a plug connecting rack 2 and a locking pin 3. Referring to Figures 2 to 6, the plug connecting rack 2 is slidably positioned on the base 1 of the child seat, and the locking pin 3 is configured to lock the plug connecting rack 2. The connection method between the plug connecting rack 2 and the base 1 can be referenced from the prior art. A load leg 11 is installed at the front end of the base 1, and the lower end of the load leg 11 is configured to abut against the floor surface of the vehicle. The rear end of the plug connecting rack 2 is configured to accommodate a connecting plug 21, which is, for example, an ISOFIX plug or any other compatible plug. Unless otherwise specified, terms indicating directions such as "front" and "rear" in embodiments of the present disclosure refer to the directions shown in the drawings, and arrows F and R in each drawing indicate the front and rear directions, respectively. These directional terms are used solely to clarify the descriptions of the embodiments of this disclosure, and are not intended to improperly limit the scope of protection of this disclosure.

[0024] Referring to Figure 2, the plug connection rack 2 includes a plurality of adjustment recesses 20. The plurality of adjustment recesses 20 are arranged sequentially along the sliding direction (i.e., the front-rear direction) of the plug connection rack 2. In Figure 2, the adjustment recess 20 located at the front end is the second adjustment recess, indicated by, for example, reference numeral 20b, and one or more adjustment recesses 20 located behind the second adjustment recess 20b are the first adjustment recesses, indicated by, for example, reference numeral 20a. Each adjustment recess 20 is, for example, a hole. In another embodiment, each adjustment recess 20 is, for example, a slot. The number of first adjustment recesses 20a and the number of second adjustment recesses 20b are determined according to the actual needs.

[0025] The locking pin 3 is movably supported so that its first end 31 can be kept in a locked state extending into the adjustment recess 20. The locking pin 3 is configured to extend and retract in the axial direction. The axial direction of the locking pin 3 is substantially perpendicular to the sliding direction of the plug connection rack 2, thereby allowing the first end 31 of the locking pin 3 to extend into any adjustment recess 20 (i.e., the locking pin 3 to switch from an unlocked state to a locked state) or to retract from any adjustment recess 20 (i.e., the locking pin 3 to switch from a locked state to an unlocked state). For example, in some embodiments, a protruding edge 304 is provided adjacent to the second end 32 of the locking pin 3. One end of the spring 35 is sleeve-fixed to the second end of the locking pin 3 and limited by the protruding edge 304, and the other end of the spring 35 is limited by any other suitable structure on the base 1, for example. The axial movement of the locking pin 3 may be guided by any suitable structure, so that the spring 35 keeps the locking pin 3 locked, and under force, the locking pin 3 can compress the spring 35 and switch to the unlocked state. Referring to Figure 5, when the locking pin 3 is locked, the cooperation between the first end 31 of the locking pin 3 and the adjustment recess 20 can prevent the plug connection rack 2 from extending backward relative to the base 1. At this time, even if the ISOFIX plug is pulled directly backward, the exposed length L of the ISOFIX plug relative to the base 1 does not change.

[0026] Referring to Figures 2, 3, and 5, the first end 31 of the locking pin 3 has an inclined portion 301. The inclined portion 301 faces rearward and is adaptable to contact the edge of the first adjustment recess 20a, so that when the plug connection rack 2 is pushed forward or the base 1 is pushed backward, the edge of the first adjustment recess 20a presses against the inclined portion 301, applying stress to the first end 31 of the locking pin 3. Under stress, the first end 31 of the locking pin 3 presses against the spring 35 and retracts from the first adjustment recess 20a, thereby allowing the plug connection rack 2 to be pulled in against the base 1 and move forward. At this time, the ISOFIX plug is pulled in toward the bottom of the base 1, and the exposed length L of the ISOFIX plug relative to the base 1 is shortened. In some embodiments, the locking pin 3 includes a locking tongue 3a and a cylindrical portion 3b that are connected to each other. The locking tongue portion 3a is positioned on the first end portion 31 of the locking pin 3, and an inclined portion 301 is formed on the locking tongue portion 3a.

[0027] When a child seat is installed in a vehicle seat, first the ISOFIX plug engages with the ISOFIX socket in the vehicle seat, then the fore-aft position of the ISOFIX plug is adjusted, the backrest of the child seat is pressed firmly against the backrest of the vehicle seat, and the load legs 11 are pressed firmly against the vehicle floor. In the conventional telescopic mechanism, when adjusting the fore-aft position of the ISOFIX plug (extending backward or retracting forward), it is necessary to operate the locking pin in an unlocked state in order to maintain the locking pin. After the ISOFIX plug has moved to the appropriate position, the control of the locking pin by the locking release mechanism is released, and the operation of adjusting the position of the ISOFIX plug becomes relatively inconvenient.

[0028] In the telescopic mechanism provided by embodiments of the present disclosure, the inclined portion 301 is defined on the first end 31 of the locking pin 3, and the inclined portion 301 is adaptable to contact the edge of the first adjustment recess 20a. When the first end 31 of the locking pin 3 is inserted into the first adjustment recess 20a, the locking pin 3 can provide unidirectional restriction on the rearward extension of the plug connection rack 2, that is, the plug connection rack 2 can support an ISOFIX plug so as to automatically retract forward relative to the base 1 to shorten the exposed length L of the ISOFIX plug, but cannot support an ISOFIX plug so as to automatically extend rearward relative to the base 1 to lengthen the exposed length L of the ISOFIX plug. In the telescopic mechanism of embodiments of the present disclosure, if it is necessary to lengthen the exposed length L of the ISOFIX plug, it is necessary to operate a release mechanism to maintain the locking pin 3 in an unlocked state.

[0029] When a child seat is installed in a vehicle seat, it is usually necessary to shorten the exposed length L of the ISOFIX plug in order to firmly press the child seat against the vehicle seat. Once the child seat is installed in place, it is not possible to freely lengthen the exposed length L of the ISOFIX plug. In the case of the telescopic mechanism provided by the embodiments of this disclosure, after the child seat is installed in the vehicle seat, when the first end 31 of the locking pin 3 extends into the first adjustment recess 20a (i.e., when the locking pin 3 is in the first locked state), as shown in Figure 5, the exposed length L of the ISOFIX plug can be easily shortened by pushing the base 1 backward (for example, by pressing the decorative cover 110 against the load leg 11) without having to operate the release mechanism, thereby firmly pressing the child seat against the vehicle seat and greatly simplifying the operation of adjusting the position of the ISOFIX plug. When the child seat is removed from the vehicle and the ISOFIX plug is in the extended state shown in Figure 5, for example, if the first end 31 of the locking pin 3 is inserted into the first adjustment recess 20a, the ISOFIX plug can be easily retracted into the base 1 (see Figure 6) by pushing it forward, without needing to operate the release mechanism. This helps to reduce the packaging volume of the child seat and facilitates its storage and transport.

[0030] Referring to Figure 2, all or part of the adjustment recess 20 may have a straight edge 201 configured to contact the inclined portion 301. For example, the first adjustment recess 20a is provided with a straight edge 201. The contact of the straight edge 201 with the inclined portion 301 allows force to be directly applied to the first end 31 of the locking pin 3, making it easier to pull the plug connection rack 2 forward relative to the base 1.

[0031] In some embodiments, the first end 31 of the locking pin 3 further includes a locking slot 302 adjacent to the inclined portion 301. The plug connection rack 2 is a tube. When the locking pin 3 is locked, a portion of the tube wall located in the adjustment recess 20 of the plug connection rack 2 engages with the locking slot 302, thereby further improving the ability to restrict the rearward extension of the plug connection rack 2 relative to the base 1. The transition between the edge of the locking slot 302 and the circumferential surface of the locking pin 3 is realized by an arcuate or tapered surface so as not to affect the axial movement of the first end 31 of the locking pin 3 when the first end 31 of the locking pin 3 needs to retract from the adjustment recess 20.

[0032] Referring to Figures 2 and 4, in some embodiments, the plug connection rack 2 is provided with a first blocking portion 23. The first blocking portion 23 corresponds to a second adjustment recess 20b, and thereafter, when the first end 31 of the locking pin 3 is inserted into the second adjustment recess 20b (i.e., when the locking pin 3 is in the second locking state), the first blocking portion 23 cooperates with the cylindrical portion 3b of the locking pin 3, thereby preventing the plug connection rack 2 from being pulled in and moving forward relative to the base 1. In this way, when the user is installing the child seat on the vehicle seat, the first end 31 of the locking pin 3 is inserted into the second adjustment recess 20b, and the exposed length L of the ISOFIX plug is maintained at its longest, so that the ISOFIX plug is not pulled in when it is inserted into the ISOFIX socket of the vehicle seat, and further avoids the situation in which the ISOFIX plug and the ISOFIX socket cannot be connected due to the ISOFIX plug being pulled in. Furthermore, when engaging the ISOFIX plug with the ISOFIX socket, the locking release mechanism is activated to retract the locking pin 3 from the second adjustment recess 20b, and then the locking release mechanism is released and the base 1 is pushed backward, thereby easily shortening the exposed length (extended length) L of the ISOFIX plug relative to the base 1.

[0033] In some embodiments, the first blocking portion 23 is a first projection formed on the edge of the second adjustment recess 20b. The first projection may be formed, for example, by machining the wall of the second adjustment recess 20b. In other embodiments, the first blocking portion 23 may be arranged in other ways. For example, a first bump may be welded to the plug connection rack 2, and the first bump may function as the first blocking portion 23.

[0034] In some embodiments, the first blocking portion 23 may not be additionally provided by designing the shape and / or size of the second adjustment recess 20b, and it may also be achieved that when the locking pin 3 is in the second locking state, the locking pin 3 prevents the plug connection rack 2 from moving backward and from being pulled inward relative to the base 1.

[0035] For example, referring to Figure 9, the plug connection rack 2 is a tube. The first adjustment recess 20a is a relatively small hole with a straight edge 201, and the second adjustment recess 20b is a relatively large round hole. Referring to Figure 10, when the locking pin 3 is in the first locking state, the inclined portion 301 contacts the straight edge 201 of the first adjustment recess 20a, preventing the locking pin 3 from continuing to extend into the interior of the plug connection rack 2. In this case, the plug connection rack 2 can transport the ISOFIX plug 21 so that it is automatically pulled forward relative to the base, but it cannot transport the ISOFIX plug 21 so that it is automatically extended backward relative to the base. Referring to Figure 11, when the locking pin 3 is in the second locking state, the edge of the second adjustment recess 20b does not prevent the locking pin 3 from extending inward into the plug connection rack 2, and the inclined portion 301 extends inward into the plug connection rack 2 through the second adjustment recess 20b and is separated from the edge of the second adjustment recess 20b. In this case, the cylindrical portion 3b of the locking pin 3 can cooperate with the edge of the second adjustment recess 20b, thereby preventing the plug connection rack 2 from moving backward and from being pulled inward relative to the base 1.

[0036] Referring to Figure 12, in some embodiments, the second adjustment recess 20b is similar to the first adjustment recess 20a and is also a hole with a straight edge 201. However, in the axial direction of the plug connection rack 2, the second axial dimension X2 of the second adjustment recess 20b is larger than the first axial dimension X1 of the first adjustment recess 20a, so that when the locking pin 3 is in the first locking state, the locking pin 3 can only extend to a position where the inclined portion 301 contacts the straight edge 201 of the first adjustment recess 20a, thereby allowing the plug connection rack 2 to be pulled forward relative to the base 1. When the locking pin 3 is in the second locking state, the locking pin 3 may extend to a position where the inclined portion 301 of the locking pin 3 extends completely inward into the plug connection rack 2 and separates from the edge of the second adjustment recess 20b, thereby preventing the plug connection rack 2 from extending backward and moving forward relative to the base 1.

[0037] Referring to Figure 7, in some embodiments, the adjustment recess 20 further includes a third adjustment recess 20c located behind the first adjustment recess 20a. The plug connection rack 2 is further provided with a second blocking portion 25. The second blocking portion 25 corresponds to the third adjustment recess 20c. When the first end 31 of the locking pin 3 is inserted into the third adjustment recess 20c (i.e., when the locking pin 3 is in the third locking state), the second blocking portion 25 cooperates with the cylindrical portion 3b of the locking pin 3 to prevent the plug connection rack 2 from continuing to move forward in retraction relative to the base 1, thereby preventing the plug connection rack 2 from moving backward and from moving forward in retraction relative to the base 1.

[0038] As shown in Figure 7, when the first end 31 of the locking pin 3 extends into the third adjustment recess 20c, the exposed length L of the ISOFIX plug is minimized, and the second blocking portion 25 works in cooperation with the cylindrical portion 3b of the locking pin 3 to prevent the plug connection rack 2 from continuing to be pulled forward relative to the base 1, making it easier for the user to confirm that the ISOFIX plug has been pulled in to its limit position. The second blocking portion 25 is, for example, a second projection formed on the edge of the third adjustment recess 20c. The second projection is formed, for example, by machining the wall of the third adjustment recess 20c. In other embodiments, the second blocking portion 25 is arranged in a different manner. For example, a second bump is welded to the plug connection rack 2, and the second bump functions as the second blocking portion 25. In other embodiments, the number of third adjustment recesses 20c may be set according to the actual needs.

[0039] It should be noted that the telescopic mechanism 100 provided by embodiments of the present disclosure may also have various modifications to allow the plug connection rack 2 to be pulled forward relative to the base 1 to adjust the exposed length L of the ISOFIX plug without operating the release mechanism, as long as it has an inclined portion 301 that can be adapted so that the first end 31 of the locking pin 3 contacts the edge of the first adjustment recess 20a. For example, referring to Figures 8 and 13, in some embodiments all first adjustment recesses 20a are round holes of the same structure. Or, in some embodiments all first adjustment recesses 20a are rectangular holes, and so on.

[0040] Embodiments of the present disclosure also provide a child seat which includes a base 1, a telescopic mechanism for the connecting plug 100 described in the above embodiments, and a release mechanism 5 configured to drive a locking pin 3 and bias the first end 31 of the locking pin 3 to retract from the adjustment recess 20.

[0041] Referring to Figures 3, 5, and 14, in some embodiments, the lock release mechanism 5 includes a swing rod 51, a pull handle 52, and a return member. The swing rod 51 is L-shaped and has a first arm 511, a second arm 512, and a first corner 513 positioned between the first arm 511 and the second arm 512. The free end of the first arm 511 is hinged to a locking pin 3 by a connecting bolt 61. The first corner 513 is hinged to the base 1 by a pin shaft 62. The free end of the second arm 512 is hinged to the rear end of the pull handle 52 by a pin shaft 63. The front end of the pull handle 52 is operably connected to, for example, an operating member 6. The operating member 6 is, for example, a button provided on a decorative cover 110. When the operating member 6 is pressed, it can pull the pull handle 52 and move forward, and the pull handle 52 is adaptable to drive a corresponding oscillating rod 51 to rotate around the pin shaft 62 via a second arm 512 in the direction indicated by arrow V, and the first arm 511 can drive the first end 31 of the locking pin 3 to retract from the adjustment recess 20. When the operating member 6 is released, a return member may return the pull handle 52 and the operating member 6 and then the oscillating rod 51 to return the locking pin 3 to a locked position in which the first end 31 extends into the corresponding adjustment recess 20, i.e., return the locking pin 3 to a first locked state, a second locked state, or a third locked state.

[0042] In some embodiments, the return member includes a spring 35. In this case, when the operating member 6 is released, the spring 35 drives the locking pin 3 to move to the locked position, the movement of the locking pin 3 rotates the oscillating rod 51, and the oscillating rod 51 drives the pull handle 52 and the operating member 6 to return to their original position.

[0043] Referring to Figures 2, 3, and 14, in some embodiments, the free end of the first arm 511 is provided with an elongated hole 5110, and the middle portion of the locking pin 3 is provided with a through hole 303, and the connecting bolt 61 extends into the elongated hole 5110 and the through hole 303 to hinge the first arm with the locking pin. In this way, the sliding movement between the connecting bolt 61 and the rectangular hole 5110 makes it possible to convert the rotation of the oscillating rod 51 into the axial movement of the locking pin 3.

[0044] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features of the above embodiments are described. However, as long as there are no inconsistencies between these combinations of technical features, all combinations of these technical features should fall within the scope described herein.

[0045] 1 Base 2.2" Plug-in Rack 3,3' Locking pin 3a Locking tongue 3b Cylindrical part 5 Lock release mechanism 6 Operating Member 11 Load leg 20 Adjustment recess 20a First adjustment recess 20b Second adjustment recess 20c Third adjustment recess 20' hole 21 Connection Plug 23 First Blocking Section 25 Second Blocking Section 31,31' First end 32 Second end 35,35' spring 51 Oscillating Rod 52 Pull handle 6 Operating Member 61 connecting bolts 62, 63 Pin shaft 100 stretchable mechanism 110 Decorative Cover 201 Straight edge 301 Slope 302 Locking slots 303 Through hole 304 Projecting edge 511 First Arm 512 Second Arm 513 First corner 5110 Long hole F, R, V arrows L Length X1 First axial dimension X2 Second axial dimension

Claims

1. A telescopic mechanism (100) for a connecting plug, A plug connection rack (2) is slidably positioned on the base (1) of a child seat, and comprises a plurality of first adjustment recesses (20a), wherein the plurality of first adjustment recesses (20a) are arranged sequentially along the sliding direction of the plug connection rack (2), A locking pin (3) is movably supported such that a first end (31) of the locking pin (3) can be maintained in a first locked state that extends into any one of the plurality of first adjustment recesses (20a), and the first end (31) of the locking pin (3) has an inclined portion (301) with the inclined portion (301) facing rearward, Equipped with, When the locking pin (3) is in the first locked state, the inclined portion (301) contacts the edge of any one of the plurality of first adjustment recesses (20a), The plug connection rack (2) further comprises at least one second adjustment recess (20b), wherein the at least one second adjustment recess (20b) is located in front of the plurality of first adjustment recesses (20a), The locking pin (3) has a second locking state in which the first end (31) of the locking pin (3) extends into the second adjustment recess (20b), When the locking pin (3) is in the second locking state, the locking pin (3) is configured to prevent the plug connection rack (2) from moving backward and from being pulled in relative to the base (1) and moving forward. Telescoping mechanism (100).

2. The telescopic mechanism for a connecting plug according to claim 1, wherein each of the plurality of first adjustment recesses (20a) has a straight edge (201) configured to contact the inclined portion (301).

3. A locking slot (302) is formed on the side of the first end (31) of the locking pin (3) opposite to the inclined portion (301), and the locking slot (302) is configured to engage with the first adjustment recess. The plug connection rack (2) is a tube, When the locking pin (3) is in the first locked state, a portion of the tube wall located in the first adjustment recess (20a) of the plug connection rack (2) is locked into the locking slot (302). A telescopic mechanism for a connecting plug according to claim 1.

4. The plug connection rack (2) is further provided with at least one first blocking portion (23) corresponding to the at least one second adjustment recess (20b), The locking pin (3) comprises a locking tongue (3a) and a cylindrical portion (3b) that are connected to each other, the locking tongue (3a) being positioned at the first end (31) of the locking pin (3), the locking tongue (3a) having the inclined portion (301) formed thereon, and the cylindrical portion (3b) being adaptable to cooperate with the first blocking portion (23) to prevent the plug connection rack (2) from being pulled in against the base (1) and moving forward. A telescopic mechanism for a connecting plug according to claim 1.

5. The telescopic mechanism for a connecting plug according to claim 4, wherein the first blocking portion (23) is a first projection formed on the edge of the second adjustment recess (20b).

6. The plug connection rack (2) is a tube, The second adjustment recess (20b) is configured such that when the locking pin (3) is in the second locking state, the inclined portion (301) passes through the second adjustment recess (20b) and extends into the interior of the plug connection rack (2), and does not come into contact with any edge of the second adjustment recess (20b). A telescopic mechanism for a connecting plug according to claim 1.

7. The plug connection rack (2) further comprises at least one third adjustment recess (20c), the at least one third adjustment recess (20c) being located behind the plurality of first adjustment recesses (20a), The locking pin (3) has a third locking state in which the first end (31) of the locking pin (3) extends into the third adjustment recess (20c), When the locking pin (3) is in the third locking state, the locking pin (3) is configured to prevent the plug connection rack (2) from moving backward and from being pulled in relative to the base (1) and moving forward. A telescopic mechanism for a connecting plug according to any one of claims 1 to 3.

8. The plug connection rack (2) is further provided with at least one second blocking portion (25) corresponding to the at least one third adjustment recess (20c), The locking pin (3) comprises a locking tongue portion (3a) and a cylindrical portion (3b) that are connected to each other. The locking tongue (3a) is positioned on the first end (31) of the locking pin (3), The locking tongue portion (3a) has the inclined portion (301) formed therein. The cylindrical portion (3b) is adaptable to cooperate with the second blocking portion (25) to prevent the plug connection rack (2) from being pulled in relative to the base (1) and moving forward. A telescopic mechanism for a connecting plug according to claim 7.

9. The telescopic mechanism for a connecting plug according to claim 8, wherein the second blocking portion (25) is a second projection formed on the edge of the third adjustment recess (20c).

10. The first adjustment recess (20a) is a hole or a slot, or The aforementioned connection plug (21) is installed at the rear end of the plug connection rack (2). A telescopic mechanism for a connecting plug according to any one of claims 1 to 3.

11. A child seat comprising a base (1), an extension / retraction mechanism for a connecting plug (21) according to any one of claims 1 to 3, and a release mechanism (5) configured to drive the locking pin (3) to bias the first end (31) of the locking pin (3) so as to retract from any one of the plurality of first adjustment recesses (20a).

12. The lock release mechanism (5) comprises a swing rod (51), a pull handle (52), a return member, and an operating member (6). The oscillating rod (51) comprises a first arm (511), a second arm (512), and a first corner portion (513) positioned between the first arm (511) and the second arm (512), wherein the free end of the first arm (511) is hinged to the locking pin (3), the first corner portion (513) is hinged to the base (1), and the free end of the second arm (512) is hinged to the rear end of the pull handle (52). The front end of the pull handle (52) is operably connected to the operating member (6), The operating member (6) is adaptable to pull the pull handle (52) in order to pull the swing rod (51) to drive the first end (31) of the locking pin (3) to retract from any one of the plurality of first adjustment recesses (20a), The return member is configured to bias the pull handle (52) to its return position and to bias the locking pin (3) to its first locked state. The child car seat according to claim 11.

13. The free end of the first arm (511) is provided with an elongated hole (5110), and the middle portion of the locking pin (3) is provided with a through hole (303). The connecting bolt (61) extends into the elongated hole (5110) and the through hole (303), hinge-connecting the first arm (511) to the locking pin (3). The child car seat according to claim 12.

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