CN215361054U - Supporting leg telescoping device and child safety seat - Google Patents

Abstract

The utility model discloses a supporting leg telescopic device and a child safety seat, and relates to the technical field of safety seats. The supporting leg telescopic device comprises a shell, a release piece, an outer tube, a locking piece and a locking mechanism, wherein the shell is sleeved on the outer wall of the outer tube, the release piece, the locking piece and the locking mechanism are arranged inside the outer tube, the release piece is fixedly connected with the shell, and the release piece moves along the length direction of the outer tube to control the locking piece and the locking mechanism to be locked or separated so as to adjust the relative position between the shell and the outer tube. The locking piece and the locking mechanism can be matched with each other, the unlocking piece is used for controlling the locking piece, and the locking piece is controlled to be close to or far away from the locking mechanism to realize locking or separation between the locking piece and the locking mechanism. The supporting leg telescopic device controls the releasing and locking piece inside the outer pipe to move by pulling the shell, so that the locking piece is locked or separated from the locking mechanism, the relative position between the shell and the outer pipe is adjusted, the length of the supporting leg telescopic device is changed, and the supporting leg telescopic device is simple in structure and convenient to stretch.

Description

Supporting leg telescoping device and child safety seat

Technical Field

The utility model relates to the technical field of child safety seats, in particular to a supporting leg telescopic device and a child safety seat.

Background

The safety seat is a seat tied on a car seat, has car accessory equipment with a constraint protection function, is specially designed for children with different weights (or age groups), and can effectively improve the riding safety of the children. In the event of a car crash or sudden deceleration, the impact force on the child can be reduced and the child's body movement can be restricted to mitigate injury to them.

The supporting leg that supports with the vehicle bottom face is generally equipped with in the front of safety seat below, can increase safety seat's fastness, improves the security. However, the existing supporting leg is complex in structure and inconvenient in telescopic operation, and the application is particularly provided in view of the problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a supporting leg telescopic device and a safety seat, and aims to solve the technical problem that the supporting leg is not telescopic conveniently in the prior art.

The embodiment of the utility model is realized by the following steps:

in one aspect of the embodiment of the utility model, a support leg telescoping device is provided, which comprises a shell, an unlocking piece, an outer tube, a locking piece and a locking mechanism, wherein the shell is sleeved on the outer wall of the outer tube, the unlocking piece, the locking piece and the locking mechanism are arranged in the outer tube, the unlocking piece is fixedly connected with the shell, and the unlocking piece moves along the length direction of the outer tube to control the locking piece and the locking mechanism to be locked or separated so as to adjust the relative position between the shell and the outer tube.

Optionally, the locking mechanism includes a fixing member, an inner shift pipe, a first spring and a second spring, the inner shift pipe is fixedly connected to the outer pipe, the fixing member is disposed between the unlocking member and the inner shift pipe, a through hole and a groove are disposed on a side wall of the fixing member, the locking member slides in the through hole and is locked or separated from the inner shift pipe under the control of the unlocking member, the first spring and the second spring are respectively fixed on two side walls opposite to the groove, a baffle is disposed on the unlocking member, and the baffle is disposed between the first spring and the second spring and is fixedly connected to the first spring and the second spring.

Optionally, the support leg extension device further comprises an inner tube disposed between the release member and the outer tube, and the inner tube is fixedly connected to the fixing member.

Optionally, the locking element is provided with a flange, and the unlocking element is provided with a track, wherein the flange slides in the track to be close to or far away from the inner gear pipe.

Optionally, the outer wall of the inner gear pipe is provided with a first rack extending along the length direction of the inner gear pipe, one side of the locking piece facing the inner gear pipe is provided with a second rack matched with the first rack, and the second rack is inserted into the first rack to fix the locking piece on the inner gear pipe.

Optionally, the first racks include two, the two first racks are oppositely disposed on two sides of the inner gear tube, the locking member includes two, and the two second racks on the two locking members are respectively matched with the two first racks.

Optionally, an inner gear pipe fixing piece is arranged at the end of the inner gear pipe, a slide way for allowing the inner gear pipe fixing piece to slide is arranged on the fixing piece, one end of the slide way is located at a first end portion, close to the groove, of the fixing piece, and the other end of the slide way is located between the first end portion and the through hole.

Optionally, the support leg extension device further comprises a foot pad disposed at an end of the housing and the release member, and the housing and the release member are fixedly connected through the foot pad.

Optionally, an inner tube fixing part is arranged at an end of the inner tube, a third spring is arranged between the inner tube fixing part and the foot pad, and the stretching direction of the third spring is parallel to the length direction of the inner tube.

According to another aspect of the embodiments of the present invention, a child safety seat is provided, which includes the above-mentioned support leg extension device.

The embodiment of the utility model has the beneficial effects that:

the embodiment of the utility model provides a supporting leg telescopic device which comprises a shell, an unlocking piece, an outer tube, a locking piece and a locking mechanism, wherein the shell is sleeved on the outer wall of the outer tube, the unlocking piece, the locking piece and the locking mechanism are arranged in the outer tube, the unlocking piece is fixedly connected with the shell, and the unlocking piece moves along the length direction of the outer tube to control the locking piece and the locking mechanism to be locked or separated so as to adjust the relative position between the shell and the outer tube. The outer casing is arranged outside the outer pipe and can move up and down along the length direction of the outer pipe, and the total length of the combined outer casing and the outer pipe is the length of the supporting leg telescopic device. The shell and the outer tube are hollow, and together form a containing space for containing the unlocking piece, the locking piece and the locking mechanism. The locking piece and the locking mechanism can be matched with each other, the unlocking piece is used for controlling the locking piece, and the locking piece is controlled to be close to or far away from the locking mechanism to realize locking or separation between the locking piece and the locking mechanism. The release piece is fixedly connected with the shell, and the release piece in the outer tube can be driven to move by pulling the shell to further control the locking piece and the locking mechanism. When the locking piece is matched with the locking mechanism to realize locking, the relative position between the outer pipe and the shell is unchanged, and the integral length of the supporting leg telescopic device is unchanged; when the locking piece is disengaged from the locking mechanism and separated from the locking mechanism, the shell can freely slide relative to the outer tube so as to change the overall length of the supporting leg telescopic device. The supporting leg telescopic device controls the releasing and locking piece inside the outer pipe to move by pulling the shell, so that the locking piece is locked or separated from the locking mechanism, the relative position between the shell and the outer pipe is adjusted, the length of the supporting leg telescopic device is changed, and the supporting leg telescopic device is simple in structure and convenient to stretch.

According to another aspect of the embodiment of the utility model, a child safety seat is provided, which comprises the support leg telescopic device. When the child safety seat is used, the supporting leg telescopic device on the child safety seat can be abutted to the bottom surface of the vehicle through adjusting the length, the child safety seat is convenient to install, good in firmness and high in safety.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of a supporting leg retractor device in a fully retracted state according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of A in FIG. 1;

FIG. 3 is an enlarged view of a portion B of FIG. 1;

FIG. 4 is a schematic structural diagram of a support leg retractor according to an embodiment of the present invention in an extended state;

FIG. 5 is an enlarged view of a portion of C in FIG. 4;

FIG. 6 is an enlarged partial view of D in FIG. 4;

FIG. 7 is a second schematic structural view of the leg stretching device of the embodiment of the present invention in an extended state;

FIG. 8 is an enlarged partial view of E in FIG. 7;

FIG. 9 is an enlarged partial view of F in FIG. 7;

FIG. 10 is a third schematic structural view of a support leg retractor according to an embodiment of the present invention in an extended state;

FIG. 11 is an enlarged partial view of G of FIG. 10;

FIG. 12 is an enlarged partial view of H of FIG. 10;

FIG. 13 is a fourth schematic structural view of the telescopic device for supporting legs according to the embodiment of the present invention in an extended state;

FIG. 14 is an enlarged partial view of I in FIG. 13;

FIG. 15 is an enlarged partial view of J of FIG. 13;

FIG. 16 is a fifth schematic view of the telescopic device for supporting legs according to the embodiment of the present invention in an extended state;

FIG. 17 is an enlarged partial view of K in FIG. 16;

FIG. 18 is an enlarged partial view of L of FIG. 16;

FIG. 19 is a schematic view of a release member and a locking member of a leg extension apparatus according to an embodiment of the present invention.

Icon: 100-support leg telescoping device; 110-a housing; 120-a release member; 121-a baffle; 122-track; 130-an outer tube; 140-a locking mechanism; 141-a fixing member; 1411-a via; 1412-groove; 1413-a slide; 142-a locking element; 1421-flange; 1422 — second rack; 143-inner gear tube; 1431 — first rack; 144-a first spring; 145-a second spring; 150-inner tube; 160-inner gear tube fixing piece; 170-foot pad; 180-inner tube fixing piece.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the utility model is used, it is only for convenience of describing the present invention and simplifying the description, but it is not necessary to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation and be operated, and thus, it should not be construed as limiting the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

Referring to fig. 1 to 3, the embodiment provides a support leg telescoping device 100, which includes a housing 110, a release member 120, an outer tube 130, a locking member 142 and a locking mechanism 140, wherein the housing 110 is sleeved on an outer wall of the outer tube 130, the release member 120, the locking member 142 and the locking mechanism 140 are disposed inside the outer tube 130, the release member 120 is fixedly connected to the housing 110, and the release member 120 moves along a length direction of the outer tube 130 to control the locking member 142 and the locking mechanism 140 to be locked or separated so as to adjust a relative position between the housing 110 and the outer tube 130.

The outer shell 110 is sleeved outside the outer tube 130 and can move up and down along the length direction of the outer tube 130, and the total length of the combined outer shell 110 and the outer tube 130 is the length of the support leg telescopic device 100. The housing 110 and the outer tube 130 are hollow inside to form a receiving space for receiving the unlocking member 120, the locking member 142 and the locking mechanism 140. The locking element 142 and the locking mechanism 140 can be engaged with each other, and the release element 120 is used to control the locking element 142, and the locking element 142 and the locking mechanism 140 can be locked or separated by controlling the locking element 142 to approach or separate from the locking mechanism 140. The locking member 120 is fixedly connected to the housing 110, and pulling the housing 110 can drive the locking member 120 in the outer tube 130 to move, thereby controlling the locking member 142 and the locking mechanism 140. When the locking piece 142 is matched with the locking mechanism 140 to realize locking, the relative position between the outer tube 130 and the shell 110 is unchanged, and the overall length of the support leg telescopic device 100 is unchanged; when the locking element 142 is disengaged from the locking mechanism 140 and separated from each other, the housing 110 can slide freely relative to the outer tube 130 to change the overall length of the support leg extension 100.

The supporting leg extension device 100 controls the release piece 120 in the outer tube 130 to move by pulling the shell 110, so that the locking piece 142 is locked or separated from the locking mechanism 140, the relative position between the shell 110 and the outer tube 130 is adjusted, the length of the supporting leg extension device 100 is changed, and the structure is simple and the extension is convenient.

Referring to fig. 1 to 3, optionally, the locking mechanism 140 includes a fixing member 141, an inner position tube 143, a first spring 144, and a second spring 145, the inner position tube 143 is fixedly connected to the outer tube 130, the fixing member 141 is disposed between the release member 120 and the inner position tube 143, a through hole 1411 and a groove 1412 are disposed on a sidewall of the fixing member 141, the locking member 142 slides in the through hole 1411 and is locked or separated from the inner position tube 143 under the control of the release member 120, the first spring 144 and the second spring 145 are respectively fixed on two sidewalls opposite to the groove 1412, the release member 120 is disposed with a blocking plate 121, and the blocking plate 121 is disposed between the first spring 144 and the second spring 145 and is fixedly connected to the first spring 144 and the second spring 145.

The fixing element 141 is used for installing the locking element 142 and movably connected with the releasing element 120, a through hole 1411 is formed in the fixing element 141, the locking element 142 is arranged in the through hole 1411, and the locking element 142 is controlled by the releasing element 120 to slide back and forth in the through hole 1411 so as to be locked with or separated from the locking mechanism 140. In addition, the fixing member 141 is further provided with a groove 1412, the baffle 121 of the unlocking member 120 extends into the groove 1412 to divide the groove 1412 into two parts, which are respectively used for accommodating the first spring 144 and the second spring 145, and one end of each of the first spring 144 and the second spring 145 is fixedly connected with the groove 1412 (i.e. fixedly connected with the fixing member 141), and the other end of each of the first spring 144 and the second spring 145 is fixedly connected with the baffle 121, so that the unlocking member 120 can move a preset distance relative to the fixing member 141 in the moving process, and can drive the fixing member 141 to move together under the action of the spring force after moving the preset distance.

The inner shift position tube 143 cooperates with the locking element 142 to be a component of the locking mechanism 140 that is locked to or separated from the locking element 142. The inner shift pipe 143 is fixedly connected to the outer pipe 130, when the outer casing 110 moves relative to the outer pipe 130, the outer casing 110 drives the release member 120 to move, so as to control the separation of the locking member 142 from the inner shift pipe 143, the locking member 142 and the fixing member 141 move along with the release member 120, and after the locking member 142 is adjusted to a preset position (that is, the total length of the support leg extension device 100 meets the requirement), the locking member 142 is locked with the inner shift pipe 143 again, so as to achieve the extension of the support leg extension device 100.

Specifically, referring to fig. 1 to 3, fig. 1 to 3 show the relative position relationship and the matching relationship between the parts when the supporting leg telescoping device 100 is completely in the retracted state. At this time, the outer tube 130 is fully extended into the outer shell 110, the release element 120 controls the locking element 142 to be matched and locked with the inner shift tube 143, the first spring 144 and the second spring 145 are in a mutually balanced state, the relative position between the release element 120 and the fixing element 141 is not changed, and the outer shell 110 and the outer tube 130 are locked with each other. Referring to fig. 4 to 6, when the support leg telescoping device 100 needs to be unfolded, the housing 110 is pulled downward, the unlocking element 120 moves downward along with the housing 110, the unlocking element 120 controls the locking element 142 to be separated from the inner shift pipe 143, the locking is released, meanwhile, the unlocking element 120 moves downward, the baffle 121 of the unlocking element 120 stretches the first spring 144 and compresses the second spring 145, the balance relationship between the first spring 144 and the second spring 145 is broken, and the fixing element 141 drives the locking element 142 to move downward along with the unlocking element 120. Referring to fig. 7 to 9, after the supporting leg telescoping device 100 extends to a predetermined length, the pulling of the housing 110 is stopped, and during the pulling of the housing 110, the first spring 144 is always in a stretched state and the second spring 145 is always in a compressed state under the action of the release member 120. Referring to fig. 10 to 12, after the pulling of the housing 110 is stopped, no external force is applied to the housing 110, at this time, the releasing member 120 is only under the action of the first spring 144 and the second spring 145, and the balance state between the first spring 144 and the second spring 145 is achieved by pushing the baffle 121 of the releasing member 120 again, that is, the first spring 144 and the second spring 145 simultaneously drive the baffle 121 to move upward, so that the releasing member 120 moves upward, at this time, the releasing member 120 pushes the locking member 142 to cooperate with the locking mechanism 140 and lock again, so as to fix the relative position between the housing 110 and the outer tube 130, so that the overall length of the support leg extension device 100 is kept unchanged. This is the process of changing the support leg stretching device 100 from the contracted state to the expanded state.

Referring to fig. 13 to 15, when the support leg telescoping device 100 needs to be changed to the retracted state again, the housing 110 is pushed upward to drive the unlocking member 120 to move upward, the locking member 142 is separated from the locking mechanism 140 again to unlock, and at the same time, the first spring 144 is compressed to stretch the second spring 145. After unlocking, the housing 110 is pushed continuously, the locking member 120 drives the fixing member 141 and the locking member 142 to move upwards, and the length of the support leg extension device 100 is gradually reduced. Referring to fig. 16 to 18, after the support leg telescoping device 100 is retracted to a predetermined length, the pushing of the housing 110 is stopped, and in the process of pushing the housing 110, the first spring 144 is always in a compressed state and the second spring 145 is always in an extended state under the action of the release member 120. Referring to fig. 1 to 3 again, after the pushing of the housing 110 is stopped, no external force is applied to the housing 110, the unlocking member 120 is only subjected to the acting force of the first spring 144 and the second spring 145 again, and the balance state between the first spring 144 and the second spring 145 is achieved by pushing the baffle 121 of the unlocking member 120 again, that is, the first spring 144 and the second spring 145 simultaneously drive the baffle 121 to move downwards, so that the unlocking member 120 moves downwards, and at this time, the unlocking member 120 pushes the locking member 142 to be matched with the locking mechanism 140 and locked again, so as to fix the relative position between the housing 110 and the outer tube 130, so that the overall length of the support leg extension device 100 is kept unchanged. This is the process of changing the support leg stretching device 100 from the stretching state to the contracting state.

Referring to fig. 2 and 8, the support leg telescoping device 100 may further include an inner tube 150 disposed between the release 120 and the outer tube 130, and the inner tube 150 is fixedly connected to the fixing member 141.

The inner tube 150 is used for fixing the fixing member 141 and moves up and down along with the fixing member 141, and meanwhile, the inner tube 150 is arranged between the release member 120 and the outer tube 130, so that a gap between the release member 120 and the outer tube 130 is filled, and the support leg telescopic device 100 is prevented from shaking in the telescopic process.

Referring to FIG. 19, optionally, a flange 1421 is disposed on the locking element 142, a track 122 is disposed on the unlocking element 120, and the flange 1421 slides in the track 122 to move toward or away from the inner shift tube 143.

The flange 1421 of the locking element 142 slides in the track 122 of the release element 120, thereby achieving the connection between the locking element 142 and the release element 120 and ensuring the relative movement between the locking element 142 and the release element 120. During the up and down movement of the release member 120, the flange 1421 slides up and down along the rail 122, and thus moves left and right, thereby locking and unlocking the locking element 142 and the locking mechanism 140.

Illustratively, the track 122 is wide at both ends and narrow in the middle, and the wider ends of the track 122 are both located on the same side of the narrower middle section. Referring to fig. 2, when the flange 1421 is located at the narrower middle section of the rail 122, the locking element 142 protrudes out of the unlocking element 120, and is engaged with and locked to the locking mechanism 140; referring to fig. 5 and 14, when the flanges 1421 are located at the wider ends of the rail 122, the locking element 142 retracts into the release member 120, separates from the locking mechanism 140, and unlocks.

Referring to fig. 1 and fig. 2, optionally, a first rack 1431 extending along the length direction of the inner shift pipe 143 is disposed on the outer wall of the inner shift pipe 143, a second rack 1422 engaged with the first rack 1431 is disposed on one side of the locking element 142 facing the inner shift pipe 143, and the second rack 1422 is inserted into the first rack 1431 to fix the locking element 142 on the inner shift pipe 143.

The locking member 142 and the inner gear 143 are engaged with each other by the racks to lock the outer tube 130 and the outer tube 110 in the longitudinal direction, and when the second rack 1422 is inserted into the first rack 1431, the outer tube 110 and the outer tube 130 are locked, the relative position is not changed, and the entire length of the support leg extension device 100 is maintained. When the second rack 1422 is separated from the first rack 1431, the outer casing 110 and the outer tube 130 are unlocked, and the outer casing 110 and the outer tube 130 can move relative to each other to adjust the overall length of the support leg retractor 100.

Optionally, the first racks 1431 include two, two first racks 1431 are oppositely disposed on two sides of the inner shift lever 143, the locking element 142 includes two, and two second racks 1422 on the two locking elements 142 are respectively engaged with the two first racks 1431.

Two locking parts 142 are respectively including the relative both sides of gear pipe 143 simultaneously with interior gear pipe 143 locking or separation, make the inside mechanism of outer tube 130 more symmetrical, the atress of interior gear pipe 143 is more balanced, at the tensile and shrink in-process of supporting leg telescoping device 100, the condition that locking is not firm or rock can not appear.

Referring to fig. 7 and 8, optionally, an inner shift pipe fixing member 160 is disposed at an end of the inner shift pipe 143, a slide 1413 for sliding the inner shift pipe fixing member 160 is disposed on the fixing member 141, and one end of the slide 1413 is located at a first end of the fixing member 141 close to the groove 1412 and the other end is located between the first end and the through hole 1411.

The inner gear tube fixing member 160 is fixedly connected with the inner gear tube 143 and can slide in a slide 1413 of the fixing member 141, the slide 1413 is disposed below the locking member 142, and one end of the slide 1413 facing the locking member 142 is closed, so that the fixing member 141 and the inner gear tube 143 can be prevented from being separated from each other in the process that the fixing member 141 moves downward relative to the inner gear tube 143, and the outer shell 110 and the outer tube 130 are prevented from being stretched excessively.

Referring to fig. 1 and 3, the support leg stretching device 100 may further include a foot pad 170 disposed at an end of the housing 110 and the release member 120, and the housing 110 and the release member 120 may be fixedly connected by the foot pad 170.

The housing 110 and the release member 120 are fixed to the foot pad 170, and are fixedly connected to each other through the foot pad 170. Meanwhile, the foot pad 170 seals the bottom of the case 110 to prevent foreign substances from entering the inside of the support leg expansion device 100. When the telescopic device is used, the foot pad 170 is in contact with a supporting surface, so that the contact area is increased, and the supporting leg telescopic device 100 is more stable in supporting.

In this embodiment, the connection manner between the foot pad 170 and the housing 110 and the release member 120 is not limited, as long as the foot pad 170 can be used to fixedly connect the housing 110 and the release member 120. For example, the foot pad 170 is welded to the housing 110 and the release element 120, or a protrusion is provided on the foot pad 170, a receiving groove corresponding to the protrusion is provided on the housing 110 and the release element 120, and the foot pad 170 is connected to the housing 110 and the release element 120 by the engagement between the protrusion and the receiving groove.

Optionally, an inner tube fixing member 180 is disposed at an end of the inner tube 150, a third spring is disposed between the inner tube fixing member 180 and the foot pad 170, and a stretching direction of the third spring is parallel to a length direction of the inner tube 150.

The inner pipe fixture 180 is used to fix the inner pipe 150 to the foot pad 170 to prevent the inner pipe 150 from being arbitrarily moved inside the outer case 110. Meanwhile, a third spring is provided between the inner pipe fixing member 180 and the foot pad 170, and when the outer case 110 is pulled downward to contact the foot pad 170 with the supporting surface, the third spring may play a role of buffering to buffer the impact applied to the supporting leg stretching device 100.

The embodiment further provides a child safety seat, which comprises the support leg telescopic device 100. When the child safety seat is used, the supporting leg telescopic device 100 on the child safety seat can be abutted to the bottom surface of the vehicle through adjusting the length, the installation is convenient, the firmness is good, and the safety is high.

In the foregoing explanation of the support leg retractor 100, the operation manner, the operation principle, and the like of the support leg retractor 100 when it is installed in the child safety seat have been described in detail, and will not be described again.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. The utility model provides a supporting leg telescoping device, its characterized in that includes shell, release piece, outer tube, locking piece and locking mechanism, the shell cover is established the outer tube outer wall, release piece the locking piece with locking mechanism sets up inside the outer tube, release piece with shell fixed connection, release piece follows the length direction motion control of outer tube the locking piece with locking mechanism locks or separates in order to adjust the shell with relative position between the outer tube.

2. The supporting leg telescoping device of claim 1, wherein locking mechanism includes mounting, interior gear pipe, first spring and second spring, interior gear pipe with outer tube fixed connection, the mounting sets up release with between the interior gear pipe, be equipped with through-hole and recess on the lateral wall of mounting, the closure slides in the through-hole and under the control of release with interior gear pipe locking or separation, first spring with the second spring is fixed respectively on two lateral walls that the recess is relative, be equipped with the baffle on the release, the baffle be located between first spring with the second spring and with first spring with second spring fixed connection.

3. The support leg telescoping device of claim 2, further comprising an inner tube disposed between the release and the outer tube, the inner tube fixedly connected to the securing member.

4. The support leg telescoping device of claim 2, wherein the locking element is provided with a flange and the release element is provided with a track, the flange sliding within the track to move toward or away from the inner shift tube.

5. The supporting leg telescoping device of claim 2, wherein the outer wall of the inner gear tube is provided with a first rack extending along the length direction of the inner gear tube, one side of the locking piece facing the inner gear tube is provided with a second rack matched with the first rack, and the second rack is inserted into the first rack to fix the locking piece on the inner gear tube.

6. The support leg telescoping device of claim 5, wherein the first rack comprises two, two first racks are oppositely disposed on two sides of the inner gear tube, the locking piece comprises two, and two second racks on the two locking pieces are respectively matched with the two first racks.

7. The supporting leg telescoping device of claim 2, wherein the tip of interior gear pipe is equipped with interior gear pipe mounting, be equipped with on the mounting and supply the gliding slide of interior gear pipe mounting, the one end of slide is located be close to on the mounting the first end of recess, the other end is located first end with the through-hole between.

8. The support leg retractor device of claim 3 further comprising foot pads disposed at ends of the housing and the lock release member, the housing and the lock release member being fixedly connected by the foot pads.

9. The support leg telescoping device of claim 8, wherein an inner tube fixing part is arranged at the end part of the inner tube, a third spring is arranged between the inner tube fixing part and the foot pad, and the telescoping direction of the third spring is parallel to the length direction of the inner tube.

10. A child safety seat comprising a support leg retractor according to any of claims 1 to 9.

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