CN212073786U

CN212073786U - Locking mechanism of automobile safety seat

Info

Publication number: CN212073786U
Application number: CN202020358626.0U
Authority: CN
Inventors: 林江娟; 夏环乐
Original assignee: Ningbo Welldon Baby Safety Technology Co ltd
Current assignee: Ningbo Welldon Baby Safety Technology Co ltd
Priority date: 2020-03-19
Filing date: 2020-03-19
Publication date: 2020-12-04
Anticipated expiration: 2030-03-19

Abstract

The utility model discloses a locking mechanism of car safety seat, it includes mobile jib and branch, the upper end of branch is articulated with the mobile jib, its characterized in that: the seat is characterized in that a driven piece is arranged on the main rod and is in running fit with the main rod, a spring bolt is arranged on the driven piece and is matched with a slot in a seat base, the spring bolt moves circumferentially and reciprocally along with the driven piece, and the driven piece is connected with the supporting rod through a linkage piece, so that the rotation of the driven piece is associated with the rotation of the supporting rod. The utility model provides a locking mechanism of car safety seat, the motion and the branch formation linkage of spring bolt among its locking mechanism to make locking mechanism's control simpler.

Description

Locking mechanism of automobile safety seat

Technical Field

The utility model relates to a technical field of safety seat, specifically a locking mechanism of car safety seat.

Background

The child car safety seat is designed for children with different weights (or ages) and is installed in a car, so that the riding safety of the children can be effectively improved. The definitions of the european mandatory enforcement standard are: a child safety system comprising a harness assembly or flexible member with an interface, an adjustment mechanism, an accessory, etc., capable of being secured to a motor vehicle. 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.

In the prior safety seat with partial models, a supporting rod for supporting is additionally arranged in consideration of improving safety, but an integrated fixing structure is mostly adopted between the prior supporting rod and a base of the safety seat. The applicant has already proposed a patent application in order to make the pole support be connected to the main pole on the base in a sliding fit manner based on the fixed pole support structure, but the applicant needs to satisfy both the requirement of sliding fit and the locking between the main pole and the base, and needs to seek a new technical breakthrough for the locking mechanism in order to make the locking mechanism simpler and more reliable.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem in the correlation technique to a certain extent at least: the locking mechanism of the automobile safety seat is provided, and the movement of a lock tongue in the locking mechanism is linked with a support rod, so that the control of the locking mechanism is simpler.

Therefore, an object of the utility model is to provide a locking mechanism of car safety seat, it includes mobile jib and branch, the upper end of branch is articulated with the mobile jib, its characterized in that: the seat is characterized in that a driven piece is arranged on the main rod and is in running fit with the main rod, a spring bolt is arranged on the driven piece and is matched with a slot in a seat base, the spring bolt moves circumferentially and reciprocally along with the driven piece, and the driven piece is connected with the supporting rod through a linkage piece, so that the rotation of the driven piece is associated with the rotation of the supporting rod. The locking mechanism adopts the expansion of the lock tongue to realize fixed connection or reset disconnection, so that the locking mechanism has simple structure and is firm and reliable; in addition, the driven piece and the lock tongue on the driven piece can be driven to rotate through the swinging of the supporting rod, and the lock tongue is switched between a locking position and an unlocking position finally, so that an operator can control the motion of the lock tongue more conveniently.

Preferably, an active part is fixed on the support rod, and the linkage part is connected with the active part.

Preferably, the linkage part is of a rod-shaped structure, and two ends of the linkage part are respectively connected with the driven part and the driving part.

Preferably, the driving part is provided with a sliding groove, the sliding groove comprises a first section of sliding groove and a second section of sliding groove, the vertical distance between the first section of sliding groove and the rotating axis of the supporting rod is smaller than the vertical distance between the second section of sliding groove and the rotating axis of the supporting rod, and the end part of the linkage part is inserted into the sliding groove and slides between the first section of sliding groove and the second section of sliding groove along with the swinging of the supporting rod. Through the design of the sliding groove, in the process that the driving part swings along with the main rod, the moving amplitude of the end part, connected with the driving part, of the linkage part in the vertical direction is small, even the linkage part stands still relatively, and the moving amplitude in the horizontal direction is large, so that the horizontal moving quantity of the linkage part is controllable when the driving part rotates by a unit angle, and the control precision can be improved.

Preferably, the bolt is provided with a guide inclined plane towards one side of the strut, the main rod is provided with a return spring for driving the driven part to drive the bolt to rotate towards the outer direction of the main rod, the second section of sliding groove radially extends to form a reserved space for the linkage part to radially move, and the smooth inner wall of the second section of sliding groove and the smooth inner wall of the first section of sliding groove are in smooth transition. If only insert the spout of initiative piece with the tip of linkage piece and realize the connection of the two, if make branch swing then can make the spring bolt stretch out and take place to touch with the slot on the base other part when the removal of mobile jib leads to the spring bolt and the slot on the base not yet can be fine counterpoint, cause the damage from this. And through the design of headspace and direction inclined plane, not only can be fine avoid the linkage piece when the reaction on the active piece with the spout inner wall collision cause the damage, the design on direction inclined plane can make the spring bolt not stretch out with under the corresponding condition of slot in addition, the in-process spring bolt that the mobile jib pulling can receive the spacing of base and retract automatically, and the spring bolt breaks away from the restraint automatic insertion slot of base when removing to slot position.

Preferably, part or all of the linkage part is composed of a chain or a rope, one end of the linkage part is connected with the driven part, the other end of the linkage part is connected with the driving part, a return spring is arranged between the driven part and the main rod, and the return spring drives the driven part and the lock tongue on the driven part to rotate towards the position of the slot.

Preferably, the support rod is a telescopic rod with adjustable length. Not only can increase branch through the design of telescopic link to give the bigger selection space of strong applicability of strong, the length of reduction branch that telescopic branch can be very big moreover gives accomodating of branch and facilitates.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

The technical scheme has the following advantages or beneficial effects: the reciprocating motion of steerable spring bolt promptly through the swing of branch to realize locking mechanism's locking and unblock through the spring bolt, consequently not only make locking mechanism simple structure, the motion of spring bolt forms the linkage with the swing of branch moreover, thereby makes operating personnel's simple operation.

Drawings

Fig. 1 is a schematic structural diagram of the locking mechanism of the present invention.

Figure 2 is an exploded view of the locking mechanism of figure 1.

Fig. 3 is a partially enlarged view of the region "a" in fig. 2.

Fig. 4 is a schematic half-section view of the present invention.

Fig. 5 is a partially enlarged view of the region "B" in fig. 4.

Fig. 6-1 to 6-4 are schematic structural views of different working states between the driving member and the linkage member, respectively.

Fig. 7 is an assembly diagram of the present invention installed on a seat base.

The seat comprises a main rod 1, a main rod 2, a support rod 3, a driven piece 4, a lock tongue 4.1, a guide inclined plane 5, a linkage piece 6, a driving piece 7, a sliding groove 7.1, a first section of sliding groove 7.2, a second section of sliding groove 8, a seat base 8.1 and a guide rail;

L₁the vertical distance between the first section of the sliding chute and the rotating axis of the support rod is defined;

L₂the vertical distance between the second section of the sliding groove and the rotating axis of the support rod is indicated.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

A locking mechanism of a car safety seat according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

The first embodiment is as follows:

in order to enable the automobile safety seat to be suitable for two conditions with or without external accessories and enable the structure of the safety seat to have firm and reliable performance requirements while the automobile safety seat is provided with the external accessories, the utility model provides an automobile safety seat, which comprises a seat base 8, a main rod 1 for installing accessories is arranged in front of the seat base 8, the rear end of the main rod 1 is movably connected with the seat base 8, a locking mechanism of the embodiment is arranged between the main rod 1 and the seat base 8, the locking mechanism comprises a driven part 3 and a driving part 6, a spring bolt 4 is arranged on the driven part 3, the spring bolt 4 responds to the movement of the driven part 3 to limit the main rod 1 on the seat base 8 or reset to release the limit between the seat base 8 and the main rod 1, a linkage part 5 is arranged between the driven part 3 and the driving part 6, the driving member 6 drives the driven member 3 through the link member 5. The locking mechanism can enable the main rod 1 to be well positioned after extending out of the seat base 8, so that the main rod 1 can be used as an installation foundation of accessories, the installation of the accessories on the seat base 8 is completed, meanwhile, the installation position of the accessories can be far away from the base, and additional effects can be brought.

When the accessory is a fixed rod-shaped structure such as a support rod, the accessory can support the main rod 1 so as to provide extra supporting force for the seat base 8, and the main rod 1 can be telescopic, so that the position of a supporting point is far away from the seat base 8, and the supporting effect is better and more stable; meanwhile, the telescopic main rod 1 can enable the main rod 1 to be reset and contracted, even be completely hidden in the seat base 8, so that the main rod 1 can be completely hidden in the safety seat, and the safety seat can be used as a safety seat without accessories. Preferably, the seat base 8 may be additionally provided with a groove or a cavity for accommodating accessories, so that the main rod 1 can be hidden and the accessories can be folded, thereby achieving the purposes of accommodating and hiding.

When the accessory is a rope structure such as a binding belt, the accessory can connect the main rod 1 with the vehicle so as to provide extra tension for the seat base 8, and the main rod 1 can be telescopic, so that the position of a supporting point is far away from the seat base 8, and the supporting effect is better and stable; meanwhile, the telescopic main rod 1 can enable the main rod 1 to be reset and contracted, even be completely hidden in the seat base 8, so that the main rod 1 can be completely hidden in the safety seat, and the safety seat can be used as a safety seat without accessories. The seat base 8 can be additionally provided with a groove or a cavity for storing accessories, so that the main rod 1 can be hidden and the accessories can be wound or folded, and the purposes of storage and hiding are achieved.

Example two:

the basic structure is the same as the first embodiment, except that: a guide rail 8.1 is arranged in the seat base 8, and the main rod 1 is in sliding fit with the seat base 8 through the guide rail 8.1.

Preferably, the base is provided with a jack into which the rear end of the main rod 1 is inserted, the guide rail is arranged in the jack, and the rear end of the main rod 1 is inserted into the jack and is in sliding fit with the guide rail 7 in the jack.

Preferably, the seat base 8 includes a frame and a housing, and the rail 7 is connected to the frame, thereby improving the strength of the rail 7.

The function of the above-mentioned guide rail 8.1 is to enable the main bar 1 to move on the seat base 8 in only one dimension, i.e. in the same linear direction, so this guide rail 8.1 in this embodiment should not be limited to be understood as a track mechanism in the prior art, but should be understood as a general term for a mechanism that can restrict the movement of the main bar 1, thereby enabling the main bar 1 to move in only one dimension.

Example three:

the basic structure of this embodiment is the same as that of the embodiment, and the difference is that: the driven part 3 is arranged on the main rod 1, the seat base 8 is provided with a slot matched with the bolt 4 on the driven part 3, and the bolt 4 responds to the motion of the driven part 3 and is inserted into the slot or separated from the slot. The locking limit and the reset release between the main rod 1 and the seat base 8 are realized by inserting and separating the slot and the bolt 4, so that the structure is simple, and the structure is firm and reliable.

Specifically, be equipped with the hinge hole on the follower 3, also be equipped with the assorted hinge hole on the mobile jib 1, the hinge hole of this follower 3 aligns with the hinge hole on the mobile jib 1 to link to each other through a pivot, make follower 3 and mobile jib 1 normal running fit from this, spring bolt 4 is fixed in on the follower 3 just spring bolt 4 sets up with the axis interval at pivot place, consequently when follower 3 rotates around the axis of self pivot spring bolt 4 is along circumferential direction.

Preferably, the latch tongue 4 is a separate component, and the separate latch tongue 4 and the follower 3 are fixedly connected, for example, by welding, bonding, riveting, clamping, or other conventional connection methods. Or detachable connection, for example threaded connection, between solitary spring bolt 4 and follower 3, detachable spring bolt 4 design is favorable to the regulation of spring bolt 4 position, can be better in the assembly process through the position control of spring bolt 4 with the slot on seat base 8 cooperate, detachable spring bolt 4 also is favorable to the change when spring bolt 4 damages simultaneously.

Example four:

in this embodiment, as shown in fig. 2 and 3, the linkage member 5 is a rod-shaped structure, two ends of the linkage member 5 are bent to form bent portions, the driven member 3 and the driving member 6 are both provided with connecting holes, and the bent portions at two ends of the linkage member 5 are respectively inserted into the connecting holes of the driven member 3 and the driving member 6, so that the linkage member 5 is connected with the driven member 3 and the driving member 6. The driven member 3 and the driving member 6 are linked by the link member 5.

Example five:

the linkage member 5 in this embodiment is composed of a whole chain or rope, two ends of the linkage member 5 are respectively fixed to the driven member 3 and the driving member 6, a return spring is arranged between the driven member 3 and the main rod 1, and the return spring drives the driven member 3 and the lock tongue 4 on the driven member 3 to rotate towards the position of the slot.

Preferably, the linkage member 5 in this embodiment is composed of a partial chain or rope and two connectors, the two connectors are respectively fixed to the driven member 3 and the driving member 6, the two connectors are connected through the chain or rope, a return spring is arranged between the driven member 3 and the main rod 1, and the return spring drives the driven member 3 and the lock tongue 4 on the driven member 3 to rotate towards the position of the slot.

The reset spring in this embodiment may be a torsion spring installed on the rotating shaft of the driven member 3 itself or a tension spring connected between the driven member 3 and the main rod 1, and two ends of the tension spring are respectively connected with the driven member 3 and the main rod 1, so that the driven member 3 is pulled to rotate towards the direction of driving the bolt 4 and the inserting slot to be inserted under the elastic action of the tension spring.

Example six:

in this embodiment, the main rod 1 is provided with an external accessory, the accessory is movably connected with a position of the main rod 1 departing from the seat base 8, and the movement of the active component 6 is associated with the movement of the accessory. The movement of the driving part 6 is controlled by the movement of the accessories, and then the insertion or the separation of the bolt 4 on the driven part 3 and the slot on the seat base 8 is controlled by the linkage between the driving part 6 and the driven part 3. Thereby enabling the movement of the accessory to control the positive locking or unlocking between the main bar 1 and the seat base 8.

Preferably, when the accessory is a strut 2, the upper end of the strut 2 is hinged with the front end of the main rod 1, the movement of the active part 6 is associated with the swinging of the strut 2, and the active part 6 is moved by the swinging of the strut 2.

Preferably, when the accessory is a telescopic pull rod, the upper end of the pull rod is a fixed end, the fixed end is fixedly connected with the front end of the main rod 1, the lower end of the pull rod is a free end, the free end can be stretched along the axis direction of the pull rod, a pull rope is arranged in the pull rod, the lower end of the pull rope is fixedly connected with the free end, only a cavity in the pull rod is connected with the active part 6 at the upper end of the pull rope, and the active part 6 moves relative to the main rod 1 through the pulling of the pull rope, for example, the active part 6 slides relative to the main rod 1, or the active part 6 rotates relative.

Example seven:

the basic structure is the same as that of the sixth embodiment, and the difference is that: the annex is branch 2, and the upper end of branch 2 is articulated with the front end of mobile jib 1, drive 6 is fixed in on branch 2, so that drive 6 and branch 2 linkage.

Example eight:

the basic structure is the same as that of the seventh embodiment, and the difference is that: in order to enable the driving part 6 to swing along with the main rod 8, the moving amplitude of the end part of the linkage part 5 connected with the driving part 6 in the vertical direction is small, even the end part is relatively static, and the moving amplitude in the horizontal direction is large, so that the horizontal moving amount of the linkage part 4 is controllable when the driving part 6 rotates by a unit angle, therefore, for the purpose of improving the control precision, the driving part 6 is provided with a sliding groove 7, the sliding groove 7 comprises a first section sliding groove 7.1 and a second section sliding groove 7.2, and the vertical distance L between the first section sliding groove 7.1 and the rotating axis of the support rod 2₁Is less than the vertical distance L between the second section of the sliding chute 7.2 and the rotating axis of the supporting rod 2₂The end of the link 5 is inserted into the sliding slot 7 and slides between the first section of sliding slot 7.1 and the second section of sliding slot 7.2 along with the swing of the strut 2. In this embodiment, the linking member 5 is under the action of the pre-tightening tension of the return spring on the driven member 3, so that the linking member 5 overcomes the sliding friction force between the linking member 5 and the sliding groove 7, and the connecting points at the two ends of the linking member 5 and the central point of the rotation axis of the driving member 6 are on the same straight line, so that the position of the contact point between the linking member 5 and the sliding groove is continuously changed along with the rotation of the driving member 6, and the contact point between the linking member 5 and the sliding groove 7 slides from the position of the second section of sliding groove 7.2 to the position of the first section of slidingWhen the chute 7.1 is positioned, the vertical distance L between the first section chute 7.1 and the rotating axis of the support rod 2₁Is less than the vertical distance L between the second section of the sliding chute 7.2 and the rotating axis of the supporting rod 2₂Therefore, the linkage rod 5 is drawn close to the position of the driving part 6 along the length direction of the linkage rod; otherwise, the linkage rod 5 moves towards the position of the driven part 3 along the length direction thereof under the action of the return spring. Finally, linkage is formed between the swinging of the driving part 6 and the rotation of the driven part.

Example nine:

although the linkage between the driving member 6 and the driven member 3 can be achieved well when the structure of the eighth embodiment is adopted to achieve the linkage between the driving member 6 and the driven member 3, if the support rod 2 swings to make the latch 4 extend out of the slot on the seat base 8 to touch when the latch 4 and the slot on the seat base 8 are not aligned well, the damage is caused, and based on this embodiment, the following improvements are made on the basis of the ninth embodiment: as shown in fig. 3, a guide inclined plane 4.1 is formed by internally cutting one side of the lock tongue 4 facing the support rod 2, when the lock tongue 4 is inserted into the slot, the guide inclined plane 4.1 corresponds to the notch of the slot in the horizontal direction, a return spring is arranged on the main rod 1, the return spring drives the driven member 3 to drive the lock tongue 4 to rotate in the direction outside the main rod 1, the lock tongue 4 rotates outwards the main rod 1 under the driving force of the return spring and is inserted into the slot on the corresponding seat base 1, the second section of sliding slot 7.2 radially extends to form a reserved space for the radial movement of the linkage member 5, and the inner wall of the second section of sliding slot 7.2 is in smooth transition with the inner wall of the first section of sliding slot 7.1. When the guiding inclined plane 4.1 is retracted under the action of the seat base 8, the driven member 3 drives the linkage member 5 to move towards the position of the driving member 6, and the end part of the linkage member 5 connected with the driving member 6 is located in the second section of sliding groove 7.2, so that the linkage member 5 and the inner side wall of the second section of sliding groove 7.2 close to the rotation axis are extruded and collided, and in the embodiment, a reserved space is arranged in the second section of sliding groove 7.2, so that the linkage member 5 can move in the second section of sliding groove 7.2 along the radial direction of the driving member 6 without being limited by the inner wall of the second section of sliding groove 7.2.

Preferably, the second section of the sliding chute 7.2 on the driving member 6 extends to the position of the axis of the rotation of the supporting rod 2 along the radial direction, the vertical distance between the inner side wall of the second section of the sliding chute 7.2 close to the axis of the rotation and the axis of the rotation is less than or equal to the vertical distance between the inner side wall of the first section of the sliding chute 7.1 close to the axis of the rotation and the axis of the rotation, and in another aspect, the width dimension of the second section of the sliding chute 7.2 along the radial direction of the sliding chute 7 is greater than the width dimension of the first section of the.

Example ten:

the structure is basically the same as that of the seventh embodiment, except that: the annex is branch 2, just branch 2 with for self length adjustable's telescopic link, the upper end of branch 2 is as the stiff end, and this stiff end is articulated with the front end of mobile jib 1, on the initiative piece 6 is fixed in the fixed end of branch 2, the lower extreme of branch 2 is the end that freely stretches out and draws back, and the axial stretch of branch 2 can be followed to this end that freely stretches out and draws back.

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

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

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

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

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Various alterations and modifications will no doubt become apparent to those skilled in the art after having read the above description. It is therefore intended that the appended claims be interpreted as covering all alterations and modifications as fall within the true spirit and scope of the invention. Any and all equivalent ranges and contents within the scope of the claims should be considered to be within the intent and scope of the present invention.

Claims

1. The utility model provides a locking mechanism of car safety seat, it includes mobile jib (1) and branch (2), the upper end and mobile jib (1) of branch (2) are articulated, its characterized in that: be equipped with follower (3) on mobile jib (1), follower (3) and mobile jib (1) normal running fit, just be equipped with spring bolt (4) on follower (3) for cooperate with the slot on the seat base, the rotation circumference reciprocating motion of spring bolt (4) follow-up piece (3), link to each other through linkage (5) between follower (3) and branch (2), so that the rotation of follower (3) is correlated with the rotation of branch (2).

2. The latch mechanism of a car safety seat according to claim 1, wherein: an active part (6) is fixed on the supporting rod (2), and the linkage part (5) is connected with the active part (6).

3. The latch mechanism of a car safety seat according to claim 2, wherein: the linkage piece (5) is of a rod-shaped structure, and two ends of the linkage piece (5) are respectively connected with the driven piece (3) and the driving piece (6).

4. A latch mechanism for a car safety seat according to claim 3, wherein: the driving part (6) is provided with a sliding chute (7), the sliding chute (7) comprises a first section of sliding chute (7.1) and a second section of sliding chute (7.2),the vertical distance L between the first section of sliding chute (7.1) and the rotating axis of the supporting rod (2)₁Is less than the vertical distance L between the second section of sliding chute (7.2) and the rotating axis of the supporting rod (2)₂The end part of the linkage piece (5) is inserted into the sliding groove (7) and slides between the first section of sliding groove (7.1) and the second section of sliding groove (7.2) along with the swinging of the support rod (2).

5. The latch mechanism of a car safety seat according to claim 4, wherein: go to branch (2) one side on spring bolt (4) and be equipped with direction inclined plane (4.1), be equipped with reset spring on mobile jib (1) for order about follower (3) to drive spring bolt (4) and rotate towards the outer direction of mobile jib (1), second section spout (7.2) radially extend and form the headspace that supplies linkage (5) radial movement, the inslot wall of the smooth (7.2) of second section and the inslot wall smooth transition of first section spout (7.1).

6. The latch mechanism of a car safety seat according to claim 2, wherein: the part or the whole of linkage piece (5) comprises chain or rope, and the both ends of linkage piece (5) link to each other with follower (3) and driving piece (6) respectively, be equipped with reset spring between follower (3) and mobile jib (1), reset spring forces to follower (3) and drives spring bolt (4) and rotate towards the outer direction of mobile jib (1).

7. The latch mechanism of a car safety seat according to any one of claims 1 to 5, wherein: the support rod (2) is a telescopic rod with adjustable length.