Child safety seats

Abstract

The present invention discloses a child safety seat, comprising a seat body, a base located at the bottom of the seat body, and a pressure rod for pressing the safety belt against the base, the pressure rod having a closed state in which it is retracted relative to the base and an open state in which it is opened relative to the base, the child safety seat also comprising a pressure rod locking mechanism for locking the pressure rod in the closed state, and an unlocking mechanism for unlocking the pressure rod locking mechanism, the unlocking mechanism at least comprising an unlocking member rotatably arranged on the base via a first axis, a conversion mechanism for driving the unlocking member to rotate when the pressure rod is pressed so that the pressure rod locking mechanism is converted between a locked state and an unlocked state. In the child safety seat of the present invention, pressing the pressure rod once can achieve locking of the pressure rod, and pressing the pressure rod again can achieve unlocking of the pressure rod, the operation is simple, and the use is convenient.

Description

Technical Field

[0001] The invention relates to a child safety seat. Background Art

[0002] In the prior art, a pressure rod on a child safety seat is used to press the car seat belt into the safety seat so that the safety seat is more stably fixed on the car seat. Most of the existing pressure rod locking and unlocking structures have the problems of complex structure and inconvenient operation. Summary of the invention

[0003] The object of the present invention is to provide a child safety seat which has a simple pressure rod structure and is easy to lock and unlock.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A child safety seat comprises a seat body, a base located at the bottom of the seat body, and a pressure rod for pressing a safety belt against the base, wherein the pressure rod has a closed state in which it is retracted relative to the base and an open state in which it is open relative to the base, the child safety seat also comprises a pressure rod locking mechanism for locking the pressure rod in the closed state, and an unlocking mechanism for unlocking the pressure rod locking mechanism, the unlocking mechanism at least comprising an unlocking member rotatably arranged on the base via a first axis, and a conversion mechanism is arranged between the pressure rod and the unlocking member for driving the unlocking member to rotate when the pressure rod is pressed so that the pressure rod locking mechanism is converted between a locked state and an unlocked state.

[0006] Preferably, the pressure rod locking mechanism includes a locking piece which can be moved in a straight line on the base, and a matching portion which is provided on the pressure rod and matches with the locking piece. When the pressure rod locking mechanism is in a locked state, the locking piece is matched and connected with the matching portion. When the pressure rod locking mechanism is in an unlocked state, the locking piece is disengaged from the matching portion, and when the unlocking piece rotates, the locking piece is driven to move in a straight line so that the pressure rod locking mechanism is switched between the locked state and the unlocked state.

[0007] Preferably, the locking member is a locking pin, the mating portion is a locking groove into which the locking pin can be matingly inserted, and the pressure rod locking mechanism also includes a first elastic member for providing the force required for the locking pin to move away from the locking groove. When the pressure rod locking mechanism is in a locked state, the locking pin is inserted in the locking groove; when the pressure rod locking mechanism is in an unlocked state, the locking pin disengages from the locking groove, and when the unlocking member rotates, the locking pin is driven to move axially to cause the pressure rod locking mechanism to switch between the locked state and the unlocked state.

[0008] Preferably, the unlocking member at least includes a cam, and a protrusion and a groove are provided on the periphery of the cam. When the pressure rod locking mechanism is in a locked state, the protrusion abuts against the locking member; when the pressure rod locking mechanism is in an unlocked state, at least part of the locking member is located in the groove.

[0009] Preferably, the unlocking member also includes a ratchet wheel coaxially fixedly connected to the cam, and the circumference of the ratchet wheel has a plurality of evenly arranged gear teeth; the pressure rod has a rotating end and a locking end respectively arranged at two different ends of its own length direction, and the rotating end is rotatably connected to the base through a second axis, and the conversion mechanism includes a pressure block rotatably provided at the locking end through a third axis, and when the pressure rod locking mechanism is converted between the locked state and the unlocked state, the pressure block presses downward against one of the gear teeth.

[0010] Preferably, the upper surface of the pressing block is an arcuate surface, and the lower surface of the pressing block is a plane. When the pressure rod locking mechanism is in the locking state, the upper surface of the pressing block abuts against one of the gear teeth and restricts the rotation of the unlocking member.

[0011] Preferably, the protrusions and the grooves are alternately arranged at even intervals on the outer periphery of the cam, and the number of the gear teeth is equal to the sum of the number of the protrusions and the grooves.

[0012] Preferably, the unlocking member includes two cams coaxially fixedly connected, and a ratchet wheel coaxially fixed between the two cams, and the pressure rod locking mechanism has two groups arranged corresponding to the two cams.

[0013] Preferably, the axis lines of the first axis, the second axis and the third axis are parallel to each other and extend in the left-right direction.

[0014] Preferably, a top block capable of relative sliding in the up and down directions is provided on the base, and a second elastic member for providing the force required for the top block to move upward is provided between the top block and the base. When the pressure rod is in the closed state, the top block abuts against the bottom of the pressure rod.

[0015] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: the child safety seat of the present invention, through the unlocking member and the conversion mechanism arranged between the pressure rod and the base, can lock the pressure rod by pressing the pressure rod once, and can unlock the pressure rod by pressing the pressure rod again, which is simple to operate and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attached Figure 1 It is a three-dimensional structural schematic diagram of a specific embodiment of a child safety seat of the present invention;

[0017] Attached Figure 2 is a top view of the child safety seat when the pressure rod is in the open state in this embodiment;

[0018] Attached Figure 3 for Figure 2 Middle AA section view;

[0019] Attached Figure 4 for Figure 3 Enlarged view of point C in the middle;

[0020] Attached Figure 5 for Figure 2 Middle BB cross section;

[0021] Attached Figure 6 for Figure 5 Enlarged view of point D in the middle;

[0022] Attached Figure 7 is a top view of the child safety seat when the pressure rod is in a closed state in this embodiment;

[0023] Attached Figure 8 for Figure 7 Middle EE cross section;

[0024] Attached Fig. 9 for Figure 8 Enlarged view of point G in the middle;

[0025] Attached Fig.10 for Figure 7 Middle FF cross-section;

[0026] Attached Fig.11 for Fig.10 Enlarged view of H in the middle;

[0027] Attached Fig.12 Schematic diagram of the pressure rod, the unlocking mechanism and the locking mechanism when the pressure rod locking mechanism is in the unlocked state in this embodiment;

[0028] Attached Fig.13 for Fig.12 Schematic diagram of the local structure;

[0029] Attached Fig.14 Schematic diagram of the pressure rod, unlocking mechanism and locking mechanism during the locking process of the pressure rod locking mechanism in this embodiment;

[0030] Attached Fig.15 for Fig.14 Schematic diagram of the local structure;

[0031] Attached Fig.16 It is a schematic diagram of the pressure rod, the unlocking mechanism and the locking mechanism when the pressure rod locking mechanism is in the locked state in this embodiment;

[0032] Attached Fig.17 for Fig.16 Schematic diagram of the local structure;

[0033] Attached Fig.18 Schematic diagram of the pressure rod, the unlocking mechanism and the locking mechanism during the unlocking process of the pressure rod locking mechanism in this embodiment;

[0034] Attached Fig.19 for Fig.18 Schematic diagram of the local structure;

[0035] Among them: 1. seat body; 2. base; 3. pressure rod; 31. rotating end; 32. locking end; 4. safety belt; 51. locking pin; 52. locking groove; 53. first elastic member; 54. locking pin slide groove; 6. unlocking member; 61. cam; 611. protrusion; 612. groove; 62. ratchet; 621. gear teeth; 71. pressure block; 711. arc surface; 712. plane; 81. top block; 82. second elastic member; 83. top block slide groove; 9. fixing member. DETAILED DESCRIPTION

[0036] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0037] The directional words such as up and down, left and right, front and back involved in the present invention are defined according to the up and down, left and right, front and back directions observed by the child when the child sits in the child safety seat.

[0038] See also Figure 1 and Figure 3 The child safety seat shown in the figure comprises a seat body 1, a base 2 located at the bottom of the seat body 1, a pressure rod 3 for pressing a car safety belt 4 onto the base 2, and a fixing member 9 for connecting with the car seat. Figure 3 and Figure 8 As shown, the pressure rod 3 has a rotating end 31 and a locking end 32 respectively arranged at two different ends in the length direction of the pressure rod 3. The rotating end 31 is rotatably connected to the base 2 through the second axis b, and the axis of the second axis b extends in the left and right horizontal directions. The pressure rod 3 has a closed state in which it is retracted relative to the base 2, and an open state in which it is opened relative to the base 2. The child safety seat also includes a pressure rod locking mechanism for locking the pressure rod 3 in the closed state, and an unlocking mechanism for unlocking the pressure rod locking mechanism.

[0039] like Figure 4 and Fig. 9As shown, the pressure rod locking mechanism includes a locking member that can be arranged on the base 2 in a linear motion, and a matching portion that is arranged on the pressure rod 3 and matches with the locking member. In this embodiment, specifically, the locking member is a locking pin 51 that is slidably arranged in the locking pin slide 54 in the front-back direction, and the matching portion is a locking slot 52 that is arranged on the locking end 32 and can be inserted into the locking pin 51 in a matching manner. The locking pin slide 54 is fixed on the base 2. The pressure rod locking mechanism also includes a first elastic member 53 that is arranged in the locking pin slide 54 and is used to provide the force required for the locking pin 51 to move away from the locking slot 52. When the pressure rod locking mechanism is in a locked state, the locking pin 51 is inserted in the locking slot 52; when the pressure rod locking mechanism is in an unlocked state, the locking pin 51 is disengaged from the locking slot 52.

[0040] like Figure 6 and Fig.11 As shown, the unlocking mechanism includes an unlocking member 6 rotatably arranged on the base through a first axis a, the axis center line of the first axis a is parallel to the axis center line of the second axis b, and when the unlocking member 6 rotates, the locking member, i.e., the lock pin 51, is driven to move along a straight line so that the pressure rod locking mechanism switches between the locked state and the unlocked state. Specifically, the unlocking member 6 includes two cams 61 and a ratchet 62 which are coaxially fixedly connected, wherein the ratchet 62 is located between the two cams 61. The outer periphery of the cam 61 is provided with a protrusion 611 and a groove 612, and the periphery of the ratchet 62 has a plurality of evenly arranged gear teeth 621, and the number of the gear teeth 621 is equal to the sum of the number of the protrusions 611 and the grooves 612 of each cam 61; specifically, in this embodiment, the two cams 61 are arranged in parallel, and each cam 61 has three protrusions 611 and three grooves 612 that are evenly spaced and alternately arranged, and the ratchet 62 has six gear teeth 621, and each gear tooth 621 is located between a pair of protrusions 611 or grooves 612 in the left-right direction.

[0041] like Fig.16 and Fig.17 As shown, the unlocking member pressure rod locking mechanism has two groups corresponding to the two cams 61. When the pressure rod locking mechanism is in the locked state, a pair of protrusions 611 abut against the locking member, i.e., the lock pin 51; Fig.18 and Fig.19 As shown, when the plunger locking mechanism is in the unlocked state, a portion of the locking pin 51 is located in the pair of groove portions 612 .

[0042] like Figure 5 , Fig.10 and Fig.11As shown, a conversion mechanism is provided between the pressure rod 3 and the unlocking member 6. When the pressure rod 3 is pressed, the conversion mechanism can drive the unlocking member 6 to rotate, so that the pressure rod locking mechanism is converted between the locked state and the unlocked state. Specifically, the conversion mechanism includes a pressure block 71 rotatably provided at the locking end 32 of the pressure rod 3 through a third axis c. The upper surface of the pressure block 71 is an arc surface 711, and the lower surface is a plane 712. The axis centerline of the third axis c is parallel to the axis centerlines of the first axis a and the second axis b. When the pressure rod locking mechanism is converted between the locked state and the unlocked state, the unlocking member 6 rotates so that the arc surface 711 abuts against the upper surface of a gear tooth 621 and pushes the unlocking member 6 to rotate. At the same time, the arc surface 711 causes the pressure block 71 to pass over the gear tooth 621 that cooperates with it and cooperate with another gear tooth 621 during the rotation of the unlocking member 6.

[0043] like Fig.11 As shown, a top block slide groove 83 is fixed on the base 2, and a top block 81 that can slide relative to the base 2 in the up and down directions is provided in the top block slide groove 83, and a second elastic member 82 for providing the top block 81 with the force required for the upward movement is provided between the top block 81 and the base 2. When the pressure rod 3 is in a closed state, the top block 81 abuts against the bottom of the pressure rod 3.

[0044] The locking and unlocking process of the child safety seat pressure rod locking mechanism in this embodiment is explained in detail below:

[0045] like Fig.12 and Fig.13 As shown, when the pressure rod 3 is in the open state, the pressure rod locking mechanism is in the unlocked state, the locking pin 51 escapes from the locking groove 52 , and part of the locking pin 51 is located in the pair of groove portions 612 .

[0046] like Fig.14 and Fig.15 As shown, when the pressure rod 3 is converted to the closed state, the pressure rod 3 is pressed down and rotated about the second axis b toward the base 2. After the pressure block 71 contacts the ratchet 62, the pressure rod 3 continues to be pressed down. The arc surface 711 of the pressure block 71 abuts against the upper surface of a gear tooth 621 and pushes the unlocking member 6 to rotate until the unlocking member 6 rotates to the point where the protrusion 611 abuts against the locking pin 51 and pushes it into the locking groove 52, and the pressure rod locking mechanism is converted to a locked state.

[0047] like Fig.16 and Fig.17 As shown, after the lock pin 51 is inserted into the lock slot 52 , the pressure on the pressure rod 3 is removed, and the pressure rod 3 moves upward a short distance under the action of the top block 81 and the second elastic member 82 , and the pressure block 71 moves upward to above another gear tooth 621 .

[0048] like Fig.18 and Fig.19As shown, when the pressure rod locking mechanism is switched to the unlocked state, the pressure rod 3 is pressed again, and the arc surface 711 of the pressure block 71 abuts against the upper surface of the other gear tooth 621 and pushes the unlocking member 6 to rotate until the unlocking member 6 rotates to the position where the groove portion 612 corresponds to the position of the locking pin 51. The locking pin 51 exits the locking groove 52 under the action of the first elastic member 53, so that the pressure rod locking mechanism is unlocked, and the pressure rod 3 can be switched to the open state.

[0049] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A child safety seat, comprising a seat body, a base located at the bottom of the seat body, and a pressure rod for pressing a safety belt against the base, wherein the pressure rod has a closed state in which it is retracted relative to the base and an open state in which it is opened relative to the base, characterized in that: The child safety seat further comprises a pressure rod locking mechanism for locking the pressure rod in the closed state, and an unlocking mechanism for unlocking the pressure rod locking mechanism, the unlocking mechanism at least comprising an unlocking member rotatably arranged on the base via a first axis, a conversion mechanism for driving the unlocking member to rotate when the pressure rod is pressed so that the pressure rod locking mechanism is converted between a locked state and an unlocked state, wherein the pressure rod locking mechanism comprises a locking member which is arranged on the base and can be moved in a straight line, and a matching portion which is arranged on the pressure rod and matches with the locking member, and when the pressure rod locking mechanism is in the locked state, The locking piece is cooperatively connected with the matching portion; when the pressure rod locking mechanism is in the unlocked state, the locking piece is disengaged from the matching portion, and when the unlocking piece rotates, the locking piece is driven to move in a straight line so that the pressure rod locking mechanism is switched between the locked state and the unlocked state, and the unlocking piece at least comprises a cam, and a protrusion and a groove are arranged on the periphery of the cam, and the protrusion and the groove are alternately arranged one by one at uniform intervals on the outer periphery of the cam, and when the pressure rod locking mechanism is in the locked state, the protrusion abuts against the locking piece; when the pressure rod locking mechanism is in the unlocked state, at least a part of the locking piece is located in the groove; The unlocking member further comprises a ratchet wheel coaxially fixedly connected to the cam, and the circumference of the ratchet wheel has a plurality of gear teeth evenly arranged; the pressure rod has a rotating end and a locking end respectively arranged at two different ends in its length direction, and the rotating end is rotatably connected to the base through a second shaft, and the conversion mechanism comprises a pressure block rotatably arranged at the locking end through a third shaft, and when the pressure rod locking mechanism is converted between the locking state and the unlocking state, the pressure block is pressed downward against one of the gear teeth; The upper surface of the pressing block is an arc-shaped surface, and the lower surface of the pressing block is a plane. When the pressing rod locking mechanism is in the locking state, the upper surface of the pressing block abuts against one of the gear teeth and restricts the unlocking member from rotating.

2. The child safety seat according to claim 1, characterized in that: The locking member is a locking pin, the matching portion is a locking groove into which the locking pin can be matched, the pressure rod locking mechanism also includes a first elastic member for providing the locking pin with a force required to move away from the locking groove, and when the pressure rod locking mechanism is in a locked state, the locking pin is inserted in the locking groove; When the pressure rod locking mechanism is in the unlocked state, the locking pin escapes from the locking groove, and the unlocking member rotates to drive the locking pin to move axially, so that the pressure rod locking mechanism switches between the locked state and the unlocked state.

3. The child safety seat according to claim 2, characterized in that: The number of the gear teeth is equal to the sum of the number of the protruding portions and the number of the recessed portions.

4. The child safety seat according to claim 1, characterized in that: The unlocking member includes two cams coaxially fixedly connected and a ratchet wheel coaxially fixed between the two cams, and the pressure rod locking mechanism has two groups arranged corresponding to the two cams.

5. The child safety seat according to claim 1, characterized in that: The axis lines of the first axis, the second axis and the third axis are parallel to each other and extend in the left-right direction.

6. The child safety seat according to any one of claims 1 to 5, characterized in that: The base is provided with a top block which can slide relatively in the up and down directions, and a second elastic member for providing the force required for the top block to move upward is provided between the top block and the base. When the pressure rod is in the closed state, the top block abuts against the bottom of the pressure rod.

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