A child protective chain cover structure

Abstract

The utility model relates to a bicycle chain cover technical field, concretely is a child protection chain cover structure, including inner cover and outer cover, and the inner cover and outer cover are respectively the oval shell of front end opening and, the side of inner cover is sequentially set up rear axle through -hole no.

Description

Technical Field

[0001] This utility model relates to the field of bicycle chain guard technology, specifically a child-protective chain guard structure. Background Technology

[0002] Currently, the chain guards on existing bicycles on the market do not cover the chain; they are exposed. Children's fingers can reach the point where the chain is tangent from the inside of the chain guard, which could cause potential injury. If a child's hand reaches the point where the chain is tangent to the freewheel from the inside of the chain guard, it could cause finger injury. Therefore, a child-protective chain guard structure is proposed. Utility Model Content

[0003] To overcome the technical deficiencies in the prior art and effectively solve the technical problems in the background art, this utility model provides the following technical solution:

[0004] A child safety chain cover structure includes an inner cover and an outer cover. The inner cover is an elliptical shell with an open front end, and the outer cover is an elliptical shell with an open rear end. The inner cover has a rear axle through hole 1, a crossbeam through hole, and a central axle through hole 1 sequentially opened from left to right on its side. The inner cover also has a rear axle through hole 2 and a central axle through hole 2, which correspond to the rear axle through hole 1 and the central axle through hole 1, respectively, on its side. An installation gap is formed at the middle of the left end of the inner cover, which connects the rear axle through hole 1 and the crossbeam through hole sequentially. A fixing ring is integrally and symmetrically arranged on the rear side of the inner cover at the positions above and below the installation gap. A fixing mechanism is correspondingly arranged in the two fixing rings. A slot is formed on the front edge of the inner cover to engage with the rear side of the outer cover.

[0005] As a preferred technical solution of this utility model, both the inner cover and the outer cover are elastic plastic shells. The inner cover is an elliptical shell with an outer diameter on the side of the central through hole one being larger than the outer diameter on the side of the rear through hole one. The outer cover is an elliptical shell with an outer diameter on the side of the central through hole two being larger than the outer diameter on the side of the rear through hole two.

[0006] As a preferred technical solution of this utility model, the outer side of the slot is provided with buckle grooves evenly distributed along the circumference of the ellipse, and the inner side of the outer cover is provided with buckles that engage with the buckle grooves evenly distributed along the circumference of the ellipse. The lower rear edge of the buckle is provided with a guide slope.

[0007] As a preferred technical solution of this utility model, the inner cover has a fixing hole 1 evenly distributed on the side of the inner cover located outside the central through hole 1, and a fixing hole 2 symmetrically distributed on the side of the inner cover located on both sides of the upper side of the crossbeam through hole.

[0008] As a preferred embodiment of this utility model, the outer edge of the rear side of the inner cover is an arc-shaped bevel.

[0009] As a preferred technical solution of this utility model, the fixing mechanism is a fixing component one, which includes a fixing bolt and a fixing nut. The tail end of the fixing bolt passes through two fixing rings from top to bottom, and the tail end of the fixing bolt located below the two fixing rings is threaded with a fixing nut.

[0010] As a preferred technical solution of this utility model, the fixing mechanism is a second fixing component, which includes a fixing pin, elastic columns and limiting protrusions. The tail end of the fixing pin is provided with a cross groove, which divides the tail end of the fixing pin into four elastic columns. The elastic columns pass through two fixing rings in sequence. The tail ends of the four elastic columns located below the two fixing rings are respectively provided with limiting protrusions. The upper surface of the limiting protrusions abuts against the bottom of the fixing ring located below the installation gap.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This child safety chain cover structure is reasonable and practical, easy to operate, and can completely cover the chain, preventing children's fingers from reaching the tangent point of the chain, thus avoiding the potential danger of finger injury. Specifically, the installation gap facilitates the flexible installation and insertion of the inner cover with the rear axle through hole one and the crossbeam through hole. The fixing holes one and two facilitate the fixed connection of the inner cover to the frame. The fixing mechanism facilitates the connection and fixing of the installation gap of the inner cover after installation. By fitting the outer cover on the outside of the slot and pressing the inner cover and the outer cover, while the outer cover is engaged with the slot, the buckle on the outer cover is guided and squeezed into the buckle groove by the guide slope, completing the engagement and fastening of the inner cover and the outer cover. The inner cover and the outer cover after engagement form a protective chain cover structure that corresponds well with the central axle, rear axle, flywheel, frame, and chain of the new car, which can completely cover the chain for comprehensive protection. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the structure of the inner cover of this utility model.

[0014] Figure 3 This is a rear view structural diagram of the inner cover of this utility model.

[0015] Figure 4 This is a rear view structural diagram of the outer cover of this utility model.

[0016] Figure 5 This is a rear view structural diagram of Embodiment 1 of the present utility model.

[0017] Figure 6This is a structural schematic diagram of the fixing component 1 in Embodiment 1 of this utility model.

[0018] Figure 7 This is a rear view structural diagram of Embodiment 2 of the present utility model.

[0019] Figure 8 This is a bottom view of the second fixing component of Embodiment 2 of this utility model.

[0020] In the diagram: Inner cover 1, Outer cover 2, Rear axle through hole 1 3, Crossbeam through hole 4, Central axle through hole 1 5, Installation gap 6, Fixing component 1 7, Fixing bolt 71, Fixing nut 72, Fixing ring 8, Fixing component 2 9, Fixing pin 91, Elastic column 92, Limiting protrusion 93, Slot 10, Buckle slot 11, Rear axle through hole 2 12, Central axle through hole 2 13, Buckle 14, Fixing hole 1 15, Fixing hole 2 16, Arc-shaped bevel 17. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1:

[0023] Please see Figure 1-6 This utility model provides a technical solution: a child protective chain cover structure, including an inner cover 1 and an outer cover 2. The inner cover 1 is an elliptical shell with an open front end, and the outer cover 2 is an elliptical shell with an open rear end. The inner cover 1 has a rear axle through hole 3, a crossbeam through hole 4 and a central axle through hole 5 sequentially opened from left to right on its side. The inner cover 1 also has a rear axle through hole 12 and a central axle through hole 13 sequentially opened from left to right on its side. The left end of the inner cover 1 has an installation gap 6 that connects the rear axle through hole 3 and the crossbeam through hole 4 sequentially. The installation gap 6 facilitates the elastic installation and insertion of the inner cover 1 with the rear axle through hole 3 and the crossbeam through hole 4. The rear side of the inner cover 1 is symmetrically and integrally provided with fixing rings 8 on both sides of the installation gap 6. The two fixing rings 8 are respectively provided with fixing mechanisms. The front edge of the inner cover 1 is provided with a slot 10 that is movable and engages with the rear side of the outer cover 2.

[0024] Furthermore, both the inner cover 1 and the outer cover 2 are elastic plastic shells, which facilitate elastic deformation during installation. The inner cover 1 is an elliptical shell with an outer diameter on the side of the central axle through hole 5 that is larger than the outer diameter on the side of the rear axle through hole 3. The outer cover 2 is an elliptical shell with an outer diameter on the side of the central axle through hole 13 that is larger than the outer diameter on the side of the rear axle through hole 12. This allows the inner cover 1 and the outer cover 2 to better match and protect the central axle, rear axle, flywheel, and frame of the new vehicle.

[0025] Furthermore, such as Figure 3 As shown, the outer side of the slot 10 is provided with evenly distributed fastening slots 11 along the circumferential direction of the ellipse, such as... Figure 4 As shown, the inner side of the outer cover 2 is integrally provided with buckles 14 that are evenly distributed along the circumference of the ellipse and engage with the buckle groove 11, such as... Figure 3 As shown, the lower rear edge of the buckle 14 is provided with a guide slope. By fitting the outer cover 2 onto the outside of the slot 10 and pressing the inner cover 1 and the outer cover 2, while the outer cover 2 is engaged with the slot 10, the buckle 14 on the outer cover 2 is guided and squeezed into the buckle groove 11 by the guide slope, thus completing the engagement and fastening of the inner cover 1 and the outer cover 2.

[0026] Furthermore, such as Figure 3 As shown, fixing holes 15 are evenly distributed on the side of the inner cover 1 outside the central shaft through hole 5. Fixing holes 16 are symmetrically distributed on the side of the inner cover 1 on both sides above the crossbeam through hole 4. Fixing holes 15 and fixing holes 16 facilitate the fixed connection between the inner cover 1 and the frame.

[0027] Furthermore, such as Figure 3 As shown, the outer edge of the rear side of the inner cover 1 is an arc-shaped bevel 17. The arc-shaped bevel 17 can ensure that the chain guard will not rub against the freewheel, spokes and hub during riding, thus preventing abnormal noise.

[0028] Furthermore, the fixing mechanism is fixing component 7, such as... Figure 6 As shown, the fixing component 7 includes a fixing bolt 71 and a fixing nut 72. The tail end of the fixing bolt 71 passes through two fixing rings 8 from top to bottom. The tail end of the fixing bolt 71 located below the two fixing rings 8 is threaded with a fixing nut 72. The fixing bolt 71, the fixing nut 72 and the two fixing rings 8 facilitate the connection and fixing of the inner cover 1 at the installation gap 6 after installation.

[0029] When using:

[0030] The installation gap 6 facilitates the flexible installation and insertion of the inner cover 1 with the rear axle through hole 3 and the crossbeam through hole 4. The fixing holes 15 and 16 facilitate the fixed connection of the inner cover 1 with the frame. The fixing bolts 71, fixing nuts 72, and two fixing rings 8 facilitate the connection and fixation of the inner cover 1 at the installation gap 6 after installation. By fitting the outer cover 2 on the outside of the slot 10 and pressing the inner cover 1 and the outer cover 2, while the outer cover 2 is engaged with the slot 10, the buckle 14 on the outer cover 2 is guided and squeezed into the buckle groove 11 by the guide slope, thus completing the engagement and fastening of the inner cover 1 and the outer cover 2. After being engaged and fixed, the inner cover 1 and the outer cover 2 form a protective chain cover structure that corresponds well with the vehicle's central axle, rear axle, flywheel, frame, and chain, which can completely cover the chain for comprehensive protection.

[0031] Example 2:

[0032] Please see Figure 7-8 This embodiment is identical to Embodiment 1 in all other respects, except that the fixing mechanism is replaced with fixing component 29. Specifically, as shown below... Figure 8 As shown, the fixing component 2 9 includes a fixing pin 91, an elastic post 92, and a limiting protrusion 93. The tail end of the fixing pin 91 is provided with a cross groove, which divides the tail end of the fixing pin 91 into four elastic posts 92. The elastic posts 92 pass through two fixing rings 8 in sequence. The tail ends of the four elastic posts 92 located below the two fixing rings 8 are respectively provided with a limiting protrusion 93. The upper surface of the limiting protrusion 93 abuts against the bottom of the fixing ring 8 located below the installation gap 6. Through the cooperation of the fixing pin 91, the elastic post 92, the limiting protrusion 93, and the two fixing rings 8, the installation gap 6 of the installed inner cover 1 can be more conveniently and quickly elastically squeezed and fixed.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A child safety chain shield structure, comprising an inner cover (1) and an outer cover (2), wherein the inner cover (1) is an elliptical shell with an opening at the front end, and the outer cover (2) is an elliptical shell with an opening at the rear end, characterized in that: The inner cover (1) has a rear axle through hole 1 (3), a crossbeam through hole (4) and a central axle through hole 1 (5) sequentially opened from left to right on the side. The inner cover (1) also has a rear axle through hole 2 (12) and a central axle through hole 2 (13) sequentially opened from left to right on the side. The middle of the left end of the inner cover (1) has an installation gap (6) that connects the rear axle through hole 1 (3) and the crossbeam through hole (4) sequentially. The rear side of the inner cover (1) is symmetrically and integrally provided with fixing rings (8) on the upper and lower sides of the installation gap (6). The two fixing rings (8) are respectively provided with fixing mechanisms. The front edge of the inner cover (1) is provided with a slot (10) that is movable and engages with the rear side of the outer cover (2).

2. The child safety chain shield structure according to claim 1, characterized in that: The inner cover (1) and the outer cover (2) are both elastic plastic shells. The inner cover (1) is an elliptical shell with an outer diameter on the side of the central shaft through hole one (5) that is larger than the outer diameter on the side of the rear shaft through hole one (3). The outer cover (2) is an elliptical shell with an outer diameter on the side of the central shaft through hole two (13) that is larger than the outer diameter on the side of the rear shaft through hole two (12).

3. The child safety chain shield structure according to claim 1, characterized in that: The outer side of the slot (10) is provided with a buckle groove (11) evenly distributed along the circumference of the ellipse. The inner side of the outer cover (2) is provided with a buckle (14) that engages with the buckle groove (11) evenly distributed along the circumference of the ellipse. The lower edge of the rear end of the buckle (14) is provided with a guide slope.

4. The child safety chain shield structure according to claim 1, characterized in that: The inner cover (1) has a fixing hole 1 (15) evenly distributed on the side outside the central through hole 1 (5), and a fixing hole 2 (16) symmetrically distributed on the side of the inner cover (1) on both sides above the crossbeam through hole (4).

5. The child safety chain shield structure according to claim 1, characterized in that: The outer edge of the rear side of the inner cover (1) is an arc-shaped bevel (17).

6. The child safety chain shield structure according to claim 1, characterized in that: The fixing mechanism is a fixing component one (7), which includes a fixing bolt (71) and a fixing nut (72). The tail end of the fixing bolt (71) passes through two fixing rings (8) from top to bottom. The tail end of the fixing bolt (71) located below the two fixing rings (8) is threaded with a fixing nut (72).

7. The child safety chain shield structure according to claim 1, characterized in that: The fixing mechanism is a fixing component two (9), which includes a fixing pin (91), an elastic column (92) and a limiting protrusion (93). The tail end of the fixing pin (91) is provided with a cross groove, which divides the tail end of the fixing pin (91) into four elastic columns (92). The elastic columns (92) pass through two fixing rings (8) in sequence. The tail ends of the four elastic columns (92) located below the two fixing rings (8) are respectively provided with a limiting protrusion (93). The upper surface of the limiting protrusion (93) abuts against the bottom of the fixing ring (8) located below the installation gap (6).

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