Tightness-adjustable head lamp belt

Abstract

The utility model discloses a headlight band with adjustable tightness, which relates to the technical field of headlight bands, and comprises a rear sleeve, a sleeve cover clamped with the rear sleeve, a first headband and a second headband which are positioned between the rear sleeve and the sleeve cover, and a rotary cover arranged on one side of the sleeve cover far away from the rear cover, a gear block is engaged between the two tooth grooves, the center of the sleeve cover communicates with a sleeve, and limiting teeth are designed in the sleeve; the limiting teeth with a certain radian are arranged in the sleeve, the limiting arm matched with the limiting teeth is designed on the gear block, when the first head band and the second head band are pulled by external force to drive the gear block to rotate, the gear block can drive the limiting arm to rotate, one end of the limiting arm is connected with the limiting teeth in a clamped mode, and the limiting arm can rotate. The gear block is limited, and the situation that the first head band and the second head band are loosened is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of headlight belts, in particular to an elastically adjustable headlight belt. Background Art

[0002] A headlamp is a lighting tool worn on the user's head. The headlight band is an important component of the headlamp. For example, the authorized publication number CN211232464U discloses an adjustable headlight band. The gears are driven to rotate by a knob. The gears move relative to or away from headband A and headband B through the meshing gear grooves, thereby achieving the effect of adjusting the length of headband A and headband B.

[0003] There are still certain problems when using the above-mentioned headlight strap. For example, the headlight strap uses gear grooves designed on headband A and headband B to engage with gears. When the gears rotate, the gears move relative to or away from headband A and headband B through the meshing gear grooves. Although the purpose of adjusting the length can be achieved, it lacks a structure to limit the gears. After the adjustment is completed, headband A and headband B are easily driven to rotate by external forces, causing the headlight strap to loosen, resulting in the need for repeated adjustment. Utility Model Content

[0004] The purpose of the present invention is to provide an adjustable elastic headlight belt to solve the problems raised in the above background technology.

[0005] To solve the above technical problems, the present invention provides the following technical solution: comprising a back cover, a cover engaged with the back cover, a first headband and a second headband located between the back cover and the cover, and a rotating cover disposed on a side of the cover away from the back cover, characterized in that: teeth are formed on opposite ends of the first headband and the second headband, and a gear block is engaged between the two teeth.

[0006] The center of the sleeve is connected to a sleeve, the interior of the sleeve is designed with limiting teeth, the interior of the rotating cover is symmetrically equipped with limiting columns, the surface of the gear block is symmetrically fixed with limiting arms that are engaged with the limiting columns, and the limiting arms are selectively engaged with the limiting teeth.

[0007] In a further embodiment, the included angle of the limiting teeth is designed to be arc-shaped, and the contact point between the limiting arm and the limiting teeth is designed to be arc-shaped.

[0008] In a further embodiment, a rotating column rotatably connected to the gear block is fixedly connected to the interior of the rear sleeve, and one end of the rotating column passes through the exterior of the rotating cover and is screwed to a limiting bolt engaged with the rotating cover.

[0009] In a further embodiment, the surfaces of the first headband and the surfaces of the second headband both begin to have ventilation holes.

[0010] In a further embodiment, one end of the first headband and one end of the second headband are both clamped with connecting pieces, and a forehead pad is clamped between the two connecting pieces.

[0011] In a further embodiment, an elastic band is clamped between the rear cover and the forehead pad.

[0012] In a further embodiment, the limiting arm is made of plastic.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The utility model arranges limiting teeth with a certain curvature inside the sleeve, and designs a limiting arm on the gear block to cooperate with the limiting teeth. When the first headband and the second headband are pulled by an external force and the gear block is driven to rotate, the gear block can drive the limiting arm to rotate, and one end of the limiting arm is engaged with the limiting teeth to limit the gear block, thereby preventing the first headband and the second headband from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of the installation of the first headband, the second headband and the back cover in an embodiment of the present utility model;

[0017] Figure 3 This is a structural diagram of the rear cover of an embodiment of the utility model;

[0018] Figure 4 This is an exploded schematic diagram of the rotating cover and the gear block according to an embodiment of the present utility model;

[0019] Figure 5 This is a schematic structural diagram of a sleeve according to an embodiment of the present utility model.

[0020] In the figure: 1. back cover; 2. cover; 3. first headband; 4. second headband; 5. rotating cover; 6. tooth groove; 7. gear block; 8. sleeve; 9. limit teeth; 10. limit column; 11. limit arm; 12. rotating column; 13. limit bolt; 14. ventilation hole slot; 15. connecting piece; 16. forehead pad; 17. elastic band. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example 1

[0023] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, an adjustable elastic headlight strap comprises a back cover 1, a cover 2 engaged with the back cover 1, a first headband 3 and a second headband 4 between the back cover 1 and the cover 2, and a rotating cover 5 arranged on the side of the cover 2 away from the back cover, the first headband 3 and the second headband 4 are provided with a tooth groove 6 at one end opposite to the other, and a gear block 7 is engaged between the two tooth grooves 6. The headlight strap comprises the back cover 1, the cover 2 engaged with the back cover 1, and the first headband 3 and the second headband 4 designed in the back cover 1, the first headband 3 and the second headband 4 are provided with a tooth groove 6 at one end of the back cover 1, when the gear block 7 rotates, the first headband 3 and the second headband 4 are subjected to force due to the tooth groove 6 driven by the gear block 7, and the first headband 3 and the second headband 4 move out of the back cover 1 or are retracted into the back cover 1, so as to achieve the purpose of adjusting the length of the first headband 3 and the second headband 4;

[0024] The center of the sleeve cover 2 is connected with a sleeve 8, and the interior of the sleeve 8 is designed with a limit tooth 9. The interior of the rotating cover 5 is symmetrically equipped with a limit column 10. The surface of the gear block 7 is symmetrically fixed with a limit arm 11 that is engaged with the limit column 10. The limit arm 11 is selectively engaged with the limit tooth 9. Figure 1 、 Figure 4 and Figure 5 As shown, a limiting arm 11 with an arc-shaped end is installed on the gear block 7, and a sleeve 8 is designed on the cover 2. The interior of the sleeve 8 is provided with an arc-shaped limiting tooth 9 at the included angle. When the first headband 3 and the second headband 4 drive the gear block 7 to rotate under the action of external force, the gear block 7 drives the two limiting arms 11 to rotate, and the arc surface at one end of the limiting arm 11 contacts the arc surface on the limiting tooth 9. The limiting arm 11 is subjected to a certain resistance from the limiting tooth 9. The limiting arm 11 transfers the resistance to the gear block 7 to prevent the first headband 3 and the second headband 4 from driving the gear to rotate.

[0025] Specifically, when the rotating cover 5 rotates with the rotating column 12 as the axis, the rotating cover 5 drives the limiting column 10 to rotate. Because the limiting arm 11 on the gear block 7 is inserted into the limiting column 10, the rotating cover 5 can drive the gear block 7 to rotate with the rotating rod as the axis under the action of the limiting column 10, and the gear block 7 drives the first headband 3 and the second headband 4 to adjust their lengths under the action of the tooth groove 6. Because the arc surface at one end of the limiting arm 11 contacts the arc surface on the limiting tooth 9, when it is not rotating, the arc surface at one end of the limiting arm 11 contacts the arc surface on the limiting tooth 9 and limits each other. When the user applies a rotating force, the arc surface at one end of the limiting arm 11 and the arc surface on the limiting tooth 9 squeeze each other. The limiting arm 11 is made of plastic and has a certain resilience. The arc surface at one end of the limiting arm 11 and the arc surface on the limiting tooth 9 are staggered, thereby achieving rotation and limiting purposes.

[0026] Furthermore, the surfaces of the first headband 3 and the second headband 4 are both provided with ventilation holes 14, one end of the first headband 3 and one end of the second headband 4 are both clamped with a connector 15, a forehead pad 16 is clamped between the two connectors 15, and an elastic band 17 is clamped between the back cover 1 and the forehead pad 16. Figure 1 First, when the user wears the headlight belt, the ventilation holes 14 can provide ventilation for the user. Secondly, the use of the connector 15 and the forehead pad 16 can facilitate the wearing of the entire headlight belt on the user's head and facilitate the installation of an external headlamp. Finally, the use of the elastic band 17 can fix the elastic band 17 on the top of the user's head when the user wears the headlight belt, preventing the headlight belt from slipping and helping to improve the stability of the fixation.

[0027] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable elastic headlight strap, comprising a rear cover (1), a cover (2) snap-fitted to the rear cover (1), a first headband (3) and a second headband (4) disposed between the rear cover (1) and the cover (2), and a rotating cover (5) disposed on a side of the cover (2) away from the rear cover, characterized in that: A tooth groove (6) is provided at one opposite end of the first headband (3) and the second headband (4), and a gear block (7) is meshed between the two tooth grooves (6); The center of the sleeve cover (2) is connected to a sleeve (8), the interior of the sleeve (8) is designed with limiting teeth (9), the interior of the rotating cover (5) is symmetrically equipped with limiting posts (10), and the surface of the gear block (7) is symmetrically fixed with limiting arms (11) that are engaged with the limiting posts (10), and the limiting arms (11) are selectively engaged with the limiting teeth (9).

2. The adjustable elastic headlight strap according to claim 1, characterized in that: The included angle of the limiting teeth (9) is designed to be arc-shaped, and the contact point between the limiting arm (11) and the limiting teeth (9) is designed to be arc-shaped.

3. The adjustable elastic headlight strap according to claim 1, characterized in that: A rotating column (12) rotatably connected to the gear block (7) is fixedly connected to the interior of the rear sleeve (1); one end of the rotating column (12) passes through the exterior of the rotating cover (5) and is screwed to a limiting bolt (13) that is clamped to the rotating cover (5).

4. The adjustable elastic headlight strap according to claim 1, characterized in that: Both the surface of the first headband (3) and the surface of the second headband (4) begin to have ventilation holes (14).

5. The adjustable elastic headlight strap according to claim 1, characterized in that: One end of the first headband (3) and one end of the second headband (4) are both clamped with a connecting piece (15), and a forehead pad (16) is clamped between the two connecting pieces (15).

6. The adjustable elastic headlight strap according to claim 5, characterized in that: An elastic band (17) is clamped between the rear cover (1) and the forehead pad (16).

7. The adjustable elastic headlight strap according to claim 1, characterized in that: The material of the limiting arm (11) is plastic.

Images