A headgear adjustment mechanism

Abstract

This utility model discloses a headband adjustment mechanism, including a rear cover, a front cover, an adjustment ring, an adjustment gear, and an anti-reverse rotation and release mechanism. The front cover and the rear cover are fixedly connected, and a transverse guide area is provided between the rear cover and the front cover. Both adjustment rings are slidably installed in the transverse guide area. A positioning post is fixed on the rear cover or the front cover, and the adjustment gear is sleeved on the positioning post. An adjustment rack is provided on the inner wall of the adjustment ring. The adjustment gear is meshed with the adjustment rack of the two adjustment rings for transmission. The anti-reverse rotation and release mechanism is used to limit the reverse rotation of the adjustment gear. The transverse guide area of ​​this adjustment mechanism provides transverse guidance and longitudinal limiting for the adjustment ring, preventing the adjustment ring and its adjustment rack from bending. This improves the stability of the transmission between the adjustment rack and the adjustment gear, and avoids the problem of meshing and jamming. Consumers can directly adjust the tightness of the headband when wearing swimming goggles or diving goggles. The adjustment method is a convenient knob structure, suitable for consumers with different head circumferences.

Description

Technical Field

[0001] This utility model belongs to the field of swimming goggles and diving goggles, and in particular relates to a headband adjustment mechanism for swimming goggles and diving goggles. Background Technology

[0002] Swimming goggles are a piece of equipment used in swimming. Existing swimming goggles usually use a conventional headband adjustment buckle, which cannot be adjusted directly on the head. You have to take off the goggles, adjust them, put them back on, and try them on to see if they fit. If they don't fit, you have to adjust them repeatedly, which is not very intuitive. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a mechanism that allows direct adjustment of the headband length on the head to accommodate consumers with different head circumferences.

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: a headband adjustment mechanism, including a rear cover, a front cover, an adjustment ring, an adjustment gear, and an anti-reverse and release mechanism;

[0005] The front cover and the rear cover are fixedly connected. A transverse guide area is provided between the rear cover and the front cover. Both adjusting rings are slidably installed in the transverse guide area. A positioning post is fixed on the rear cover or the front cover. The adjusting gear is sleeved and installed on the positioning post. The inner wall of the adjusting ring has an adjusting rack. The adjusting gear is meshed with the adjusting rack of the two adjusting rings for transmission. The anti-reverse and release mechanism is used to limit the reverse rotation of the adjusting gear.

[0006] Preferably, the anti-reverse and release mechanism consists of an adjusting ratchet, a knob, and an elastic arm mounted on the front cover. The adjusting ratchet is fixedly connected to the knob and is rotatably mounted on the positioning post. A first ratchet gear is coaxially and fixedly mounted on the adjusting gear, and the ratchet teeth of the adjusting ratchet are arranged in opposite directions to the ratchet teeth of the first ratchet gear.

[0007] The first ratchet has two limiting posts. The adjusting ratchet has two arc grooves that mate with the limiting posts, with the limiting posts located inside the arc grooves, centered on its central axis.

[0008] The second ratchet is located in the second through hole of the front cover. Two elastic arms are symmetrically and fixedly installed in the second through hole of the front cover. The front end of the elastic arm has a pawl. A first cylinder is fixedly installed on the outer surface of the pawl. The pawl cooperates with the first ratchet to restrict the first ratchet from rotating in the opposite direction. The first cylinder is located in the ratchet groove of the adjusting ratchet.

[0009] Preferably, the lateral guide area between the rear cover and the front cover is formed by a baffle fixedly installed on the rear cover or the front cover.

[0010] Preferably, the positioning post is configured as a cylindrical structure, and the adjusting gear and adjusting ratchet are both rotatably installed with clearance fit to the cylindrical structure.

[0011] Preferably, a rotating cover is fixedly installed on the outer end of the knob.

[0012] Preferably, the adjusting ring is configured as a rectangular ring structure.

[0013] Preferably, a limiting body is fixedly provided on the rear cover or the front cover to limit the outward movement of the adjustment ring.

[0014] Preferably, the limiting body is configured as a square limiting block, which is located on the left and right sides of the positioning post and is also located inside the adjusting ring.

[0015] Preferably, the limiting body is an L-shaped limiting plate, which is fixedly installed on the upper and lower sides of the positioning column. The adjusting ring is provided with an L-shaped protrusion that cooperates with the L-shaped limiting plate. After the L-shaped protrusion contacts the L-shaped limiting plate, it can limit the extreme position of the outward movement of the adjusting ring.

[0016] Preferably, the outer end of the front cover is integrally formed with a collar that is coaxial with the second through hole, and the inner end of the rotating cover is placed inside the collar.

[0017] Compared with the prior art, the advantages of this utility model are: the lateral guide area of ​​this adjustment mechanism forms a lateral guide and longitudinal limit effect on the adjustment ring, avoiding bending of the adjustment ring and its adjustment rack, improving the stability of the transmission between the adjustment rack and the adjustment gear, and preventing the problem of meshing and transmission jamming. When consumers wear swimming goggles or diving goggles, they can directly adjust the tightness of the headband. The adjustment method is a convenient knob structure, which is suitable for consumers with different head circumferences. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is the front view of this utility model.

[0020] Figure 2 This is a three-dimensional view of the internal structure of this utility model.

[0021] Figure 3 This is a structural diagram showing that the limiting body is set as a square limiting block.

[0022] Figure 4 This is a structural diagram showing that the limiting body is set as an L-shaped limiting plate.

[0023] Figure 5 This is a diagram showing the installation structure of the knob and the front cover.

[0024] Figure 6 This is a diagram showing the installation structure of the first ratchet wheel of the pawl.

[0025] Figure 7 This is a diagram showing the installation structure of the limiting post and the arc groove.

[0026] Figure 8 This is a 3D view of the front cover.

[0027] Figure 9 It is a 3D diagram of the gear, the first ratchet, and the knob.

[0028] Figure 10 This is a sectional view of the installation structure of the rotating cover and the collar. Detailed Implementation

[0029] The present invention will now be described in detail with reference to specific embodiments:

[0030] like Figures 1 to 10 The headband adjustment mechanism shown includes a rear cover 1, a front cover 2, an adjustment ring 3, an adjustment gear 41, and an anti-reverse and release mechanism;

[0031] The front cover 2 is fixedly connected to the rear cover 1. A transverse guide area is provided between the rear cover 1 and the front cover 2. Both adjusting rings 3 are slidably installed in the transverse guide area. A positioning post 13 is fixed on the rear cover 1 or the front cover 2. An adjusting gear 41 is sleeved on the positioning post 13. An adjusting rack 31 is provided on the inner wall of the adjusting ring 3. The adjusting gear 41 is meshed with the adjusting rack 31 of the two adjusting rings 3 for transmission. An anti-reverse and release mechanism is used to limit the reverse rotation of the adjusting gear 41. A headband is fixedly connected to the outer end of the adjusting ring 3.

[0032] The anti-reverse and release mechanism consists of an adjusting ratchet 42, a knob 5, and an elastic arm 21 set on the front cover 2. The adjusting ratchet 42 is fixedly connected to the knob 5. The adjusting ratchet 42 is rotatably sleeved on the positioning post 13. The adjusting gear 41 is coaxially and fixedly provided with a first ratchet 421. The ratchet teeth of the adjusting ratchet 42 and the ratchet teeth of the first ratchet 421 are arranged in opposite directions.

[0033] The first ratchet 421 has two limiting posts 43. The adjusting ratchet 42 is provided with two arc grooves 50 around its central axis that cooperate with the limiting posts 43. The limiting posts 43 are located in the arc grooves 50. The arc length of the arc groove 50 is 1.6 times the diameter of the limiting post 43. When the arc groove 50 rotates relative to the limiting post 43, it can lift the elastic arm 21, so that the pawl 22 at the front end of the elastic arm 21 separates from the first ratchet 42 and has a contact limiting effect.

[0034] The second ratchet 51 is located inside the second through hole 20 of the front cover 2. Two elastic arms 21 are symmetrically and fixedly installed inside the second through hole 20 of the front cover 2. The front end of the elastic arm 21 has a pawl 22. A first cylinder 23 is fixedly installed on the outer surface of the pawl 22. The pawl 22 cooperates with the first ratchet 42 to restrict the first ratchet 42 from rotating in the opposite direction. The first cylinder 23 is located in the ratchet groove of the adjusting ratchet 42.

[0035] The lateral guide area located between the rear cover 1 and the front cover 2 is formed by a baffle 11 fixedly installed on the rear cover 1 or the front cover 2.

[0036] The positioning post 13 is configured as a cylindrical structure, and the adjusting gear 41 and adjusting ratchet 42 are both rotatably installed with clearance fit to the cylindrical structure.

[0037] A rotating cover 6 is fixedly installed on the outer end of the knob 5. The rotating cover 6 facilitates the rotation of the knob 5.

[0038] The adjusting ring 3 is configured as a rectangular ring structure. There is a 1-2mm gap between the adjusting gear 41 and the flat end of the inner wall of the adjusting ring 3. The flat end is the non-adjusting rack 31 end. The adjusting ring 3 is restricted by the adjusting gear 41 to prevent it from wobbling up and down, which improves the stability of the adjusting ring 3 when it moves left and right.

[0039] A limiting body 12 is fixedly provided on the rear cover 1 or the front cover 2 to limit the outward movement of the adjusting ring 3, so as to prevent the adjusting gear 41 from disengaging from the adjusting rack 31 of the adjusting ring 3.

[0040] like Figure 3 As shown, the limiting body 12 is configured as a square limiting block, which is located on the left and right sides of the positioning post 13. The square limiting block is also located inside the adjusting ring 3. The square limiting block has the advantage of high structural strength.

[0041] like Figure 4 As shown, the limiting body 12 is configured as an L-shaped limiting plate, which is fixedly installed on the upper and lower sides of the positioning post 13. The adjusting ring 3 is provided with an L-shaped protrusion 32 that cooperates with the L-shaped limiting plate. After the L-shaped protrusion 32 contacts the L-shaped limiting plate, it can limit the extreme position of the outward movement of the adjusting ring 3. The cooperation between the L-shaped protrusion 32 and the L-shaped limiting plate can improve the extreme position of the outward movement of the two adjusting rings 3, thereby extending the adjustment stroke. The L-shaped limiting also serves to guide the adjusting ring 3 laterally and limit its longitudinal movement.

[0042] like Figure 10 As shown, the outer end of the front cover 2 is integrally formed with a collar 24 that is coaxial with the second through hole 20, and the inner end of the rotating cover 6 is placed inside the collar 24. There is no planar gap between the front cover 2 and the rotating cover 6, which can avoid the problem of hair getting caught.

[0043] When adjusting the headband: Turn the knob 5 clockwise. The arc groove 50 of the knob 5 will drive the combination of the limit post 43, the adjusting ratchet 42 and the adjusting gear 41 to rotate clockwise in sync. The adjusting gear 41 will drive the two adjusting rings 3 with the adjusting rack 31 to move inward in sync. Under the action of the elastic arm 21, the pawl 22 will act on the adjusting ratchet 42 to prevent the adjusting ratchet 42 from rotating counterclockwise and tighten the headband.

[0044] When adjusting the headband: Turn the knob 5 counterclockwise. There is a movable gap between the arc groove 50 and the limiting post 43. First, the knob 5 turns counterclockwise. The second ratchet 51 pushes the second cylinder 23 on the pawl 22 at the front end of the elastic arm 21 to lift up, so that the pawl 22 separates from the adjusting ratchet 42, releasing the restriction on the adjusting ratchet 42. The combination of the adjusting ratchet 42 and the adjusting gear 41 can rotate counterclockwise. After the other end of the arc groove 50 contacts the limiting post 43, the knob 5 drives the adjusting ratchet 42 and the adjusting gear 41 to rotate counterclockwise synchronously. At this time, the adjusting gear 41 drives the two adjusting rings 3 with adjusting racks 31 to move inward synchronously, loosening the headband.

Claims

1. A headband adjustment mechanism, characterized in that: It includes a rear cover (1), a front cover (2), an adjusting ring (3), an adjusting gear (41), and an anti-reverse and release mechanism; The front cover (2) is fixedly connected to the rear cover (1). A transverse guide area is provided between the rear cover (1) and the front cover (2). Both adjusting rings (3) are slidably installed in the transverse guide area. A positioning post (13) is fixed on the rear cover (1) or the front cover (2). The adjusting gear (41) is sleeved on the positioning post (13). The inner wall of the adjusting ring (3) has an adjusting rack (31). The adjusting gear (41) is meshed with the adjusting rack (31) of the two adjusting rings (3) for transmission. The anti-reverse and release mechanism is used to limit the reverse rotation of the adjusting gear (41).

2. The headband adjustment mechanism according to claim 1, characterized in that: The anti-reverse and release mechanism consists of an adjusting ratchet (42), a knob (5), and an elastic arm (21) set on the front cover (2). The adjusting ratchet (42) is fixedly connected to the knob (5). The adjusting ratchet (42) is rotatably mounted on the positioning column (13). The adjusting gear (41) is coaxially and fixedly provided with a first ratchet (421). The ratchet teeth of the adjusting ratchet (42) and the ratchet teeth of the first ratchet (421) are set in opposite directions. The first ratchet (421) has two limiting posts (43). The adjusting ratchet (42) is provided with two arc grooves (50) that cooperate with the limiting posts (43) around its central axis. The limiting posts (43) are located in the arc grooves (50). The second ratchet (51) is located in the second through hole (20) of the front cover (2). Two elastic arms (21) are symmetrically and fixedly installed in the second through hole (20) of the front cover (2). The front end of the elastic arm (21) has a pawl (22). A first cylinder (23) is fixedly installed on the outer surface of the pawl (22). The pawl (22) cooperates with the first ratchet (42) to restrict the first ratchet (42) from rotating in the opposite direction. The first cylinder (23) is located in the ratchet groove of the adjusting ratchet (42).

3. The headband adjustment mechanism according to claim 1, characterized in that: The lateral guide area between the rear cover (1) and the front cover (2) is formed by a baffle (11) fixedly installed on the rear cover (1) or the front cover (2).

4. The headband adjustment mechanism according to claim 1, characterized in that: The positioning column (13) is configured as a cylindrical structure, and the adjusting gear (41) and adjusting ratchet (42) are both rotated and fitted with the cylindrical structure with clearance.

5. The headband adjustment mechanism according to claim 2, characterized in that: A rotating cover (6) is fixedly installed on the outer end of the knob (5).

6. The headband adjustment mechanism according to claim 1, characterized in that: The adjusting ring (3) is configured as a rectangular ring structure.

7. The headband adjustment mechanism according to claim 1, characterized in that: The rear cover (1) or the front cover (2) is fixedly provided with a limiting body (12) to limit the outward movement limit position of the adjusting ring (3).

8. The headband adjustment mechanism according to claim 7, characterized in that: The limiting body (12) is set as a square limiting block, which is located on the left and right sides of the positioning column (13) and is also located inside the adjusting ring (3).

9. The headband adjustment mechanism according to claim 8, characterized in that: The limiting body (12) is set as an L-shaped limiting plate. The L-shaped limiting plate is fixedly installed on the upper and lower sides of the positioning column (13). The adjusting ring (3) is provided with an L-shaped protrusion (32) that cooperates with the L-shaped limiting plate. After the L-shaped protrusion (32) contacts the L-shaped limiting plate, it can limit the extreme position of the adjusting ring (3) moving outward.

10. The headband adjustment mechanism according to claim 5, characterized in that: The outer end of the front cover (2) is integrally formed with a collar (24) that is coaxial with the second through hole (20), and the inner end of the rotating cover (6) is placed inside the collar (24).

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