Screwdriver bit capable of quickly adjusting screwing depth

Abstract

The utility model discloses a screwdriver bit capable of quickly adjusting screwing depth, which comprises a bit body, a mounting hole arranged at the head of the bit body for mounting a bit, a bushing sleeved outside the bit body, a return spring arranged between the bottom of the bushing and the bit body, and a stop ring arranged at the top of the bushing through a quick adjusting structure. The rapid adjusting structure comprises an adjusting ring, an inclined long hole is formed in the side wall of the adjusting ring, and a plurality of stepped clamping grooves are formed in the upper side face of the inclined long hole. An elastic reset structure is arranged between the tail portion of an inner hole of the adjusting ring and the middle of the outer wall of the lining, a clamping protruding column is arranged on the side wall of the lining, and the clamping protruding column extends into the inclined long hole and is clamped into one of the stepped clamping grooves to achieve stopping. According to the screwdriver bit designed by the utility model, the height adjustment of the stop ring can be quickly realized, the phenomena of looseness and displacement of the stop ring during operation are fundamentally avoided, and the consistency of the screwing depth of a screw is ensured.

Description

Technical Field

[0001] This utility model relates to a screwdriver bit, specifically a screwdriver bit with adjustable screwing depth. Background Technology

[0002] When screwing in plasterboard, a special plasterboard screwdriver bit is used. Using this bit ensures that the end of the screw is flush with the plasterboard surface, providing a better wall surface environment for subsequent painting.

[0003] To meet the needs of different screw screw insertion depths, a stop ring height adjustment structure is provided between the stop ring and the bushing of the screwdriver bit. The existing adjustment structure has an adjustment ring threaded on the outside of the bushing and a locking ring below the adjustment ring. In use, the height difference between the stop ring and the top of the screwdriver bit is adjusted by rotating the thread of the adjustment ring, and the locking ring is used to lock and position the screwdriver bit after adjustment.

[0004] After years of use, it has been found that the adjustment speed of the threaded adjustment ring is relatively slow. At the same time, the entire bit will vibrate at high frequency during operation. This high frequency vibration will cause the locking ring to loosen, which will lead to the height displacement of the stop ring and cause errors. Ultimately, the screw will not be screwed in properly, which will seriously affect the screw-in quality. Utility Model Content

[0005] To address the aforementioned problems, this utility model designs a screwdriver bit with a quick-adjustable screw-in depth. It features an elastic adjustment structure with multi-step adjustment holes on the outside of the bushing, which can quickly adjust the height of the stop ring and fundamentally eliminate the phenomenon of stop ring loosening and displacement during operation, ensuring the consistency of screw screw-in depth.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A screwdriver bit with adjustable screw-in depth includes a bit body, a mounting hole at the head of the bit body for mounting the bit, a bushing fitted over the bit body, a stop ring at the top of the bushing, and a return spring between the bottom of the bushing and the bit body. The bushing is characterized by: the stop ring being mounted on the bushing via a quick-adjustment structure, which includes an adjustment ring fitted over the bushing; an elongated oblique hole on the side wall of the adjustment ring; and multiple stepped grooves of gradually decreasing height on the upper side of the elongated oblique hole. An elastic return structure is provided between the tail of the inner hole of the adjustment ring and the middle of the outer wall of the bushing, the return force generated by the elastic return structure causing the adjustment ring to always tend to move downwards relative to the bushing. A locking protrusion is provided on the side wall of the bushing, extending into the elongated oblique hole and engaging with one of the stepped grooves to achieve a stop.

[0008] More specifically, the aforementioned elastic reset structure includes a lower spring seat disposed at the bottom of the inner hole of the adjusting ring, an upper spring seat disposed in the middle of the outer wall of the bushing, and a compression spring disposed between the upper and lower spring seats. The compression spring has a pre-compression amount that causes the adjusting ring to always tend to move downward relative to the bushing.

[0009] More specifically, the outer wall of the aforementioned adjustment ring is provided with a textured surface to enhance frictional resistance.

[0010] More specifically, a connecting buckle is provided between the upper opening of the aforementioned adjusting ring and the tail of the stop ring.

[0011] More specifically, the top of the aforementioned stop ring is provided with a buffer rubber ring.

[0012] This screwdriver bit design utilizes the dynamic engagement of a locking protrusion on the bushing and a stepped groove on the adjusting ring to quickly adjust the height of the stop ring. In use, simply lift the adjusting ring to further compress the spring, causing the locking protrusion to disengage from the stepped groove. Then, rotate the adjusting ring clockwise or counterclockwise to the desired position and release it. The adjusting ring and stop ring will then spring back quickly under the restoring force of the compression spring, allowing the locking protrusion to enter the new stepped groove, thus completing the adjustment of the stop ring height.

[0013] The entire adjustment process of the above-mentioned stop ring height is very quick and easy to operate. Once the adjustment is completed, the adjustment ring and the stop ring will not loosen. This effectively ensures the consistency of the screw insertion depth and improves the quality of the gypsum board screw insertion operation. Attached Figure Description

[0014] Figure 1 A three-dimensional structural diagram of this utility model;

[0015] Figure 2 A front view of this utility model;

[0016] Figure 3 This utility model Figure 2 A cross-sectional view of the AA section;

[0017] Figure 4 An exploded three-dimensional structural diagram of this utility model.

[0018] Wherein, 1—bit body, 11—mounting hole, 12—connecting hole, 13—ball bearing, 2—bit, 21—connecting part, steel ball—22, 3—bulb, 31—large diameter section, 32—return spring, 33—engaging protrusion, 4—stop ring, 41—buffer ring, 5—adjusting ring, 51—slanted elongated hole, 511—stepped groove, 52—grid pattern, 53—connecting buckle, 6—elastic return structure, 61—lower spring seat, 62—upper spring seat, 63—compression spring. Detailed Implementation

[0019] like Figure 1-4 As shown, a screwdriver bit with adjustable screw-in depth includes a bit body 1, a mounting hole 11 at the head of the bit body 1, a bit 2 movably mounted in the mounting hole 11, and a hexahedral connecting part 21 at the tail of the bit 2.

[0020] The mounting hole 11 has several connecting holes 12 arranged circumferentially on its wall. In this illustration, three connecting holes 12 are provided and are evenly spaced along the circumference. In practice, the number of connecting holes 12 can be set to two, four or more as needed. Each connecting hole 12 is provided with a ball bearing 13, the diameter of which is larger than the length of the connecting hole 12.

[0021] A bushing 3 is fitted over the outside of the bit body 1. The inner hole of the bushing 3 has a large-diameter section 31 above the corresponding connecting hole 12 of the bit body. A return spring 32 is provided between the bottom of the bushing 3 and the bit body 1. Under the return force of the return spring 32, the bushing 3 always tends to move upwards. In the initial state, the inner wall of the bushing 3 presses against the ball bearing 13, causing the ball bearing 13 to move inwards into the mounting hole 11 and engage with the polyhedral connecting part 21 of the bit 2. This allows the bit body 1 and the bit 2 to rotate in linkage, enabling normal screw-in operation.

[0022] The bushing 3 is fitted with a stop ring 4 via a quick-adjustment structure. During operation, when the screwdriver bit 2 is screwed in against the stop ring 4 and against the plasterboard, as the screw is further tightened, the stop ring 4 and bushing 3 are compressed and moved backward, further compressing the return spring 32. Once the large-diameter section 31 of the bushing 3 aligns with the connecting hole 12 on the bit body 1, the ball bearing 13 in the connecting hole 12 will move outward due to the release of constraint. This outward movement of the ball bearing 13 will release the restriction on the tail of the bitdriver bit 2. At this point, the bitdriver bit 2 will rotate freely relative to the mounting hole 11 of the bit body 1, stopping the screwing operation. To improve the flexibility of the bitdriver bit 2's rotation relative to the mounting hole 11, a steel ball 22 is provided between the bottom of the bitdriver bit 2 and the bottom of the mounting hole.

[0023] In this figure, the quick adjustment structure includes an adjustment ring 5 disposed outside the bushing. An oblique elongated hole 51 is provided on the side wall of the adjustment ring 5, and a plurality of stepped grooves 511 with gradually decreasing height are provided on the upper side of the oblique elongated hole 51.

[0024] An elastic reset structure 6 is provided between the tail of the inner hole of the adjusting ring 5 and the middle of the outer wall of the bushing 3. The elastic reset structure 6 includes a lower spring seat 61 provided at the bottom of the inner hole of the adjusting ring 5, an upper spring seat 62 provided at the middle of the outer wall of the bushing 3, and a compression spring 63 provided between the upper and lower spring seats. The compression spring 63 has a pre-compression amount so that the adjusting ring 5 always has a downward tendency relative to the bushing 3.

[0025] The side wall of the bushing 3 is provided with a locking protrusion 33, which extends into the oblique elongated hole 51 and is locked into one of the stepped slots 511 to achieve the downward movement stop of the adjusting ring 5 relative to the bushing 3.

[0026] In summary, the screwdriver bit designed in this utility model utilizes the dynamic engagement between the engaging protrusion 33 on the bushing 3 and the multiple stepped grooves 511 on the adjusting ring 5 to quickly adjust the height of the stop ring 4. In use, simply lift the adjusting ring 5 and further press the compression spring 63 to disengage the engaging protrusion 33 from one of the stepped grooves 511. Then, rotate the adjusting ring 5 clockwise or counterclockwise to the desired adjustment position and release it. At this point, under the restoring force of the compression spring 63, the adjusting ring 5 and the stop ring 4 quickly spring back, causing the engaging protrusion 33 to enter a new stepped groove 511 after adjustment, completing one adjustment of the stop ring 4's height. The entire adjustment process is very fast, and once the adjustment is complete, the adjusting ring 5 and the stop ring 4 will not loosen, effectively ensuring the consistency of the screw insertion depth and improving the quality of screwing in drywall screws.

[0027] The outer wall of the adjustment ring 5 is provided with a textured surface 52 to enhance frictional resistance, thereby improving the finger pressure when operating the adjustment ring 5.

[0028] A connecting buckle 53 is provided between the upper opening of the adjusting ring 5 and the tail of the stop ring 4 to achieve the engagement and positioning of the two.

[0029] The top of the stop ring 4 is provided with a buffer rubber ring 41 to effectively reduce the impact of the stop ring 4 on the gypsum board surface during operation.

[0030] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the utility model. Any simple modifications, equivalent changes, or alterations made to the above embodiments based on the technical principles of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A screwdriver bit with adjustable screw-in depth, comprising a bit body (1), a mounting hole (11) at the head of the bit body (1) for mounting a bit (2), a bushing (3) sleeved on the outside of the bit body (1), a stop ring (4) at the top of the bushing (3), and a return spring (32) between the bottom of the bushing (3) and the bit body (1), characterized in that: The bushing (3) is fitted with the stop ring (4) via a quick-adjustment structure. The quick-adjustment structure includes an adjustment ring (5) located outside the bushing (3). An oblique elongated hole (51) is provided on the side wall of the adjustment ring (5). The upper side of the oblique elongated hole (51) is provided with multiple stepped grooves (511) with gradually decreasing heights. An elastic reset structure (6) is provided between the inner end of the adjustment ring (5) and the middle of the outer wall of the bushing (3). The reset force generated by the elastic reset structure (6) makes the adjustment ring (5) always tend to move downward relative to the bushing (3). A locking protrusion (33) is provided on the side wall of the bushing (3). The locking protrusion (33) extends into the oblique elongated hole (51) and locks into one of the stepped grooves (511) to achieve the stop.

2. A screwdriver bit with adjustable screw-in depth as described in claim 1, characterized in that: The elastic reset structure (6) includes a lower spring seat (61) disposed at the bottom of the inner hole of the adjusting ring (5), an upper spring seat (62) disposed in the middle of the outer wall of the bushing (3), and a compression spring (63) disposed between the upper and lower spring seats. The compression spring (63) has a pre-compression amount so that the adjusting ring (5) always tends to move downward relative to the bushing (3).

3. A screwdriver bit with adjustable screw-in depth as described in claim 1 or 2, characterized in that: The outer wall of the adjustment ring (5) is provided with a mesh pattern (52) to enhance friction resistance.

4. A screwdriver bit with adjustable screw-in depth as described in claim 1 or 2, characterized in that: A connecting buckle (53) is provided between the upper opening of the adjusting ring (5) and the tail of the stop ring (4).

5. A screwdriver bit with adjustable screw-in depth as described in claim 1 or 2, characterized in that: The top of the stop ring (4) is provided with a buffer rubber ring (41).

Images