CN203928924U - Self-locking tape measure - Google Patents

Abstract

The utility model discloses a self-locking tape measure, which belongs to a measuring tool. The existing automatic positioning tape tape presses the tape tape on the tape box to realize positioning on one side. The scale on the surface of the belt is also easy to wear. The position near the opening in the shell of the utility model is provided with a movable frame, a locking block, and a locking spring. and the pressing part, the locking block is set to move in the up and down direction relative to the tape, the locking block is provided with a locking part and a pressure slope, and the locking part and the supporting part are respectively located on the upper side of the tape , the lower side, the elastic force of the locking spring is applied to the movable frame to force the pressure part to be pressed and held on the pressure inclined surface, so that the locking part and the supporting part clamp and lock the tape from the upper and lower sides of the tape at the same time, so that The scale belt is evenly stressed and not easily damaged and deformed, which also improves the clamping efficiency, reduces the wear of the locking block and the scale belt, and delays the scale wear on the surface of the scale belt.

Description

Self-locking tape measure

technical field

The utility model belongs to measuring tools, in particular to a self-locking tape measure.

Background technique

The common tape measure cannot be locked by itself after the tape is pulled out of the casing, and needs to be locked manually to prevent the tape from being accidentally drawn into the casing, which is troublesome to operate.

The Chinese utility model patent with the authorized notification number CN2767951Y discloses the technical solution of "a tape measure with automatic positioning of the tape", which includes a tape box, a tape set in it and wound on a hub, and a stop block , a spring and a button set through the ruler box; wherein, the stop block is pivotally connected to the position adjacent to the mouth of the ruler box in the ruler box, and is located on the ruler tape; the spring is also located in the position adjacent to the mouth of the ruler box in the ruler box, and The head of the stop is held deflected toward the tape until it engages the tape; the inboard end of the button abuts the stop and the button, when depressed, drives the stop away from the tape.

The Chinese invention patent application with the publication number CN 101187539A discloses a "tape measure with automatic positioning of the ruler tape", which includes a ruler box and a ruler tape, a button set through the ruler box, an elastic reset part that provides reset power to the button, and a button that can be driven. Rotating rotating rod, the bottom end of the rotating rod is pivotally connected with a braking wheel, the braking wheel is located on the scale belt, and an inclined plane is arranged on the rear side of the braking wheel, the inclined plane is tilted forward towards the braking wheel, and the bottom of the rotating rod The end can be deflected backward towards the tape until the brake wheel is in contact with the tape and the inclined surface.

The above two schemes, in order to realize the automatic positioning of the ruler tape, are all realized by pressing the ruler tape on the ruler box, and the ruler box is always static. When positioning the ruler tape, only rely on stoppers or stoppers One side of the driving wheel (from the front of the tape) presses the tape on the tape box, resulting in the tape being easily damaged due to uneven force, and the stopper (stopper or brake wheel) wears out quickly, reducing the service life , The scale on the surface of the tape is also easy to wear, which affects the use.

Utility model content

The technical problem to be solved and the technical task proposed by the utility model are to overcome the defect caused by pressing the tape on the tape box to realize positioning on one side of the existing tape automatic positioning tape, and to provide a tape that can be positioned from the top and bottom of the tape. Self-locking measuring tape with tape locking on both sides.

In order to achieve the purpose of the present utility model, the self-locking tape measure of the present utility model includes a casing, a core assembly, a tape, and an unlocking member. The casing has an opening, and the core assembly is assembled on the In the shell, the tape is passed through the opening, the outer end of the tape is provided with a hook and is located outside the shell, and the inner end of the tape is connected to the core assembly and is wound on the core assembly by the elastic force of the core assembly, the unlocking part is assembled on the shell with its outer end outside the shell and its inner end inside the shell , which is characterized by:

A movable frame, a locking block, and a locking spring are arranged at a position adjacent to the opening in the shell, and the movable frame is set to move along the length direction of the ruler tape at this position, and a supporting frame is set on the described movable frame. part and a pressing part, the locking block is set to move in the up and down direction relative to the tape at this part, the locking block is provided with a locking part and a pressure slope, and the locking The part and the supporting part are respectively located on the upper side and the lower side of the tape, and the elastic force of the locking spring is applied to the movable frame to make the pressing part press and hold on the pressure receiving slope The locking part and the supporting part are clamped and locked from the upper and lower sides of the tape at the same time, and the inner end of the unlocking part is located on one side of the movable frame for operating the unlocking part. The pressure exerting part pushes away from the pressure receiving slope.

As an optimal technical means: the two side walls of the housing are provided with corresponding transverse movable grooves, and the movable frame is placed in the corresponding transverse movable grooves.

As a preferred technical means: the locking block is reversibly assembled on the two side walls of the housing through a pin shaft. In particular, the two side walls of the casing are provided with corresponding vertical movable slots with upper and lower movable spaces, and the pin shafts are located in the vertical movable slots.

As a preferred technical means: the movable frame has a piercing hole, the lower hole wall of the piercing hole forms the supporting part, and the upper hole wall of the piercing hole forms the pressure applying part, The locking block extends into the piercing hole, and the tape passes through the piercing hole. Further, the movable frame and the locking block are separately provided with positioning guide grooves and positioning guide ribs that cooperate with each other. The positioning and guiding ribs are located on the upper hole wall of the piercing hole, and the positioning and guiding grooves are located in the middle of the pressure-receiving slope. The side wall of the through hole constrains the locking block in the through hole. The locking block protrudes into the through hole from inside to outside.

As an optimal technical means: the pressure slope of the locking block gradually decreases from the inside to the outside.

As a preferred technical means: the pressing portion on the movable frame is an inclined plane consistent with the pressing inclined plane.

As an optimal technical means: the shell is formed by butting two shells.

As a preferred technical means: the unlocking member is a rod and is assembled on the side wall of the housing through a pin shaft in the middle.

As a preferred technical means: the locking spring is supported between the housing and the movable frame.

The utility model arranges a movable frame, a locking block, and a locking spring at the opening in the shell, so that the locking part of the locking block and the supporting part of the movable frame are respectively located on the upper side and the lower side of the tape, and the movable frame Relying on the elastic force of the locking spring, the pressing part of the movable frame is pressed and held on the pressure inclined surface, so that the locking part and the supporting part are clamped and locked from the upper and lower sides of the tape to realize positioning. In the process of tightening the positioning, the locking part and the supporting part are movable parts, which can adaptively adjust the clamping force on the tape. The tape is evenly stressed and not easy to be damaged and deformed. The tape retracts into the shell more The clamping and locking positioning can be realized in a short distance, which improves the clamping efficiency, reduces the wear of the locking block and the tape, prolongs the service life of the locking block, and delays the wear of the scale on the tape surface.

Description of drawings

Fig. 1 is a structural representation of a self-locking tape measure of the present invention in a self-locking state;

Fig. 2 is a structural schematic diagram of the structure shown in Fig. 1 in an unlocked state;

Fig. 3 is the enlarged schematic diagram of the structure of part A in Fig. 1;

Fig. 4 is an enlarged schematic diagram of the structure of part B in Fig. 2;

Fig. 5 is a schematic diagram of the assembly relationship of the structure shown in Fig. 1;

Fig. 6 is the structural representation of the middle movable frame of structure shown in Fig. 1;

Fig. 7 is a structural schematic diagram of the middle locking block of the structure shown in Fig. 1;

Fig. 8 is a structural schematic diagram of a housing in the structure shown in Fig. 1;

Explanation of symbols in the figure:

01-Shell

11-opening, 12-housing, 13-transverse movable groove, 14-vertical movable groove, 15-housing;

02-foot tape

21 - hook;

03-Unlock piece

31-pin shaft;

04-Mobile frame

41-supporting part, 42-pressing part, 43-perforated hole, 44-positioning guide rib;

05-Lock block

51-locking part, 52-pressure inclined surface, 53-pin shaft, 54-positioning guide groove;

06-Locking spring;

07-Chip core assembly.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

The self-locking tape measure of the present utility model, as shown in Figure 1-5, comprises a housing 01, a core assembly 07, a tape 02, and an unlocking member 03. The housing 01 has an opening 11, and the core assembly 07 is assembled in the housing 01. The tape 02 is passed through the opening 11, the outer end of the tape 02 is provided with a hook 21 and is located outside the casing 01, the inner end of the tape 02 is connected to the core assembly 07 and is pushed toward the core by the elastic force of the core assembly. Winding on the assembly, the unlocking part 03 is assembled on the casing 01 with its outer end outside the casing and its inner end inside the casing. A movable frame 04, a locking block 05, a locking The spring 06 and the movable frame 04 are set to move along the length direction of the tape at this position (the left and right directions shown in Figure 1-4), and the movable frame 04 is provided with a supporting part 41 and a pressing part 42 (see Figure 6), The locking block 05 is set to move relative to the tape in the up and down direction of this part (the up and down direction is the direction of the upper surface and the lower surface of the tape), and the locking block 05 is provided with a locking part 51 and a pressure slope 52 (See Figure 7), the locking part 51 and the supporting part 41 are respectively located on the upper side and the lower side of the ruler tape 02 (the upper side is the side of the upper surface of the ruler tape, as shown in Figure 1-4 is the upper side of the ruler tape side, the upper side is the side of the lower surface of the tape, the side below the tape is shown in Fig. Hold on the pressure-receiving slope 52, rely on the cooperation of the pressure-applying part 42 and the pressure-receiving slope 52 to make the locking part 51 and the supporting part 41 clamp and lock the ruler tape from the upper and lower sides of the ruler tape 02 at the same time (Fig. 1, 3 ), the inner end of the unlocking member 03 is located on one side of the movable frame 04 for pushing the pressing portion 42 away from the pressure receiving slope 52 when the unlocking member is operated.

When you want to pull out the ruler belt, just pull the ruler belt outwards. When the pulling force overcomes the elastic force of the locking spring, the movable frame 04 will move toward the opening 11 (to the left as shown in Figure 1-4) driven by the ruler belt. The movement of the small range reduces the pressure of the pressure applying part 42 on the pressure inclined surface 52, and the locking part 51 of the locking block 05 and the supporting part 41 of the movable frame 04 are released from clamping and locking of the tape, and the tape is clamped and locked. The strap can be easily pulled out.

When the measuring tape is pulled to the required length and loosened, the movable frame 04 moves into the housing 01 (to the right as shown in Figure 1-4) under the action of the elastic force of the locking spring 06, so that the pressing part 42 is pressed on the On the pressure-receiving slope 52, relying on the cooperation of the pressure-applying part 42 and the pressure-receiving slope 52, the locking part 51 and the supporting part 41 clamp and lock the ruler tape from the upper and lower sides of the ruler tape to realize positioning (Fig. 1, 3 State shown), forming a self-lock, so that the tape will not retract into the shell due to the elastic force of the core assembly.

When you want to retract the pulled-out tape back into the shell, operate the unlocking part 03 by hand, so that the inner end of the unlocking part 03 pushes the pressure applying part 42 away from the pressure inclined surface 52 (see Fig. 2 and Fig. 4, the movable frame is pushed to the left The clamping and locking of the tape by the locking part 51 of the locking block 05 and the supporting part 41 of the movable frame 04 is released, and the tape can be wound on the core under the elastic force of the core assembly component was withdrawn.

During the action process of clamping and locking to realize positioning, the locking part and the supporting part can be movable, and the clamping force on the ruler tape can be adjusted adaptively. The force on the ruler tape is even and it is not easy to be damaged and deformed. The clamping and locking positioning can be realized with a shorter distance into the housing, which improves the clamping efficiency, reduces the wear of the locking block and the tape, prolongs the service life of the locking block, and delays the wear of the scale on the tape surface.

As a structural form to realize the movement of the movable frame relative to the length direction of the tape, the two side walls of the housing 01 are provided with corresponding transverse movable grooves 13 (see Figure 8), and the movable frame 04 is placed in the corresponding transverse movable grooves 13 Inside. The structure ensures the assembly position of the movable frame while ensuring the activity of the movable frame.

As a structural form for realizing the locking block moving up and down relative to the ruler tape, the locking block 05 is reversibly assembled on the two side walls of the housing 01 through the pin shaft 53, and the locking block is rotated relative to the pin shaft to realize the relative movement of the locking block. The tape moves up and down. In particular, the two side walls of the casing 01 are provided with corresponding vertical movable grooves 14 (see FIG. 8 ) with upper and lower movable spaces. As shown in FIG. In the vertical movable groove 14, the movement of the locking block is realized through the movement of the pin shaft 53 in the vertical movable groove 14 . When the unlocking part is operated by hand to retract the pulled tape into the casing, the retracted tape in the casing can push the locking block upwards, so that the contact force between the locking block and the tape nearly disappears, and the tape can be Under the elastic force of the core assembly, it is wound on the core assembly and retracted.

In order to promote the movable frame and the locking block to clamp and lock the ruler tape reliably and flexibly to realize positioning, the movable frame 04 has a piercing hole 43, and the lower hole wall of the piercing hole 43 forms a supporting part 41, and the hole wall of the piercing hole 43 The upper hole wall forms a pressure part 42 (see Figure 6), the locking block 05 extends into the piercing hole 43, and the tape 02 passes through the piercing hole 43, where the lower surface of the tape 02 faces the supporting part 41 , The upper surface of the tape 02 faces the locking part 51 . In order to make the pressing part and the pressure receiving slope accurately aligned during the action (especially during the process of the pressure applying part and the pressure receiving slope from being separated from each other to being in contact with each other), the movable frame 04 and the locking block 05 are separately provided with mutual cooperation The positioning guide groove 54 and the positioning guide rib 44 . Specifically, in order to make the structure compact, the positioning guide rib 44 is located on the upper hole wall of the through hole 43 (see FIG. 6 ), and the positioning guide groove 54 is located in the middle of the pressure inclined surface 52 (see FIG. 7 ). Further, the side walls of the piercing hole 43 constrain the locking block 05 in the piercing hole to prevent the locking block from shaking toward the two side walls of the casing. In terms of positional relationship, the locking block 05 extends into the through hole 43 from inside to outside (ie from the inner position of the housing to the opening of the housing).

Specifically, the pressure-receiving slope 52 of the locking block 05 is gradually lowered from the inside to the outside (ie, from the inner position of the housing to the opening of the housing).

In order to make the movable frame 04 coordinate with the locking block 05 and evenly clamp the tape, the pressing part 42 on the movable frame 04 is an inclined plane consistent with the pressure inclined surface 52 .

In order to facilitate assembly, the shell 01 is formed by butting two shells 12 and 15 .

For easy operation, the unlocking part 03 is a rod and is assembled on the side wall of the casing through the pin shaft 31 in the middle, so it can be pushed along the outline of the casing 01 to the lower left in Fig. 1 and 2 during operation. The unlocking part 03 is tilted to realize unlocking. As an equivalent means, other structures capable of pushing the movable frame to move to the left, such as mechanical transmission components, are acceptable.

The locking spring 06 is supported between the casing 01 and the movable frame 04. The locking spring shown in the figure is a helical pressure spring, and it can also be other forms of elastic elements such as leaf springs during specific implementation.

Claims (14)

1. self-locking tape measure, comprise shell (01), chi core assembly (07), chi band (02), unlock piece (03), described shell (01) has opening (11), described chi core assembly (07) is assemblied in described shell (01), described chi band (02) is located in described opening (11), the outer end of described chi band (02) is provided with hook (21) and is positioned at outside described shell (01), the inner of described chi band (02) is connected to described chi core assembly (07) above and is reeled on chi core assembly by the elastic force of described chi core assembly, described unlock piece (03) is assemblied in described shell (01) above and its outer end is positioned at outside described shell (01), within its inner is positioned at described shell (01), it is characterized in that:

In described shell (01), close on the position of described opening (11) and establish tressel (04), latch segment (05), locking spring (06), described tressel (04) is made as the length direction activity at this position along described chi band (02), on described tressel (04), establish supporting part (41) and the portion that exerts pressure (42), described latch segment (05) is made as the above-below direction activity at this position with respect to described chi band (02), described latch segment (05) is provided with lock part (51) and pressurized inclined-plane (52), described lock part (51), supporting part (41) lays respectively at the upside of described chi band (02), downside, the elastic force of described locking spring (06) is applied on described tressel (04) and impels the described portion that exerts pressure (42) pressure holding above to make described lock part (51) on described pressurized inclined-plane (52), supporting part (41) clamps locking from the upper and lower surface of chi band (02) to chi band simultaneously, the side that the inner of described unlock piece (03) is positioned at described tressel (04) pushes away described pressurized inclined-plane (52) by the described portion that exerts pressure (42) when operating unlock piece.

2. self-locking tape measure according to claim 1, is characterized in that: the two side of described shell (01) is provided with corresponding horizontal loose slot (13), and described tressel (04) is placed in the horizontal loose slot (13) of described correspondence.

3. self-locking tape measure according to claim 1, is characterized in that: described latch segment (05) is by the turnover two side that is assemblied in described shell (01) of bearing pin (53).

4. self-locking tape measure according to claim 3, is characterized in that: the two side of described shell (01) is provided with the corresponding vertical loose slot (14) with upper and lower activity space, and described bearing pin (53) is positioned at described vertical loose slot (14).

5. self-locking tape measure according to claim 1, it is characterized in that: described tressel (04) has a perforating (43), the lower hole wall of described perforating (43) forms described supporting part (41), the upper hole wall of described perforating (43) forms the described portion that exerts pressure (42), described latch segment (05) stretches into described perforating (43), and described chi band (02) passes in described perforating (43).

6. self-locking tape measure according to claim 5, is characterized in that: on described tressel (04) and latch segment (05), set up the positioning and guiding groove (54) and the positioning and guiding muscle (44) that cooperatively interact separately.

7. self-locking tape measure according to claim 6, is characterized in that: described positioning and guiding muscle (44) is positioned at the upper hole wall of described perforating (43), and described positioning and guiding groove (54) is positioned at the centre on described pressurized inclined-plane (52).

8. self-locking tape measure according to claim 5, is characterized in that: the sidewall of described perforating (43) constrains in described latch segment (05) in described perforating (43).

9. self-locking tape measure according to claim 5, is characterized in that: described latch segment (05) stretches into described perforating (43) from inside to outside.

10. self-locking tape measure according to claim 1, is characterized in that: the pressurized inclined-plane (52) of described latch segment (05) reduces from inside to outside gradually.

11. self-locking tape measures according to claim 1, is characterized in that: the portion that exerts pressure (42) on described tressel (04) is the inclined-plane consistent with described pressurized inclined-plane (52).

12. self-locking tape measures according to claim 1, is characterized in that: described shell (01) is formed by two housings (12,15) docking.

13. self-locking tape measures according to claim 1, is characterized in that: described unlock piece (03) is assemblied on the sidewall of described shell (01) for rod member and by the bearing pin (31) at its middle part.

14. self-locking tape measures according to claim 1, is characterized in that: described locking spring (06) is supported between described shell (01) and tressel (04).