CN217585546U - Tape measure capable of automatically decelerating tape strip retracting process - Google Patents
Tape measure capable of automatically decelerating tape strip retracting process Download PDFInfo
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- CN217585546U CN217585546U CN202221735613.6U CN202221735613U CN217585546U CN 217585546 U CN217585546 U CN 217585546U CN 202221735613 U CN202221735613 U CN 202221735613U CN 217585546 U CN217585546 U CN 217585546U
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Abstract
The utility model discloses a tape measure of process automatic deceleration is withdrawed to chi area, include: the measuring tape comprises a measuring tape shell, a measuring tape disc is arranged in the measuring tape shell, a measuring tape is wound on the outer surface of the measuring tape disc, the measuring tape extends out of the measuring tape shell from one end of the measuring tape shell through the measuring tape disc, a transmission mechanism used for driving the measuring tape disc to rotate is connected onto the measuring tape disc, a cam is arranged on the transmission mechanism, the top of the cam is connected with a disc, the cam and the disc are coaxially installed, a circular groove is formed in the surface of the disc, a cam groove is formed in the side surface of the convex part of the cam, and two ends of the cam groove are respectively communicated with the circular groove; the utility model discloses a can retrieve the in-process at the chi area and to chi area automatic deceleration, solve the tape measure use in the chi area retrieve speed too fast, have the potential safety hazard and to the problem of tape measure head shock damage, can guarantee the use efficiency of chi area in the stage of pulling out and retrieving simultaneously.
Description
Technical Field
The utility model relates to a tape measure of process automatic deceleration is withdrawed to tape measure belongs to tape measure technical field.
Background
Measuring tapes are common tools in daily life. The steel tape is commonly used for building and decoration and is one of necessary tools for families. Including fiber tape, lap tape, etc. The Luban ruler, the wind water gauge and Wen Gongche also belong to a steel measuring tape, and the measuring tape is widely applied to various fields such as life, production, engineering construction and the like due to the advantages of compact structure, small size, convenience in carrying, high use efficiency, capability of meeting the length measurement requirements of different scales in daily life and the like.
The tape measure is carrying out the in-process that the tape was withdrawed after the long distance measurement, because the inside clockwork spring of tape measure warp great drive tape measure and withdraws with higher speed, and the tape measure is drawn out length and is big more, withdraws speed big more, and thin and high-speed motion's tape measure is extremely sharp, can have the potential safety hazard to measurer and personnel on every side like this, and the tape measure head striking casing when withdrawing the end at a high speed in addition easily makes the deformation of tape measure head, not hard up or break up, and then reduces tape measure accuracy and shortens the life of tape measure.
SUMMERY OF THE UTILITY MODEL
For solving the defects of the prior art, the utility model aims to provide a tape measure with a tape retrieving process automatic deceleration, which solves the technical problems of safety and reliability caused by the overhigh speed of the tape measure in the tape retrieving process in the prior art.
In order to achieve the above object, the utility model adopts the following technical scheme:
a tape measure that automatically decelerates during tape retraction, comprising:
a tape housing having a tape reel disposed therein;
a tape is wound on the outer surface of the tape disc of the tape measure;
the tape extends out of the tape measure housing from one end of the tape measure housing through the tape measure disc;
the tape disc of the tape measure is connected with a transmission mechanism for driving rotation;
the transmission mechanism is provided with a cam, the top of the cam is connected with the disc, and the cam and the disc are coaxially arranged;
the surface of the disc is provided with a circular groove, the side surface of the convex part of the cam is provided with a cam groove, and two ends of the cam groove are respectively communicated with the circular groove;
the bottom of the cam is provided with a cam rod which is connected with a lever through a revolute pair, and the lever is elastically connected with the inner wall of the tape measure shell through a pressure spring;
when the tape is retracted, the top of the cam rod slides a distance along the circular groove and then slides into the cam groove.
As a preferred scheme of the utility model, the cam groove is divided into a lead groove, a cross groove and a cam arc groove;
the guide connecting groove is arranged at one end of the cam groove, the depth of the guide connecting groove is greater than that of the circular groove, and the guide connecting groove extends and is communicated with the circular groove;
the cross connecting groove is arranged at the other end of the cam groove, the depth of the cross connecting groove is smaller than that of the circular groove, and the cross connecting groove extends upwards to be connected with the circular groove;
the cam arc groove is arranged between the lead connecting groove and the connecting groove.
As a preferred scheme of the utility model, drive mechanism is including setting up in the reduction gear one of coaxial arrangement on tape measure chi dish, reduction gear one meshes and links to each other reduction gear two, reduction gear two meshes and links to each other reduction gear three, reduction gear three with the coaxial fixed connection of cam, reduction gear one, reduction gear two, reduction gear three all fix on the tape measure casing through axis of rotation separately.
As a preferred scheme of the utility model, the lever rotates and installs in the tape measure casing.
As a preferred scheme of the utility model, the one end that the cam pole was kept away from to the lever is connected with the friction and hinders the end.
As a preferred embodiment of the present invention, the tape measure housing is provided with a brake switch for fixing the tape when the tape measure is moved.
The utility model discloses the beneficial effect who reaches:
the utility model can automatically decelerate the tape in the tape recovery process, solves the problems of potential safety hazard and impact damage to the tape head caused by the excessively fast tape recovery speed in the tape use process, and can ensure the use efficiency of the tape in the pulling-out and recovery stages; when the ruler tape is specifically implemented, the upper end of the cam rod reversely moves along the circular groove in the retracting process, when the ruler tape is retracted to a set length, the upper end of the cam rod moves to the joint of the circular groove and the cam groove, then the upper end of the cam rod enters the cam groove along the track of the connecting groove, the cam rod is pressed to move downwards due to extrusion of the protruding part of the cam, so that the lever is driven to move, the friction end of the lever is tilted to contact the ruler tape, and friction deceleration of the retracted ruler tape is realized.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a left side view of the disk and cam structure of the present invention;
FIG. 4 is a right side view of the disk and cam arrangement of the present invention;
fig. 5 is a schematic diagram of the lever structure of the present invention.
The meaning of the reference symbols in the figures:
1. a tape measure housing; 2. a tape measure reel; 3. a tape; 4. a transmission mechanism; 41. a first reduction gear; 42. a second reduction gear; 43. a third reduction gear; 5. a disc; 51. a circular groove; 6. a cam; 61. a cam groove; 611. a lead groove is connected; 612. a cross-over groove; 613. a cam arc groove; 7. a cam lever; 8. a lever; 81. a spring; 82. a friction end; 9. and (5) a brake switch.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1-5 of the accompanying drawings, the utility model provides a tape measure with automatic deceleration during the tape 3 withdrawing process, which comprises: the measuring tape comprises a measuring tape shell 1, a measuring tape disc 2 is arranged in the measuring tape shell 1, a measuring tape 3 is wound on the outer surface of the measuring tape disc 2, the measuring tape 3 extends out of the measuring tape shell 1 from one end of the measuring tape shell 1 through the measuring tape disc 2, a transmission mechanism 4 used for driving rotation is connected to the measuring tape disc 2, a cam 6 is arranged on the transmission mechanism 4, the top of the cam 6 is connected with a disc 5, the cam 6 and the disc 5 are coaxially installed, a circular groove 51 is arranged on the surface of the disc 5, a cam groove 61 is formed in the side face of the protruding portion of the cam 6, two ends of the cam groove 61 are respectively communicated with the circular groove 51, a cam rod 7 is arranged at the bottom of the cam 6 and connected with the cam rod 7 in a rotating mode through a rotating pair and a lever 8, the lever 8 is elastically connected with the inner wall of the measuring tape shell 1 through a compression spring 81, and when the measuring tape 3 is retracted, the top of the cam rod 7 slides for a certain distance along the circular groove 51 and then slides into the cam groove 61;
the utility model can automatically decelerate the tape 3 in the process of recovering the tape 3, solves the problems that the tape 3 is recovered too fast in the use process of the tape measure, has potential safety hazard and damages the impact of the tape measure head, and can simultaneously ensure the use efficiency of the tape 3 in the pulling-out and recovering stages; during the specific implementation, the upper end of the cam rod 7 reversely moves along the circular groove 51 in the retraction process of the tape 3, when the tape 3 is retracted to a set length, the upper end of the cam rod 7 moves to the joint of the circular groove 51 and the cam groove 61, then the upper end of the cam rod 7 enters the cam groove 61 along the track of the guide groove 611, the cam rod 7 is pressed to move downwards due to the extrusion of the protruding part of the cam 6, so that the lever 8 is driven to move, the friction end 82 of the lever 8 is tilted to contact with the tape 3, and the friction deceleration of the retracted tape 3 is realized.
As a preferred embodiment of the present invention, the cam groove 61 is divided into a lead groove 611, a connecting groove 612, and a cam arc groove 613;
the lead connecting groove 611 is arranged at one end of the cam groove 61, the depth of the lead connecting groove 611 is greater than that of the circular groove 51, and the lead connecting groove 611 extends and is communicated with the circular groove 51;
the cross groove 612 is arranged at the other end of the cam groove 61, the depth of the cross groove 612 is smaller than that of the circular groove 51, and the cross groove 612 extends upwards to be connected with the circular groove 51;
the cam arc groove 613 is arranged between the lead groove 611 and the connecting groove 612;
when the tape 3 is retracted, the cam rod 7 slides in the circular groove 51, then slides into the cam arc groove 613 in the cam groove 61 along the butt groove, slides out along the cam arc groove 613, and slides into the circular groove 51 again through the cross groove 612, namely, the tape 3 is retracted.
Preferably, the transmission mechanism 4 includes a first reduction gear 41 coaxially mounted on the tape measure disc 2, the first reduction gear 41 is engaged and connected with a second reduction gear 42, the second reduction gear 42 is engaged and connected with a third reduction gear 43, the third reduction gear 43 is coaxially and fixedly connected with the cam 6, and the first reduction gear 41, the second reduction gear 42 and the third reduction gear 43 are all fixed on the tape measure housing 1 through respective rotating shafts;
the tape measure disc 2 rotates to drive the first reduction gear 41 to rotate synchronously, the first reduction gear 41 rotates to be meshed with the second reduction gear 42 to rotate, the second reduction gear 42 is meshed with the third reduction gear 43 to rotate, the third reduction gear 43 drives the cam 6 to rotate synchronously, the tape 3 can be reduced through the meshing rotation of the reduction gears, and when the tape 3 is pulled to the maximum length from the initial position, the cam 6 only rotates one circle correspondingly.
Preferably, the lever 8 is rotatably mounted within the tape measure housing 1.
The lever 8 rotates by taking a rotating shaft arranged in the tape measure shell 1 as a fulcrum, when the lever 8 is pressed by the cam rod 7, the friction end 82 tilts up to be in contact with the surface of the tape 3, and when the lever is not pressed, the friction end 82 moves downwards to be separated from the surface of the tape 3.
Preferably, one end of the lever 8 far away from the cam rod 7 is connected with a friction end 82;
the friction end 82 is provided on the upper surface of the end of the lever 8 and is made of a friction material.
Preferably, the tape measure housing 1 is provided with a brake switch 9 for fixing the tape 3 when moving;
the brake switch 9 can fix and lock the tape 3 pulled to the target measuring length position.
The utility model discloses the theory of operation:
referring to fig. 1-5 of the specification, the tape 3 is drawn out from the tape housing 1, the brake switch 9 is pressed after the tape 3 is drawn out to the target measurement length, after the measurement and recording are completed, the brake switch 9 is closed, the tape 3 is automatically and rapidly retracted under the drive of the spring inside the tape reel 2, the upper end of the cam rod 7 reversely moves along the circular groove 51 during the retraction, when the tape 3 is retracted to the set length, the upper end of the cam rod 7 moves to the place where the circular groove 51 meets the cam groove 61, the upper end of the cam rod 7 enters the cam groove 61 along the track of the joining groove 611, the cam rod 7 is pressed and moves downwards due to the extrusion of the convex part of the cam 6, the friction resistance end 82 of the lever 8 tilts up to contact the tape 3 and realizes friction deceleration, when the upper end of the cam rod 7 moves to the topmost end of the cam groove 61, then the cam rod 7 continues to move along the cam arc groove 613, and then continues to move out of the cam arc groove 613, then returns to the circular groove 51, and returns to the initial state, when the upper end of the tape 3 and the cam rod 7 returns to the initial state, the cam groove 51 returns to the initial state, and the circular groove 51 during the extension of the short tape.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
The above description is made for the exemplary purposes with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above embodiments, and various insubstantial improvements are made without improvement to the present invention, which is applicable to other applications.
Claims (6)
1. A tape measure that automatically decelerates during tape retraction, comprising:
a tape housing (1) in which a tape disc (2) is arranged;
a tape (3) is wound on the outer surface of the tape disc (2);
the tape (3) extends out of the tape casing (1) from one end of the tape casing (1) through the tape disc (2);
the tape disc (2) is connected with a transmission mechanism (4) for driving rotation;
a cam (6) is arranged on the transmission mechanism (4), the top of the cam (6) is connected with the disc (5), and the cam (6) and the disc (5) are coaxially arranged;
a circular groove (51) is formed in the surface of the disc (5), a cam groove (61) is formed in the side face of the protruding portion of the cam (6), and two ends of the cam groove (61) are respectively communicated with the circular groove (51);
the bottom of the cam (6) is provided with a cam rod (7) which is connected with the cam rod (7), the cam rod (7) is rotationally connected with a lever (8) through a revolute pair, and the lever (8) is elastically connected with the inner wall of the tape measure shell (1) through a pressure spring (81);
when the tape (3) is retracted, the top of the cam rod (7) slides a certain distance along the circular groove (51) and then enters the cam groove (61) to slide.
2. The tape measure of claim 1, wherein the cam groove (61) is divided into a tap groove (611), a cross groove (612), a cam arc groove (613);
the guide connecting groove (611) is arranged at one end of the cam groove (61), the depth of the guide connecting groove (611) is larger than that of the circular groove (51), and the guide connecting groove (611) extends and is communicated with the circular groove (51);
the cross groove (612) is arranged at the other end of the cam groove (61), the depth of the cross groove (612) is smaller than that of the circular groove (51), and the cross groove (612) extends upwards to be connected with the circular groove (51);
the cam arc groove (613) is arranged between the lead-in groove (611) and the connecting groove (612).
3. A tape measure for automatically reducing speed during tape retracting process according to claim 1, wherein the transmission mechanism (4) comprises a first reduction gear (41) coaxially mounted on the tape measure disc (2), the first reduction gear (41) is connected with a second reduction gear (42) in an engaged manner, the second reduction gear (42) is connected with a third reduction gear (43) in an engaged manner, the third reduction gear (43) is coaxially and fixedly connected with the cam (6), and the first reduction gear (41), the second reduction gear (42) and the third reduction gear (43) are all fixed on the tape measure housing (1) through respective rotating shafts.
4. A tape measure according to claim 1 in which the lever (8) is rotatably mounted in the tape measure housing (1).
5. A tape measure according to claim 1 in which the lever (8) remote from the cam lever (7) has a friction end (82) attached to it.
6. A tape measure with automatic deceleration during tape retraction according to claim 1, wherein the tape measure housing (1) is provided with a brake switch (9) for securing the tape (3) during movement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221735613.6U CN217585546U (en) | 2022-07-05 | 2022-07-05 | Tape measure capable of automatically decelerating tape strip retracting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221735613.6U CN217585546U (en) | 2022-07-05 | 2022-07-05 | Tape measure capable of automatically decelerating tape strip retracting process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217585546U true CN217585546U (en) | 2022-10-14 |
Family
ID=83534184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221735613.6U Active CN217585546U (en) | 2022-07-05 | 2022-07-05 | Tape measure capable of automatically decelerating tape strip retracting process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217585546U (en) |
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2022
- 2022-07-05 CN CN202221735613.6U patent/CN217585546U/en active Active
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