CN117647166A - Double-layer tape measure - Google Patents

Abstract

The application relates to a double-layer tape measure, wherein a handle driving shaft is arranged in the middle of one end face of a box body, a winding opening for the tape measure to pass through is formed in the side wall of the box body, a winding area is arranged in the middle of the box body, a transition area communicated with the winding area is arranged at the periphery of the winding area, and the winding opening is communicated with the transition area; the winding area is internally provided with a driven winding chamber, a winding transition chamber and a driving winding chamber from top to bottom in sequence; the bottom of the driving winding chamber is provided with a main driving mechanism, the main driving mechanism drives the driving plate and the main winding drum to synchronously rotate, the handle driving shaft passes through the main driving mechanism driven by the main winding drum, and the driven plate is driven by the main winding drum to synchronously rotate; an auxiliary winding mechanism is arranged at a position close to the winding opening in the transition area. The utility model can improve the defect that the maximum measurement size of the ruler is increased continuously, so that the radius size of the tape measure box body is increased.

Description

Double-layer tape measure

Technical Field

The present application relates to the field of tape measures, and in particular to a double layer tape measure.

Background

The measuring tape is a relatively common tool in our daily life. The common measuring tape in daily life also has different sizes and dimensions due to different use requirements.

At present, a common tape measure with longer measured size comprises a box body, wherein a handle driving shaft is arranged in the middle of one end face of the box body, the handle driving shaft stretches into the box body to drive a winding disc to work, and a winding opening for the tape measure to pass through is formed in the side wall of the box body.

With respect to the tape measure described above, the inventor believes that when the maximum size of the tape measure is small, the radius of the entire tape measure case is relatively small, but as the maximum size is larger, the radius of the entire tape measure case naturally needs to be increased continuously, and although the measurement can be achieved, the use of such large-sized tape measure is inconvenient for carrying, placing and measuring.

Disclosure of Invention

In order to improve the defect that the maximum measurement size of the ruler is increased continuously, so that the radius of the tape measure box body also has to be increased.

The application provides a double-deck tape measure adopts following technical scheme:

a double-layer tape measure comprises a box body, a handle driving shaft is arranged in the middle of one end surface of the box body, a winding opening for the tape measure to pass through is arranged on the side wall of the box body,

a rolling area is arranged in the middle of the box body, a transition area communicated with the rolling area is arranged at the periphery of the rolling area, and a rolling opening is communicated with the transition area;

the winding area is internally provided with a driven winding chamber, a winding transition chamber and a driving winding chamber from top to bottom in sequence;

the active winding chamber is internally provided with an active plate and a main winding drum, and the main winding drum is arranged on one side of the active plate, which faces the winding transition chamber;

the winding transition chamber is internally provided with a driven plate and a secondary winding drum, the secondary winding drum is arranged on one side of the driven plate far away from the driving winding chamber, and extends into the driven winding chamber from the upper end part of the secondary winding drum;

the bottom of the driving winding chamber is provided with a main driving mechanism, the main driving mechanism drives the driving plate and the main winding drum to synchronously rotate, the handle driving shaft passes through the main driving mechanism driven by the main winding drum, and the driven plate is driven by the main winding drum to synchronously rotate;

an auxiliary winding mechanism is arranged at a position close to the winding opening in the transition area.

Optionally, a rotating groove for the driving plate to rotate is formed in the bottom of the driving rolling chamber, the main driving mechanism is arranged at the bottom of the rotating groove, and the end face of the driving plate, which faces one side of the driven plate, is higher than the bottom surface of the driving rolling chamber; the driven plate is provided with a jack, and a bolt which can be inserted into the jack is arranged on the outer end face of the main winding drum.

Optionally, the main driving mechanism comprises a planetary gear mounting plate, an outer gear ring, a planetary gear set, a sun gear and a main driving sleeve,

the sun gear is arranged at one end of the main driving sleeve, which is far away from the driven winding chamber, and the main driving sleeve is sleeved on the periphery of the handle driving shaft and can axially move;

the planetary gear set comprises a plurality of planetary gears which are uniformly distributed around the circumference of the sun gear and meshed with the sun gear, and the planetary gears are all arranged on the planetary gear mounting plate; the planetary gear mounting plate is fixedly connected with the handle driving shaft;

the outer gear ring is arranged at the bottom of the rotating groove and is meshed with the planetary gear;

the main winding drum is sleeved on the periphery of the main driving sleeve, and a unidirectional driving assembly is arranged between the main winding drum and the main driving sleeve.

Optionally, the one-way drive assembly includes setting up in the round main ratchet of main drive cover outer terminal surface and the main round reel inner end face is provided with the round from the ratchet with main ratchet looks adaptation, is provided with the spring between the inner end face of main drive cover and the planetary gear mounting panel.

Optionally, the box body comprises an upper shell, a middle auxiliary shell and a lower shell which are arranged in a matching way from top to bottom,

the middle auxiliary shell comprises an annular shell and an inner supporting plate, the upper end and the lower end of the annular shell are matched with the upper shell and the lower shell, the winding opening is formed in the upper shell, the annular shell and the lower shell after matched installation, and the inner supporting plate is arranged on one side, close to the upper shell, of the annular shell;

the middle part of the inner supporting plate is provided with a through hole, and the inner supporting plate is sleeved on the periphery of the secondary winding drum through the through hole;

the initiative rolling chamber is located between driven plate and the lower casing, and the rolling transition room is located between interior backup pad and the initiative rolling chamber, and driven rolling chamber is located between interior backup pad and the last casing.

Optionally, the through-hole of interior backup pad extends to the edge of interior backup pad, and the edge of driven plate is provided with the transition breach, and one of them one side of transition breach department is provided with the arc deflector that the slope set up, is provided with the support baffle between the limit that limit corresponds in the arc of arc deflector and the transition breach, and the tip of support baffle is provided with elastic support and rises tight strip.

Optionally, a circle of separation coaming is arranged at the periphery of the winding area, a channel which is communicated with the transition area and the winding area is arranged at the position of the separation coaming corresponding to the auxiliary winding mechanism, and the auxiliary winding mechanism is arranged in the channel;

the auxiliary winding mechanism comprises a lifting component positioned at one side of the transition zone close to the winding opening, a wane component positioned at one side of the transition zone far away from the winding opening and a driven driving component positioned between the lifting component and the wane component, wherein the driven driving component drives the wane component to drive the lifting component to lift up and down;

and a guide plate connected with the separation coaming is arranged on one side of the lifting assembly, which is far away from the driven driving assembly, and the guide plate is connected with the inner wall of the lower shell at a position close to the winding opening.

Optionally, the lifting assembly comprises two guide rods arranged at one side of the guide plate at intervals and in parallel, a lifting support sleeved on the two guide rods in a sliding manner, and guide rollers arranged in the lifting support at intervals and in parallel, wherein the guide rollers are respectively sleeved on the corresponding guide rods in the lifting support in a sliding manner.

Optionally, the rocker assembly comprises a rocker bracket installed on one side far away from the guide plate and a rocker hinged to the top end of the rocker bracket;

a spring is arranged between the lower side of one end of the rocker, which is far away from the lifting bracket, and the lower shell, and the hinge joint position of the rocker and the rocker bracket is arranged at one side close to the spring;

one side of the seesaw, which is close to the lifting support, is provided with a thrust rod, one side of the lifting support, which corresponds to the thrust rod, is provided with a sliding seat, one side of the sliding seat, which faces the thrust rod, is provided with a strip-shaped groove, and the end part of the thrust rod can be inserted into the strip-shaped groove.

Optionally, the driven driving assembly comprises spring supports respectively arranged at corresponding positions of the upper shell and the lower shell, a rotating roller arranged between the two spring supports, and an auxiliary force application sleeve;

the opposite end surfaces of the two spring supports are provided with spring mounting grooves, the mounting shafts at the upper end and the lower end of the rotating roller are respectively rotatably mounted on one side, close to the winding area, of the corresponding spring mounting groove, springs are respectively mounted in the spring mounting grooves, one ends of the springs are propped against the mounting shafts, and the other ends of the springs are propped against the inner walls of the corresponding upper shell and the lower shell;

the side wall of the rotating roller is spirally provided with a spiral driving groove from bottom to top, and a sliding pin which can slide in the spiral driving groove is arranged on a rocker between the lifting bracket and the rocker bracket;

the auxiliary force application sleeve is sleeved on the mounting shaft at the lower end of the rotating roller in a sliding manner, a circle of main ratchet teeth are arranged on the top end surface of the auxiliary force application sleeve, and a circle of auxiliary ratchet teeth matched with the main ratchet teeth are arranged on the lower end surface of the rotating roller;

a spring is arranged between the auxiliary force application sleeve and the corresponding spring support;

and the side, close to the winding opening, of the spring support in the upper shell and the lower shell is provided with grid coaming plates.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through setting up rolling district and transition district to set up driven rolling room, rolling transition room, initiative rolling room in the rolling district, and set up main actuating mechanism and supplementary rolling mechanism, make ruler biggest measurement size constantly increase, the tape measure box body also has to increase the defect of radius size along with it and obviously improve, make the ruler of same biggest measurement size, the tape measure box body that uses does not need to increase the radius size in traditional tape measure box body relatively, and the size of tape measure box body is about half of traditional tape measure box body moreover.

2. By designing the unidirectional driving assembly in the main driving mechanism, normal winding operation can be ensured during winding, and when unreeling, the main winding drum and the auxiliary winding drum can be normally unreeled without influencing the main driving mechanism.

3. The box body is divided into an upper shell, a middle auxiliary shell and a lower shell, so that production, processing, installation and combination are facilitated, meanwhile, the middle auxiliary shell can be utilized to facilitate the winding of the main winding drum, and the tape measure can be continuously transferred into the driven winding chamber to be continuously wound through the winding transition chamber, so that double-layer winding is formed.

4. The ruler to be rolled up can be smoothly guided to the secondary winding drum by the arc-shaped guide plate to be rolled up, and the ruler which is already rolled up on the primary winding drum cannot be affected.

5. By utilizing the auxiliary winding mechanism, the ruler which is smoothly to be wound into after the main winding drum is fully wound is too high, so that the ruler can conveniently and quickly enter the driven winding chamber through the arc-shaped guide plate and be wound onto the auxiliary winding drum.

Drawings

FIG. 1 is a schematic view of the overall structure of a dual layer tape measure according to an embodiment of the present application.

Fig. 2 is an exploded view of a dual layer tape measure according to an embodiment of the present application.

FIG. 3 is a schematic cross-sectional view of a dual layer tape measure according to an embodiment of the present application.

FIG. 4 is a schematic view of the structure of an upper housing of a dual layer tape measure according to an embodiment of the present application.

Fig. 5 is a schematic view of a structure of a double-layer tape measure for showing a driven plate, and a secondary winding drum according to an embodiment of the present application.

Fig. 6 is a schematic view of a structure for showing the inside of the lower case in a double-layer tape measure according to an embodiment of the present application.

Fig. 7 is a partially enlarged schematic view of the portion a in fig. 6.

Fig. 8 is a schematic view of a dual layer tape measure for showing a lifting assembly in accordance with an embodiment of the present application.

Reference numerals illustrate: 1. a handle drive shaft; 2. a winding opening; 3. a driven winding chamber; 4. a rolling transition chamber; 5. an active winding chamber; 6. an upper housing; 7. a middle auxiliary shell; 8. a lower housing; 9. an annular housing; 10. an inner support plate; 11. an active plate; 12. a main winding drum; 13. a driven plate; 14. a slave winding drum; 15. a through hole; 16. a rotating groove; 17. a plug pin; 18. a planetary gear mounting plate; 19. an outer ring gear; 20. a planetary gear; 21. a sun gear; 22. a main driving sleeve; 23. a main ratchet; 24. a slave ratchet; 25. a spring; 26. a guide plate; 27. a guide rod; 28. a lifting bracket; 29. a guide roller; 30. a rocker bracket; 31. a seesaw; 32. a thrust rod; 33. a sliding seat; 34. a bar-shaped groove; 35. a spring support; 36. a rotating roller; 37. an auxiliary force application sleeve; 38. a mounting shaft; 39. a screw driving groove; 40. a sliding pin; 41. separating coaming; 42. blocking coaming; 43. a transition gap; 44. an arc-shaped guide plate; 45. a supporting partition; 46. and the elastic support tensioning strip.

Detailed Description

The present application is described in further detail below in conjunction with figures 1 to 8.

The embodiment of the application discloses a double-layer tape measure. Referring to fig. 1 to 3, the portable measuring tape box comprises a box body, wherein a handle driving shaft 1 is arranged in the middle of one end face of the box body, a winding opening 2 for a measuring tape to pass through is formed in the side wall of the box body, a winding area is arranged in the middle of the box body, a transition area communicated with the winding area is arranged at the periphery of the winding area, and the winding opening 2 is communicated with the transition area; a driven rolling chamber 3, a rolling transition chamber 4 and a driving rolling chamber 5 are sequentially arranged in the rolling area from top to bottom; referring to fig. 4 and 5, the box body comprises an upper shell 6, a middle auxiliary shell 7 and a lower shell 8 which are installed in a matched mode from top to bottom, the middle auxiliary shell 7 comprises an annular shell 9 and an inner supporting plate 10, the upper end and the lower end of the annular shell 9 are installed in a matched mode with the upper shell 6 and the lower shell 8, the winding opening 2 is formed in the upper shell 6, the annular shell 9 and the lower shell 8 after being installed in a matched mode, the inner supporting plate 10 is arranged on one side, close to the upper shell 6, of the annular shell 9, and the inner supporting plate 10 is mainly used for bearing a tape wound in the driven winding chamber 3.

The active winding chamber 5 is internally provided with an active plate 11 and a main winding drum 12, and the main winding drum 12 is arranged on one side of the active plate 11 facing the winding transition chamber 4; the winding transition chamber 4 is internally provided with a driven plate 13 and a secondary winding drum 14, the secondary winding drum 14 is arranged on one side of the driven plate 13 far away from the driving winding chamber 5, and extends into the driven winding chamber 3 from the upper end part of the secondary winding drum 14; under the design of the middle auxiliary shell 7, the driving winding chamber 5 is positioned between the driven plate 13 and the lower shell 8, the winding transition chamber 4 is positioned between the inner support plate 10 and the driving winding chamber 5, the driven winding chamber 3 is positioned between the inner support plate 10 and the upper shell 6, and the winding transition chamber 4 does not wind itself and only transits the tape measure from the driving winding chamber 5 to the driven winding chamber 3; the middle part of the inner support plate 10 is provided with a through hole 15, and the inner support plate 10 is sleeved on the periphery of the secondary winding drum 14 through the through hole 15.

The bottom of the driving winding chamber 5 is provided with a rotating groove 16 for the driving plate 11 to rotate, the bottom of the rotating groove 16 is provided with a main driving mechanism, the main driving mechanism can drive the driving plate 11 and the main winding drum 12 to synchronously rotate, the handle driving shaft 1 passes through the auxiliary winding drum 14 to drive the main driving mechanism to work, the driven plate 13 is driven by the main winding drum 12 to synchronously rotate, because the box body is assembled in a split mode, the driven plate 13 is provided with a jack, the outer end face of the main winding drum 12 is provided with a plug pin 17 which can be inserted into the jack, so that the driving plate and the main winding drum are conveniently matched with each other to be installed, and in addition, in order that friction and interaction cannot be generated between the main winding drum 12 and the lower shell 8 in winding, the end face of the driving plate 11, which faces one side of the driven plate 13, can be higher than the bottom face of the driving winding chamber 5.

In this embodiment, the main driving mechanism includes a planetary gear mounting plate 18, an outer gear ring 19, a planetary gear 20 set, a sun gear 21, and a main driving sleeve 22, where the sun gear 21 is disposed at one end of the main driving sleeve 22 far away from the driven winding chamber 3, and the main driving sleeve 22 is sleeved on the periphery of the handle driving shaft 1 and can move axially; the planetary gear 20 group comprises a plurality of planetary gears 20, generally three planetary gears 20 are arranged, and certainly, the planetary gears 20 can be appropriately increased or decreased according to actual needs, are uniformly distributed around the circumference of the sun gear 21 and meshed with the sun gear 21, and the planetary gears 20 are all arranged on the planetary gear mounting plate 18; the planetary gear mounting plate 18 is fixedly connected with the handle driving shaft 1; the outer gear ring 19 is arranged at the bottom of the rotary groove 16, and the outer gear ring 19 is meshed with the planetary gears 20; in this embodiment, the bottom of the rotary groove 16 may be perforated, then a bottom cover is installed, the inner ring of the bottom cover is designed with a ring gear as the outer ring gear 19, and the planetary gear 20 set is located in the inner space of the bottom cover and engaged with the outer ring gear 19, and it should be noted that, no matter how the structures of the outer ring gear 19, the planetary gear 20 set and the sun gear 21 are changed, the main purpose is to achieve the matching relationship between the three.

In order to realize that the main winding drum 12 can be driven to rotate by the handle driving shaft 1 when being wound, and in the unwinding process, the rotation of the main winding drum 12 can not drive the handle driving shaft 1 to rotate in a following way, so that the convenience and safety of use are improved, the limbs of a user are prevented from being damaged by the handle, the main winding drum 12 can be sleeved on the periphery of the main driving sleeve 22, a unidirectional driving assembly is arranged between the main winding drum 12 and the main driving sleeve 22, wherein the unidirectional driving assembly comprises a circle of main ratchet teeth 23 arranged on the outer end surface of the main driving sleeve 22, a circle of auxiliary ratchet teeth 24 matched with the main ratchet teeth 23 are arranged on the inner end surface of the main winding drum 12, a spring 25 is arranged between the inner end surface of the main driving sleeve 22 and the planetary gear mounting plate 18, and the main ratchet teeth 23 and the auxiliary ratchet teeth 24 are matched, so that the main winding drum 12 can not drive the main driving sleeve 22 to rotate in a unidirectional locking matching manner when the main winding drum 12 rotates in the reverse direction, namely in the unwinding process.

Referring to fig. 6 to 8, in the present embodiment, an auxiliary winding mechanism is disposed at a position near the winding opening 2 in the transition region, and the auxiliary winding mechanism includes a lifting component located at a side near the winding opening 2 in the transition region, a rocker 31 component located at a side far away from the winding opening 2, and a driven driving component located between the lifting component and the rocker 31 component, where the driven driving component drives the rocker 31 component to drive the lifting component to lift up and down; the side of the lifting assembly, which is far away from the driven driving assembly, is also provided with a guide plate 26 connected with a separation coaming 41, and the guide plate 26 is connected with the inner wall of the lower shell 8 at a position close to the winding opening 2.

The lifting assembly comprises two guide rods 27 arranged on one side of the guide plate 26 at intervals and in parallel, a lifting bracket 28 sleeved on the two guide rods 27 in a sliding manner, and guide rollers 29 arranged in the lifting bracket 28 at intervals and in parallel, wherein the guide rollers 29 are respectively sleeved on the corresponding guide rods 27 in the lifting bracket 28 in a sliding manner, and the tape passes through the winding opening 2 and then passes between the two guide rollers 29, so that after the design, the guide rollers 29 axially move along with the lifting bracket 28 on the guide rods 27, and meanwhile, the tape also follows the lifting of the lifting bracket 28 after passing between the two guide rollers 29.

The rocker 31 assembly comprises a rocker bracket 30 arranged on one side far away from the guide plate 26 and a rocker 31 hinged to the top end of the rocker bracket 30; a spring 25 is arranged between the lower side of one end of the rocker 31 far away from the lifting bracket 28 and the lower shell 8, and the hinge position of the rocker 31 and the rocker bracket 30 is arranged at one side close to the spring 25; the rocker 31 is provided with a thrust rod 32 near one side of the lifting support 28, one side of the lifting support 28 corresponding to the thrust rod 32 is provided with a sliding seat 33, one side of the sliding seat 33 facing the thrust rod 32 is provided with a bar groove 34, the end part of the thrust rod 32 can be inserted into the bar groove, the thrust rod 32 should have a certain movable space in the bar groove, and the thrust rod 32 moves in an arc under the driving of the rocker 31, so that the bar groove can ensure that the thrust rod 32 has a certain small-amplitude tilting motion and a certain movable space.

The driven driving assembly comprises spring supports 35, a rotating roller 36 and an auxiliary force application sleeve 37, wherein the spring supports 35 are respectively arranged at corresponding positions of the upper shell 6 and the lower shell 8, and the rotating roller 36 is arranged between the two spring supports 35; the opposite end surfaces of the two spring supports 35 are provided with spring 25 mounting grooves, mounting shafts 38 at the upper end and the lower end of the rotating roller 36 are respectively rotatably mounted on one side, close to the winding area, of the corresponding spring 25 mounting groove, springs 25 are respectively mounted in the spring 25 mounting grooves, one end of each spring 25 is propped against the mounting shaft 38, and the other end is propped against the inner walls of the corresponding upper shell 6 and lower shell 8, so that the rotating roller 36 can be always close to the winding area; the side wall of the rotating roller 36 is spirally provided with a spiral driving groove 39 from bottom to top, a sliding pin 40 capable of sliding in the spiral driving groove 39 is arranged on the rocker 31 between the lifting bracket 28 and the rocker bracket 30, and when the rotating roller 36 rotates, the sliding pin 40 can rotate and slide upwards or downwards in the spiral driving groove 39; the auxiliary force application sleeve 37 is sleeved on a mounting shaft 38 at the lower end of the rotating roller 36 in a sliding manner, a circle of main ratchet teeth 23 are arranged on the top end surface of the auxiliary force application sleeve 37, and a circle of auxiliary ratchet teeth 24 matched with the main ratchet teeth 23 are arranged on the lower end surface of the rotating roller 36; a spring 25 is provided between the auxiliary urging sleeve 37 and the corresponding spring mount 35.

In the embodiment, a circle of separation coaming 41 is arranged at the periphery of the winding area, a channel for communicating the transition area and the winding area is arranged at the position of the separation coaming 41 corresponding to the auxiliary winding mechanism, and the auxiliary winding mechanism is arranged in the channel; in addition, the side of the spring support 35 in the upper shell 6 and the lower shell 8, which is close to the winding opening 2, is provided with the check coaming 42, the check coaming 42 can prevent the tape from loosening when passing through the position, the work of the auxiliary winding mechanism is affected or unnecessary use faults are caused, the through opening 15 of the inner support plate 10 extends to the edge of the inner support plate 10, the edge of the driven plate 13 is provided with the transition notch 43, one edge of the transition notch 43 is provided with the arc-shaped guide plate 44 which is obliquely arranged, the support partition plate 45 is arranged between the arc-shaped inner edge of the arc-shaped guide plate 44 and the edge corresponding to the transition notch, the end part of the support partition plate 45 is provided with the elastic support tensioning strip 46, and the elastic support tensioning strip 46 can always ensure the smooth passing through the tape passing through the position, can not generate curling or torsional deformation, and can be more smoothly guided into the driven winding chamber 3.

The embodiment of the application discloses a double-deck tape measure's theory of operation is: when the winding is needed, the handle is rotated clockwise, the handle drives the handle driving shaft 1 to rotate, and then the main driving mechanism is driven to work, namely, the planetary gear 20 group rotates along with the planetary gear mounting plate 18, the planetary gear 20 group rotates along with the outer gear ring 19 and the sun gear 21, the outer gear ring 19 is fixed, the sun gear 21 rotates and simultaneously the main driving sleeve 22 synchronously rotates along with the outer gear ring, and as the spring 25 is arranged between the inner end surface of the main driving sleeve 22 and the planetary gear mounting plate 18, when the main driving sleeve 22 rotates clockwise, a circle of main ratchet teeth 23 on the outer end surface of the main driving sleeve 22 and a circle of slave ratchet teeth 24 arranged on the inner end surface of the main winding drum 12 are in a mutually clamped state, so that the main winding drum 12 synchronously rotates along with the main winding drum 12, and then the main winding drum 12 is driven to start winding, and meanwhile, the lifting bracket 28 is positioned at a position close to one side of the lower shell 8, and when the main winding chamber 5 is fully wound, namely, when the outermost part of the tape wound on the main winding drum 12 contacts with the outer wall of the auxiliary force application sleeve 37 and rotates, the auxiliary force application sleeve 37 drives the auxiliary force application sleeve 37 to rotate in the opposite direction of the main winding drum 12 under the action of rolling friction under the action of the tape wound on the main winding drum 12, the spring 25 is arranged between the auxiliary force application sleeve 37 and the corresponding spring support 35, when the main driving sleeve 22 rotates anticlockwise, a circle of main ratchet 23 on the top end surface of the auxiliary force application sleeve 37 and a circle of auxiliary ratchet 24 on the lower end surface of the rotating roller 36 are in a mutually clamped state, at the moment, the rotating roller 36 rotates anticlockwise, when the rotating roller 36 rotates, the sliding pin 40 rotates upwards in the spiral driving groove 39 along with the rotating roller 36, so as to drive the rocker 31 to displace upwards, the thrust rod 32 at the end part of the rocker 31 drives the sliding seat 33 to displace upwards, so that the lifting bracket 28 synchronously displaces upwards, the tape between the guide rollers 29 is guided in the driven winding chamber 3 upwards, and in the upward displacement process of the lifting bracket 28, the tape can smoothly enter the driven winding chamber 3 after being guided by the arc-shaped guide plate 44, and after entering the driven winding chamber 3, the tape starts to be wound on the driven winding drum continuously, otherwise, the driven winding chamber 3 is firstly unwound and then the tape enters the driving winding chamber 5 during unwinding.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (10)

1. The double-layer tape measure comprises a box body, a handle driving shaft (1) is arranged in the middle of one end surface of the box body, a winding opening (2) for the tape measure to pass through is arranged on the side wall of the box body, the double-layer tape measure is characterized in that,

a rolling area is arranged in the middle of the box body, a transition area communicated with the rolling area is arranged at the periphery of the rolling area, and a rolling opening (2) is communicated with the transition area;

a driven rolling chamber (3), a rolling transition chamber (4) and a driving rolling chamber (5) are sequentially arranged in the rolling area from top to bottom;

an active plate (11) and a main winding drum (12) are arranged in the active winding chamber (5), and the main winding drum (12) is arranged on one side of the active plate (11) facing the winding transition chamber (4);

the winding transition chamber (4) is internally provided with a driven plate (13) and a secondary winding drum (14), the secondary winding drum (14) is arranged on one side of the driven plate (13) far away from the driving winding chamber (5), and extends into the driven winding chamber (3) from the upper end part of the secondary winding drum (14);

the bottom of the driving winding chamber (5) is provided with a main driving mechanism, the main driving mechanism drives the driving plate (11) and the main winding drum (12) to synchronously rotate, the handle driving shaft (1) passes through the auxiliary winding drum (14) to drive the main driving mechanism to work, and the driven plate (13) is driven by the main winding drum (12) to synchronously rotate;

an auxiliary winding mechanism is arranged at a position close to the winding opening (2) in the transition area.

2. The double-layer tape measure according to claim 1, wherein a rotating groove (16) for rotating the driving plate (11) is formed in the bottom of the driving winding chamber (5), the main driving mechanism is arranged at the bottom of the rotating groove (16), and the end face of the driving plate (11) facing the driven plate (13) is higher than the bottom face of the driving winding chamber (5); the driven plate (13) is provided with a jack, and a bolt (17) which can be inserted into the jack is arranged on the outer end surface of the main winding drum (12).

3. A double-layer tape measure according to claim 2, wherein the primary drive mechanism comprises a planetary gear mounting plate (18), an outer gear ring (19), a set of planetary gears (20), a sun gear (21), a primary drive sleeve (22),

the sun gear (21) is arranged at one end of the main driving sleeve (22) far away from the driven winding chamber (3), and the main driving sleeve (22) is sleeved on the periphery of the handle driving shaft (1) and can axially move;

the planetary gear (20) group comprises a plurality of planetary gears (20), the planetary gears (20) are uniformly distributed around the circumference of the sun gear (21) and meshed with the sun gear (21), and the planetary gears (20) are all arranged on the planetary gear mounting plate (18); the planetary gear mounting plate (18) is fixedly connected with the handle driving shaft (1);

the outer gear ring (19) is arranged at the bottom of the rotary groove (16) and the outer gear ring (19) is meshed with the planetary gear (20);

the main winding drum (12) is sleeved on the periphery of the main driving sleeve (22), and a unidirectional driving assembly is arranged between the main winding drum (12) and the main driving sleeve (22).

4. A double-layer tape measure according to claim 3, wherein the unidirectional drive assembly comprises a primary ratchet (23) provided on an outer end face of the primary drive sleeve (22), and a secondary ratchet (24) provided on an inner end face of the primary winding drum (12) to be fitted with the primary ratchet (23), a spring (25) being provided between the inner end face of the primary drive sleeve (22) and the planetary gear mounting plate (18).

5. A double-layer tape measure according to claim 1, wherein the case comprises an upper housing (6), a middle auxiliary housing (7), and a lower housing (8) mounted in a top-to-bottom fit,

the middle auxiliary shell (7) comprises an annular shell (9) and an inner supporting plate (10), the upper end and the lower end of the annular shell (9) are matched with the upper shell (6) and the lower shell (8), the winding opening (2) is formed in the matched upper shell (6), the annular shell (9) and the lower shell (8), and the inner supporting plate (10) is arranged on one side, close to the upper shell (6), of the annular shell (9);

the middle part of the inner supporting plate (10) is provided with a through hole (15), and the inner supporting plate (10) is sleeved on the periphery of the secondary winding drum (14) through the through hole (15);

the driving winding chamber (5) is positioned between the driven plate (13) and the lower shell (8), the winding transition chamber (4) is positioned between the inner supporting plate (10) and the driving winding chamber (5), and the driven winding chamber (3) is positioned between the inner supporting plate (10) and the upper shell (6).

6. The double-layer tape measure according to claim 5, wherein the through hole (15) of the inner support plate (10) extends to the edge of the inner support plate (10), a transition notch (43) is formed in the edge of the driven plate (13), an arc-shaped guide plate (44) which is obliquely arranged is arranged at one edge of the transition notch (43), a support partition plate (45) is arranged between the arc-shaped inner edge of the arc-shaped guide plate (44) and the edge corresponding to the transition notch, and an elastic support tensioning strip (46) is arranged at the end part of the support partition plate (45).

7. The double-layer tape measure according to claim 1, wherein a circle of separating coaming (41) is arranged at the periphery of the winding area, a channel for communicating the transition area and the winding area is arranged at the position of the separating coaming (41) corresponding to the auxiliary winding mechanism, and the auxiliary winding mechanism is arranged in the channel;

the auxiliary winding mechanism comprises a lifting component positioned at one side of the transition zone close to the winding opening (2), a rocker (31) component positioned at one side of the transition zone far away from the winding opening (2) and a driven driving component positioned between the lifting component and the rocker (31) component, wherein the driven driving component drives the rocker (31) component to drive the lifting component to lift up and down;

and a guide plate (26) connected with the separation coaming (41) is arranged on one side of the lifting assembly away from the driven driving assembly, and the guide plate (26) is connected with the inner wall of the lower shell (8) at a position close to the winding opening (2).

8. The double-layer tape measure according to claim 7, wherein the lifting assembly comprises two guide rods (27) arranged on one side of the guide plate (26) at intervals and in parallel, a lifting support (28) sleeved on the two guide rods (27) in a sliding manner, and guide rollers (29) arranged in the lifting support (28) at intervals and in parallel, wherein the guide rollers (29) are respectively sleeved on the corresponding guide rods (27) in the lifting support (28) in a sliding manner.

9. A double-layer tape measure according to claim 8, wherein the paddle (31) assembly comprises a paddle holder (30) mounted on a side remote from the guide plate (26), the paddle (31) being hinged to the top end of the paddle holder (30);

a spring (25) is arranged between the lower side of one end of the rocker (31) far away from the lifting bracket (28) and the lower shell (8), and the hinge joint position of the rocker (31) and the rocker bracket (30) is arranged at one side close to the spring (25);

one side that wane (31) is close to lifting support (28) is provided with distance rod (32), and lifting support (28) are provided with sliding seat (33) with one side that distance rod (32) corresponds, and one side that sliding seat (33) orientation distance rod (32) is provided with bar groove (34), and the tip of distance rod (32) can insert in the bar groove.

10. A double-layer tape measure according to claim 9, wherein the driven drive assembly comprises spring holders (35) respectively provided at corresponding positions of the upper case (6) and the lower case (8), a rotating roller (36) provided between the two spring holders (35), and an auxiliary urging sleeve (37);

the opposite end surfaces of the two spring supports (35) are provided with spring (25) mounting grooves, mounting shafts (38) at the upper end and the lower end of the rotating roller (36) are respectively rotatably mounted on one side, close to a winding area, of the corresponding spring (25) mounting groove, the springs (25) are respectively mounted in the spring (25) mounting grooves, one ends of the springs (25) are propped against the mounting shafts (38), and the other ends of the springs are propped against the inner walls of the corresponding upper shell (6) and the lower shell (8);

a spiral driving groove (39) is spirally arranged on the side wall of the rotating roller (36) from bottom to top, and a sliding pin (40) capable of sliding in the spiral driving groove (39) is arranged on a rocker (31) between the lifting bracket (28) and the rocker bracket (30);

the auxiliary force application sleeve (37) is sleeved on a mounting shaft (38) at the lower end of the rotating roller (36) in a sliding manner, a circle of main ratchet teeth (23) are arranged on the top end surface of the auxiliary force application sleeve (37), and a circle of auxiliary ratchet teeth (24) matched with the main ratchet teeth (23) are arranged on the lower end surface of the rotating roller (36);

a spring (25) is arranged between the auxiliary force application sleeve (37) and the corresponding spring support (35);

and grid coaming plates (42) are arranged on one sides of the spring supports (35) in the upper shell (6) and the lower shell (8) close to the winding opening (2).