Measuring tape capable of preventing tape band from cutting hands

Abstract

The utility model discloses a measuring tape capable of preventing a tape from cutting a hand, which belongs to measuring tools, aims to solve the problem that the existing cut-preventing measuring tape is complicated in structure and operation and high in cost, and comprises a shell, a reel, a tape, a hook assembly, an elastic element and a protective sleeve, the hook assembly is connected with the outer end part of the ruler belt through a rivet to form a hook belt rivet assembly; the protective sleeve comprises a clamping device, an anti-falling convex part and a sleeve body; the protective sleeve is installed in the shell outlet hole and movably connected with the shell outlet hole. The protective sleeve is in clamping connection with the hook belt rivet assembly; and when the anti-falling convex part slides to the outlet hole of the shell, the protective sleeve stays at the outlet hole of the shell, so that a safe distance is reserved between a hand and the tape, and the hand can be effectively prevented from being cut.

Description

Technical Field

[0001] The utility model relates to the field of measuring tools, in particular to a measuring tape capable of preventing the tape from cutting hands, which is used to prevent the edge of the tape from cutting fingers when the measuring tape is used. Background Art

[0002] As a widely used measuring tool in daily life, the tape measure is usually made of metal or non-metallic materials with a certain degree of elasticity. When not in use, the tape is wound inside the housing to keep it neat and easy to carry. When measuring, the user fixes the end of the tape to one end of the object to be measured and pulls the tape out of the housing to measure the length.

[0003] However, existing measuring tapes have safety hazards when extending or retracting the tape. Specifically, when the tape is quickly retracted into the housing or extended from the housing, due to its certain elasticity and the hardness of metal or non-metal materials, the edge of the tape may pass through the operator's hand at a relatively fast speed or the hook assembly of the tape may bounce onto the operator's hand at a fast speed, thereby causing the risk of cuts and injuries. This safety hazard not only brings psychological pressure to the operator, but may also cause direct harm to the operator.

[0004] Although there are some patent solutions for anti-cutting tape measures, such as the patent with announcement number CN209181654U, most of these patents remain in the theoretical stage due to complex structure and operation, high cost, complex process assembly or other reasons. Few practical products have been launched and are not suitable for large-scale market launch and production. Therefore, it is of great significance to develop an anti-cutting tape measure with high safety factor, environmental protection, economical and practical, and convenient to use to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a new type of tape measure that can prevent the tape from cutting hands, aiming to overcome the shortcomings of the prior art and provide a tape measure solution that is highly safe and easy to operate to prevent cuts, effectively improve the safety of the tape measure, and at the same time facilitate user use, improve measurement efficiency, and reduce costs.

[0006] In order to achieve the above-mentioned object, the utility model of the tape measure for preventing the tape from cutting hands comprises:

[0007] a housing, wherein the housing is provided with a housing outlet hole;

[0008] a reel, the reel being rotatably mounted in the housing;

[0009] A tape ruler, the tape ruler being wound around the reel, the tape ruler being configured to switch between a storage state and a use state, the tape ruler being wound into the housing in the storage state, and the tape ruler extending out of the housing through the housing outlet in the use state;

[0010] A hook assembly, wherein the hook assembly is connected to the outer end of the tape through a rivet to form a hook-strip rivet assembly;

[0011] A protective sleeve, which is movably mounted at the outlet hole of the shell and is constrained by the shell, and includes a clamping device;

[0012] In the process of retracting the measuring tape into the shell to transform the measuring tape from the use state to the storage state, the hook-and-belt rivet assembly and the locking device are locked into a locking connector to connect the protective cover and the hook-and-belt rivet assembly together, and the protective cover is brought into the shell by the locking connector; in the process of extending the measuring tape out of the shell to transform the measuring tape from the storage state to the use state, the protective cover is brought out of the shell outlet hole by the locking connector and is constrained and retained at the shell outlet hole to play a protective role, and the hook-and-belt rivet assembly is disengaged from the locking device to allow the measuring tape to extend freely.

[0013] In some embodiments, the hook-and-strip rivet assembly is provided with a first clamping structure, and the first clamping structure is one of the protective sleeve I convex part, the protective sleeve II convex part, the protective sleeve III convex part, the protective sleeve I concave part, the protective sleeve hole hook, the protective sleeve side hook or the protective sleeve IV convex part, the protective sleeve V convex part and the protective sleeve II concave part;

[0014] The clamping device is provided with a second clamping structure, which is one of the upper convex part of the rivet, the lower convex part of the rivet, the concave part of the ruler hook I, the convex part of the ruler hook II, the ruler hook hole, the ruler hook edge, the edge of the hook ruler belt head, the ruler hook concave part and the ruler hook III convex part;

[0015] The engagement of the hook-and-belt rivet assembly with the engagement device is achieved by the engagement of the first engagement structure with the second engagement structure, and the first engagement structure with the second engagement structure is engaged in any of the following ways:

[0016] The convex part of the protective sleeve I is snap-connected with the convex part on the rivet;

[0017] The convex part of the protective sleeve II is snap-connected with the lower convex part of the rivet;

[0018] The convex part of the protective cover III is snap-connected with the concave part of the ruler hook I;

[0019] The concave part of the protective cover I is snap-connected with the convex part of the ruler hook II;

[0020] The protective sleeve hole hook is snap-connected with the ruler hook hole;

[0021] The side hook of the protective sleeve is connected with the side hook of the ruler by snapping;

[0022] The protruding portion IV of the protective cover is snap-connected with the edge of the hook tape head;

[0023] The convex part of the protective cover V is engaged and connected with the concave part of the ruler hook;

[0024] The concave portion of the protective cover II is snap-connected with the convex portion of the ruler hook III.

[0025] In some embodiments, the protective sleeve is configured to have at least one of the following specifications and sizes:

[0026] (1) The diameter of the shell outlet hole is 0.1 mm to 8 mm larger than the outer diameter of the protective sleeve;

[0027] (2) The inner diameter of the protective sleeve is 0.1 mm to 8 mm larger than the diameter of the curved surface of the tape;

[0028] (3) The wall thickness of the protective sleeve is 0.2mm-3mm.

[0029] In some embodiments, the side of the protective cover corresponding to the tape scale is transparent or at least partially open.

[0030] In some embodiments, the protective cover is provided with an anti-slip protrusion, and a shell anti-slip portion is provided inside the shell. The anti-slip protrusion is configured to move along the positioning mechanism toward the shell outlet hole. When the anti-slip protrusion contacts the shell anti-slip portion, the protective cover can rotate at least 5 degrees with the anti-slip protrusion as the rotation axis. The rotation of the protective cover prevents the tape from being retracted and positions the tape at a desired length.

[0031] In some embodiments, the protective sleeve is blocked by at least one of the following blocking methods:

[0032] Blocking method 1: the protective sleeve is provided with an anti-slip convex portion, and a shell blocking mechanism is provided inside the shell. The shell blocking mechanism cooperates with the anti-slip convex portion. When the protective sleeve is fully retracted into the shell, the shell blocking mechanism will effectively support the anti-slip convex portion.

[0033] Blocking method two, the protective sleeve is provided with a protective sleeve blocking mechanism, and the protective sleeve blocking mechanism cooperates with the shell outlet hole. When the protective sleeve enters the deepest part of the shell, the shell outlet hole will support the protective sleeve blocking mechanism of the protective sleeve.

[0034] In some embodiments, the shell is provided with a positioning mechanism, and the protective sleeve is provided with an anti-slip protrusion, and the anti-slip protrusion slides within the range guided and limited by the positioning mechanism.

[0035] In some embodiments, an anti-retraction structure is provided between the housing and the protective sleeve, and the anti-retraction structure is at least one of the following anti-retraction structures:

[0036] The first anti-retreat structure: the positioning mechanism is provided with a shell anti-retreat mechanism, and the shell anti-retreat mechanism cooperates with the anti-slip convex part. When the protective sleeve moves outward from the shell to the shell outlet hole, the anti-slip convex part enters the shell anti-retreat mechanism. When the ruler tape is rolled into the shell, the blocking force generated by the anti-slip convex part entering the shell anti-retreat mechanism is greater than the friction force generated by the ruler tape and the protective sleeve when the ruler tape is rolled up, so the protective sleeve is stopped at the shell outlet hole; and the blocking force generated by the anti-slip convex part entering the shell anti-retreat mechanism is less than the impact force generated by the hook-belt rivet assembly and the protective sleeve when the ruler tape is rolled up, and the protective sleeve is smoothly retracted into the shell after being reconnected with the hook-belt rivet assembly.

[0037] The second anti-retreat structure is that the shell outlet hole is provided with an outlet hole convex part, and the protective sleeve is provided with a protective sleeve anti-retreat convex part. The outlet hole convex part cooperates with the protective sleeve anti-retreat convex part. When the protective sleeve moves out of the shell to the shell outlet hole, the protective sleeve anti-retreat convex part slides over the outlet hole convex part. When the tape is retracted, the blocking force of the outlet hole convex part on the anti-retreat convex part of the protective sleeve is greater than the friction force generated by the tape and the protective sleeve when the tape is retracted, so the protective sleeve is stopped at the shell outlet hole to play a protective role. The blocking force generated by the anti-detachment convex part entering the shell anti-retreat mechanism is less than the impact force generated by the hook-belt rivet assembly and the protective sleeve when the tape is retracted. After the protective sleeve and the hook-belt rivet assembly are reconnected together, they are smoothly retracted into the shell.

[0038] In some embodiments, the protective sleeve is provided with a notch, and the notch opens upward.

[0039] In some embodiments, the protective sleeve is provided with a ruler hook groove to facilitate the lower protrusion of the rivet to enter the protective sleeve without hindrance.

[0040] In some embodiments, the tape measure further includes an elastic element, which may be configured to apply an elastic force to the reel for winding or reeling the tape.

[0041] Other features and advantages of the utility model will be described in detail in the specific embodiments, and according to the description, some of these features and advantages will be clear and certain to those skilled in the art, or some of these features and advantages will be recognized by implementing the written description of the utility model and the embodiments described in the claims and the drawings. It should be understood that the above summary description and the following detailed description are illustrative.

[0042] The utility model includes accompanying drawings to provide further understanding, and the accompanying drawings are included in and constitute a part of this specification. The accompanying drawings, together with the description, are used to explain the principles and operations of various embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1It is a schematic diagram of the tape measure of the utility model for preventing the tape from cutting hands when the tape is partially stretched;

[0044] Figure 2 It is a schematic diagram of the tape portion of the tape measure for preventing the tape from cutting hands of the utility model when the tape portion is in a rolled-up state;

[0045] Figure 3 It is a cross-sectional schematic diagram of the engagement connection between the convex portion of the protective sleeve I and the convex portion of the rivet of the utility model;

[0046] Figure 4 It is a cross-sectional schematic diagram of the engagement connection between the protrusion of the protective sleeve II and the lower protrusion of the rivet according to another exemplary embodiment of the utility model;

[0047] Figure 5 It is a cross-sectional schematic diagram of the engagement connection between the convex portion of the protective cover III and the convex portion of the ruler hook I according to another exemplary embodiment of the utility model;

[0048] Figure 6 It is a cross-sectional schematic diagram of the engagement connection between the concave portion of the protective cover I and the convex portion of the ruler hook II according to another exemplary embodiment of the utility model;

[0049] Figure 7 It is a schematic diagram of the engagement connection between the protective sleeve hole hook and the ruler hook hole according to another exemplary embodiment of the utility model;

[0050] Figure 8 It is a schematic diagram of the engagement connection between the edge hook of the protective sleeve and the edge hook of the ruler according to another exemplary embodiment of the utility model;

[0051] Fig. 9 It is a cross-sectional schematic diagram of the engagement connection between the protruding portion IV of the protective cover and the edge of the hook ruler tape head according to another exemplary embodiment of the utility model;

[0052] Fig.10 It is a cross-sectional schematic diagram of the engagement connection between the convex portion of the protective cover V and the concave portion of the ruler hook according to another exemplary embodiment of the utility model;

[0053] Fig.11 It is a schematic diagram of the engagement connection between the concave portion of the protective cover II and the convex portion of the ruler hook III according to another exemplary embodiment of the utility model;

[0054] Fig.12 It is a schematic diagram of the diameter of the shell outlet hole of the utility model;

[0055] Fig.13 It is a schematic diagram of the inner diameter of the protective cover of the utility model;

[0056] Fig.14 This is a schematic diagram of the wall thickness of the protective sleeve of the utility model;

[0057] Fig.15 It is a schematic diagram of the rotation angle of the protective cover of the utility model;

[0058] Fig.16 A schematic cross-sectional view of a blocking method between the housing and the protective sleeve of the utility model;

[0059] Fig.17 It is a cross-sectional schematic diagram of another blocking method between the housing and the protective sleeve according to another exemplary embodiment of the utility model;

[0060] Fig.18 It is a schematic diagram of the housing positioning mechanism of the utility model;

[0061] Fig.19 This is a schematic diagram of a shell and a protective sleeve cooperating in an anti-retraction manner of the utility model;

[0062] Fig. 20 It is a schematic diagram of another anti-retraction mode of the housing and the protective sleeve according to another exemplary embodiment of the utility model;

[0063] Fig.21 It is a schematic cross-sectional view of the notch of the protective cover of the utility model;

[0064] Fig. 22 It is a cross-sectional schematic diagram of the ruler hook groove of the protective cover of the utility model;

[0065] Fig.23 It is a cross-sectional schematic diagram of the hook-and-belt rivet assembly of the utility model;

[0066] Fig.24 It is a cross-sectional schematic diagram of the protective cover of the utility model;

[0067] Fig.25 It is a schematic diagram of the protective cover of the utility model;

[0068] Fig.26 It is a schematic diagram of preventing the protective sleeve from being separated from the shell when the shell anti-separation part contacts the anti-separation convex part of the utility model. DETAILED DESCRIPTION

[0069] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0070] The terms "including" and "having" and any variations thereof in the specification and claims of the present utility model are intended to cover non-exclusive inclusions. For example, a method or product comprising a series of technical features is not necessarily limited to those technical features clearly listed, but may also include other technical features that are not clearly listed and can be included in the method or product.

[0071] The present invention is described in detail below in conjunction with specific embodiments and drawings.

[0072] Reference Figure 1 to Figure 2 , shows a tape measure with a sliding protective cover according to an exemplary embodiment to prevent the tape from cutting hands. The structure includes: a housing 1, a reel 2, a tape measure 3, a hook assembly 4, an elastic element 5 and a protective cover 6.

[0073] The housing 1 is provided with a housing outlet hole 11, a housing anti-detachment portion 12, a shaft 13 and a positioning mechanism 14. The reel 2 is rotatably mounted in the housing 1 around the shaft 13. The tape 3 is wound around the reel 2. The hook assembly 4 is connected to the outer end of the tape 3 by a rivet to form a hook-band rivet assembly 41. Fig.23 The structure of each part of the hook belt rivet assembly 41 is shown. The elastic element 5 is a planar spiral spring, which is at least partially positioned in the internal reel cavity, and the elastic element 5 is at least partially surrounded by the tape 3 in the radial direction. The elastic element 5 is connected between the reel 2 and the shaft 13, so that: when the tape 3 is unwound from the reel to extend from the housing 1, the elastic element 5 stores energy, and the elastic element 5 that releases energy drives the tape 3 to be rewound onto the reel.

[0074] The protective sleeve 6 comprises: a locking device 61, an anti-dropping protrusion 62 and a sleeve body 63. The protective sleeve 6 is installed in the shell outlet hole 11 and is movably connected to the shell outlet hole 11. Fig.24 The structure of each part of the protective sleeve 6 is shown. Preferably, the outer diameter of the protective sleeve 6 is smaller than the diameter 111 of the shell outlet 11, preferably 1 mm smaller. The inner diameter 699 of the protective sleeve 6 is larger than the diameter 300 of the curved surface of the tape 3, preferably 1 mm larger. Fig.25 The inner and outer diameters of the protective sleeve 6 are shown.

[0075] In the initial state (storage state), the tape 3 is completely wound on the reel 2, and the protective cover 6 is installed in the shell outlet hole 11. When measurement is required, the user pulls the hook assembly 4 to extend the tape 3 out of the shell 1. In the process of the tape 3 extending out of the shell 1, the elastic element 5 stores energy; at the same time, the snap-fit ​​connection between the hook-band rivet assembly 41 and the protective cover 6 leaves the shell 1. When the anti-slip protrusion 62 contacts the shell anti-slip portion 12, the snap-fit ​​connection is separated, and the protective cover 6 remains at the shell outlet hole 11, so that the extended tape 3 will not cut the user's fingers. Fig.26The state (use state) when the anti-slip protrusion 62 contacts the anti-slip part 12 of the housing, the protective cover 6 stays at the housing outlet hole 11, and the tape 3 is extended out is shown. Accordingly, the tape 3 is configured to switch between a storage state and a use state, in which the tape is rolled into the housing in the storage state and the tape 3 extends out of the housing 1 through the housing outlet hole 11 in the use state.

[0076] After completing the measurement, the user releases the hook assembly 4 , and the elastic element 5 releases energy, driving the tape 3 to be rewound onto the reel 2 .

[0077] Although the illustrated structure shows an embodiment in which the tape is pulled outward and the elastic element 5 stores energy to retract the tape into the housing, in other embodiments, the tape can be retracted into the housing by manually rotating the reel, and the elastic element is configured to store energy to push the tape out of the housing when the tape is retracted into the housing. The manual rotation of the reel can be achieved by configuring a crank exposed outside the housing on the reel. Moreover, in another embodiment, the elastic element can be omitted. In this case, the tape is pulled outward and the tape is retracted into the housing by manually rotating the reel.

[0078] The shell anti-retraction mechanism 141 of the positioning mechanism of the shell and the anti-slip convex part 62 of the protective cover 6 cooperate to prevent retreat, or the shell outlet hole convex part 112 of the shell outlet hole 11 and the protective cover anti-retraction convex part 68 of the protective cover cooperate to prevent retreat, which can effectively prevent the protective cover from sliding back into the shell in advance when the tape is only partially retracted into the shell, thereby protecting the user's fingers. During the reeling process, the hook-belt rivet assembly 41 contacts the locking device 61 of the protective cover 6 as the tape moves and engages with the locking device 61, so that the protective cover 6 and the hook-belt rivet assembly 41 are connected together. Subsequently, the entire locking connector is smoothly retracted into the shell 1, which is convenient for next use. The protective cover 6 of this design can be completely retracted into the shell 1 when not in use, making the tape measure simple and beautiful in appearance and easy to carry. In the use state, the protective cover 6 can be completely taken out of the shell 1, which increases the smoothness of operation and a strong sense of experience.

[0079] Reference Figures 3 to 11 , shows the snap-fit ​​connection between the protective sleeve 6 and the hook-and-belt rivet assembly 41 according to an exemplary embodiment. The hook-and-belt rivet assembly 41 is provided with a first snap-fit ​​structure, and the snap-fit ​​device 61 is provided with a second snap-fit ​​structure. The snap-fitting of the hook-and-belt rivet assembly 41 and the snap-fit ​​device 61 is achieved by snapping the first snap-fit ​​structure with the second snap-fit ​​structure, and the first snap-fit ​​structure and the second snap-fit ​​structure are snap-fitted in any of the following ways:

[0080] The convex portion 611 of the protective cover I is engaged with the upper convex portion 411 of the rivet, the convex portion 612 of the protective cover II is engaged with the lower convex portion 412 of the rivet, the convex portion 613 of the protective cover III is engaged with the concave portion 413 of the ruler hook I, the concave portion 614 of the protective cover I is engaged with the convex portion 414 of the ruler hook II, the hole hook 615 of the protective cover is engaged with the hole 415 of the ruler hook, the side hook 616 of the protective cover is engaged with the edge 416 of the ruler hook, the convex portion 617 of the protective cover IV is engaged with the edge 417 of the hook ruler belt head, the convex portion 618 of the protective cover V is engaged with the concave portion 418 of the ruler hook, and the concave portion 619 of the protective cover II is engaged with the convex portion 419 of the ruler hook III.

[0081] Reference Figure 3 , showing that the convex part 611 of the protective sleeve I is engaged with the convex part 411 of the rivet. When the hand pulls the hook assembly 4 and extends it outward, the convex part 611 of the protective sleeve I of the protective sleeve 6 is engaged with the convex part 411 of the rivet of the hook and rivet assembly 41, and the hook assembly 4 will take the protective sleeve 6 away from the inside of the housing 1, so that the protective sleeve 6 is exposed to protect the fingers.

[0082] Reference Figure 4 , showing that the convex part 612 of the protective sleeve II is engaged with the lower convex part 412 of the rivet. When the hand pulls the hook assembly 4 and extends it outward, the convex part 612 of the protective sleeve II of the protective sleeve 6 is engaged with the lower convex part 412 of the rivet of the hook belt rivet assembly 41, and the hook assembly 4 will take the protective sleeve 6 away from the inside of the housing 1, so that the protective sleeve 6 is exposed to protect the fingers.

[0083] Reference Figure 5 , showing that the convex portion 613 of the protective sleeve III is engaged with the concave portion 413 of the ruler hook I; its feature is: when the tape measure starts to be used, when the hand pulls the hook assembly 4 and extends it outward, the convex portion 613 of the protective sleeve III of the ruler tape protective sleeve 6 is engaged with the concave portion 413 of the ruler hook I of the hook tape rivet assembly 41, and the hook assembly 4 will bring the ruler tape protective sleeve 6 away from the inside of the housing 1, exposing the ruler tape protective sleeve 6 to protect the fingers.

[0084] Reference Figure 6 , showing that the protective sleeve I recessed portion 614 is engaged with the ruler hook II protrusion 414. When the hand pulls the hook assembly 4 and extends it outward, the protective sleeve I recessed portion 614 of the protective sleeve 6 is engaged with the ruler hook II protrusion 414 of the hook belt rivet assembly 41, and the hook assembly 4 will bring the protective sleeve 6 away from the inside of the housing 1, exposing the protective sleeve 6 to protect the fingers.

[0085] Reference Figure 7 , showing that the protective sleeve hole hook 615 is engaged with the ruler hook hole 415. When the hand pulls the hook assembly 4 to extend outward, the protective sleeve hole hook 615 of the protective sleeve 6 is engaged with the ruler hook hole 415 of the hook belt rivet assembly 41, and the hook assembly 4 will take the protective sleeve 6 away from the inside of the housing 1, so that the protective sleeve 6 is exposed to protect the fingers.

[0086] Reference Figure 8 , showing that the protective sleeve side hook 616 is engaged with the ruler hook edge 416. When the hand pulls the hook assembly 4 to extend outward, the protective sleeve side hook 616 of the protective sleeve 6 is engaged with the ruler hook edge 416 of the hook band rivet assembly 41, and the hook assembly 4 will bring the protective sleeve 6 away from the inside of the housing 1, so that the protective sleeve 6 is exposed to protect the fingers.

[0087] Reference Fig. 9 , showing that the convex part 617 of the protective cover IV is engaged with the edge 417 of the hook tape head. When the hand pulls the hook assembly 4 and extends it outward, the convex part 617 of the protective cover IV of the protective cover 6 is engaged with the edge 417 of the hook tape head of the hook tape rivet assembly 41, and the hook assembly 4 will take the protective cover 6 away from the inside of the housing 1, so that the protective cover 6 is exposed to protect the fingers.

[0088] Reference Fig.10 , showing that the protective cover V convex part 618 is engaged with the ruler hook concave part 418. When the hand pulls the hook assembly 4 to extend outward, the protective cover V convex part 618 of the protective cover 6 is engaged with the ruler hook concave part 418 of the hook belt rivet assembly 41, and the hook assembly 4 will take the protective cover 6 away from the inside of the housing 1, so that the protective cover 6 is exposed to protect the fingers.

[0089] Reference Fig.11 , showing that the protective sleeve II recess 619 is engaged with the ruler hook III protrusion 419. When the hand pulls the hook assembly 4 outward, the protective sleeve II recess 619 of the protective sleeve 6 is engaged with the ruler hook III protrusion 419 of the hook belt rivet assembly 41, and the hook assembly 4 will take the protective sleeve 6 away from the inside of the housing 1, so that the protective sleeve 6 is exposed to protect the fingers.

[0090] Reference Fig.12 , showing that the diameter 111 of the shell outlet hole 11 provided in the shell 1 is 0.1mm-8mm larger than the outer diameter 600 of the protective sleeve 6. This can reduce the obstruction when the protective sleeve 6 enters and exits the shell outlet hole 11, increase the smoothness, and also reduce the friction between the protective sleeve 6 and the shell outlet hole 11, effectively improving the service life of the product.

[0091] Reference Fig.13 , which is a schematic diagram of the inner diameter 699 of the protective cover 6. The inner diameter 699 of the protective cover 6 is 0.1mm-8mm larger than the arc diameter 300 of the ruler tape 3. This can reduce the obstruction of the ruler tape 3 in the protective cover 6, increase its smoothness of passage, and also reduce the friction between the ruler tape 3 and the protective cover 6, effectively improving the service life of the product.

[0092] Reference Fig.14, is a schematic diagram of the wall thickness of the protective sleeve 6. The wall thickness D of the protective sleeve 6 ranges from 0.2 mm to 3 mm. And the protective sleeve B surface 69 corresponding to the tape scale of the protective sleeve 6 is transparent or at least partially open. The digital scale function on the tape 3 can be clearly observed and used without obstruction, which also increases the aesthetics of the product itself.

[0093] Reference Fig.15 , is a schematic diagram of the rotation angle a of the protective sleeve 6. The protective sleeve anti-slip convex portion 62 moves along the positioning mechanism 14 toward the shell outlet hole 11. When the anti-slip convex portion 62 contacts the shell anti-slip portion 12, the protective sleeve 6 can rotate with the anti-slip convex portion 62 as the rotation axis. The rotation angle is greater than or equal to 5 degrees. The protective sleeve 6 is rotated 5 degrees or more toward the direction of the axis 13, so that the tape is bent and deformed or / and both sides of the tape are in contact with the inner wall of the protective sleeve 6 to generate static friction, preventing the tape 3 from being rolled up and stopping the tape 3 at the required length position. When the tape 3 leaves the protective sleeve 6, the angle of free rotation (or swing) of the protective sleeve 6 increases the smoothness of the tape 3. When the tape 3 is retracted and has not yet touched the protective sleeve 6, the angle of free rotation of the protective sleeve 6 can help the protective sleeve 6 stay at the shell outlet hole 11, preventing the protective sleeve 6 from retracting into the shell 1 before the tape 3, effectively increasing the safety factor.

[0094] Reference Figure 16-Figure 17 , shows a schematic diagram of the blocking method between the housing 1 and the protective sleeve 6. The cooperation between the housing 1 and the protective sleeve 6 is provided with a blocking method, and the blocking method is at least one of the following two schemes: Blocking method 1 is provided with a housing blocking mechanism 142 inside the housing 1. Blocking method 2 is that the protective sleeve 6 is provided with a protective sleeve blocking mechanism 67.

[0095] Reference Fig.16 , it is shown that a housing blocking mechanism 142 is provided inside the housing 1. The mechanism cooperates with the anti-dropout protrusion 62 on the protective cover 6. When the protective cover 6 is fully retracted into the housing 1, the housing blocking mechanism 142 will effectively support the anti-dropout protrusion 62, thereby preventing the protective cover 6 from accidentally falling into the housing 1, ensuring the smooth operation of the protective cover 6 when it is used next time.

[0096] Reference Fig.17 , it is shown that the protective sleeve 6 is provided with a protective sleeve blocking mechanism 67. Cooperating with the shell outlet hole 11 provided with the shell 1, when the protective sleeve 6 enters the deepest part of the shell 1, the shell outlet hole 11 will support the protective sleeve blocking mechanism 67 of the protective sleeve 6 to prevent the protective sleeve 6 from falling into the shell 1 and affecting the next use.

[0097] Reference Fig.18, shows an enlarged schematic diagram of the positioning mechanism 14. The housing 1 is provided with a positioning mechanism 14, and the anti-dropping protrusion 62 slides within the range guided and limited by the positioning mechanism 14, so that when the protective sleeve 6 enters and exits the housing 1, the smoothness and regularity are increased, and the experience is also enhanced.

[0098] Reference Figure 19-20 , shows a schematic diagram of the anti-retraction structure between the shell 1 and the protective sleeve 6. The shell 1 and the protective sleeve 6 are provided with an anti-retraction structure, and the anti-retraction structure is at least one of the following two schemes: anti-retraction structure 1, the positioning mechanism 14 of the shell 1 is provided with a shell anti-retraction mechanism 141, and the shell anti-retraction mechanism 141 cooperates with the anti-slip convex part 62 provided on the protective sleeve 6; anti-retraction structure 2, the shell outlet hole 11 of the shell 1 is provided with an outlet hole convex part 112, and the outlet hole convex part 112 cooperates with the protective sleeve anti-retraction convex part 68 provided on the protective sleeve 6.

[0099] Reference Fig.19 , it is shown that the positioning mechanism 14 of the housing 1 is provided with a housing anti-retraction mechanism 141, and the housing anti-retraction mechanism 141 cooperates with the anti-slip convex part 62 provided on the protective cover 6. When the protective cover 6 moves outward from the housing 1 to the housing outlet hole 11, the anti-slip convex part 62 will enter the housing anti-retraction mechanism 141. When the ruler tape 3 is rolled up, the blocking force generated by the anti-slip convex part 62 entering the housing anti-retraction mechanism 141 is greater than the friction force generated by the ruler tape 3 and the protective cover 6 when the ruler tape 3 is rolled up, and the protective cover 6 is stopped at the housing outlet hole 11, which plays a protective role; and the blocking force generated by the anti-slip convex part 62 entering the housing anti-retraction mechanism 141 is less than the impact force generated by the hook belt rivet assembly 41 and the protective cover 6 when the ruler tape 3 is rolled up. After the protective cover 6 and the hook belt rivet assembly 41 are reconnected together, they are smoothly retracted into the housing 1, which is convenient for carrying and next use.

[0100] Reference Fig. 20 , it is shown that the shell outlet hole 11 of the shell 1 is provided with an outlet hole protrusion 112, and the outlet hole protrusion 112 cooperates with the protective sleeve anti-retraction protrusion 68 provided on the protective sleeve 6. When the protective sleeve 6 moves outward from the shell 1 to the shell outlet hole 11, the protective sleeve anti-retraction protrusion 68 will slide over the outlet hole protrusion 112. When the tape 3 is rolled up, the blocking force brought by the outlet hole protrusion 112 to the protective sleeve anti-retraction protrusion 68 is greater than the friction force generated by the tape 3 and the protective sleeve 6 when the tape 3 is rolled up, so that the protective sleeve 6 is stopped at the shell outlet hole 11, which plays a protective role; and the blocking force generated by the anti-slip protrusion 62 entering the shell anti-retraction mechanism 141 is less than the impact force generated by the hook belt rivet assembly 41 and the protective sleeve 6 when the tape 3 is rolled up. After the protective sleeve 6 and the hook belt rivet assembly 41 are reconnected together, they are smoothly retracted into the shell 1, which is convenient for carrying and next use.

[0101] Reference Fig.21, showing that the protective cover 6 is provided with a notch 65, and the opening direction of the notch 65 is upward. The bending angle of the tape 3 when winding on the reel becomes larger, so that the length of the protective cover 6 can be effectively increased, allowing the user to increase the safety distance to prevent cuts. In addition, the notch 65 can also help the tape 3 to pass smoothly inside the protective cover 6, improving the user's sense of convenience and enhancing the user's experience.

[0102] Reference Fig. 22 , showing that the protective cover 6 is provided with a hook groove 66, which facilitates the rivet lower protrusion 412 to enter the protective cover 6 without hindrance, and also facilitates the rivet lower protrusion 412 to smoothly leave the protective cover 6, so that during the use of the tape measure, the friction between the tape 3 and the protective cover 6 can be effectively reduced, thereby increasing the service life of the protective cover 6.

[0103] The above shows and describes the basic principle, main features and advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model specification. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0104] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A tape measure that prevents the tape from cutting your hands, characterized by: include: A housing (1), wherein the housing (1) is provided with a housing outlet hole (11); A reel (2), the reel (2) being rotatably mounted in the housing (1); A tape ruler (3), the tape ruler (3) being wound around the reel (2), the tape ruler (3) being configured to switch between a storage state and a use state, wherein the tape ruler (3) is wound into the housing in the storage state, and extends out of the housing (1) through the housing outlet hole (11) in the use state; A hook assembly (4), wherein the hook assembly (4) is connected to the outer end of the ruler tape (3) via a rivet to form a hook-band rivet assembly (41); A protective sleeve (6) is movably mounted at the housing outlet (11) and is constrained by the housing, and comprises a locking device (61); In the process of retracting the tape measure (3) into the shell to change the tape measure (3) from the use state to the storage state, the hook tape rivet assembly (41) and the locking device (61) are locked into a locking connector to connect the protective cover (6) and the hook tape rivet assembly (41), and the protective cover (6) is brought into the shell (1) by the locking connector; in the process of extending the tape measure (3) out of the shell to change the tape measure (3) from the storage state to the use state, the protective cover (6) is brought out of the shell outlet hole (11) by the locking connector and is constrained and retained at the shell outlet hole (11) to play a protective role, and the hook tape rivet assembly (41) and the locking device (61) are disengaged to allow the tape measure to extend freely.

2. The tape measure for preventing the tape from cutting hands according to claim 1, characterized in that: The hook-belt rivet assembly (41) is provided with a first clamping structure, which is one of a protective sleeve I convex portion (611), a protective sleeve II convex portion (612), a protective sleeve III convex portion (613), a protective sleeve I concave portion (614), a protective sleeve hole hook (615), a protective sleeve side hook (616) or a protective sleeve IV convex portion (617), a protective sleeve V convex portion (618) and a protective sleeve II concave portion (619); The clamping device (61) is provided with a second clamping structure, which is one of a rivet upper convex portion (411), a rivet lower convex portion (412), a ruler hook I concave portion (413), a ruler hook II convex portion (414), a ruler hook hole (415), a ruler hook edge (416), a hook ruler belt head edge (417), a ruler hook concave portion (418) and a ruler hook III convex portion (419); The engagement of the hook-and-belt rivet assembly (41) and the engagement device (61) is achieved by the engagement of a first engagement structure and a second engagement structure, and the first engagement structure and the second engagement structure are engaged in any of the following ways: The convex portion (611) of the protective sleeve I is snap-fitted and connected with the convex portion (411) on the rivet; The convex portion (612) of the protective sleeve II is engaged and connected with the lower convex portion (412) of the rivet; The convex part (613) of the protective sleeve III is engaged and connected with the concave part (413) of the ruler hook I; The protective sleeve I concave portion (614) is snap-fitted and connected with the ruler hook II convex portion (414); The protective sleeve hole hook (615) is snap-fitted and connected with the ruler hook hole (415); The protective sleeve side hook (616) is snap-fitted and connected with the ruler hook edge (416); The protruding portion (617) of the protective cover IV is engaged and connected with the edge (417) of the hook tape head; The convex part (618) of the protective sleeve V is engaged and connected with the concave part (418) of the ruler hook; The protective sleeve II concave portion (619) is snap-fitted and connected with the ruler hook III convex portion (419).

3. The tape measure for preventing the tape from cutting hands according to claim 1, characterized in that: The protective sleeve (6) is configured to have at least one of the following specifications and sizes: (1) The diameter (111) of the shell outlet hole (11) is 0.1 mm to 8 mm larger than the outer diameter (600) of the protective sleeve (6); (2) the inner diameter (699) of the protective sleeve (6) is 0.1 mm to 8 mm larger than the diameter (300) of the arc surface of the tape (3); (3) The wall thickness of the protective sleeve (6) is 0.2 mm to 3 mm.

4. The tape measure for preventing the tape from cutting hands according to claim 1, characterized in that: The side of the protective sleeve (6) corresponding to the scale of the tape is transparent or at least partially open.

5. The tape measure for preventing the tape from cutting hands according to claim 1, characterized in that: The protective cover (6) is provided with an anti-slip convex portion (62), and a shell anti-slip portion (12) is provided in the shell. The anti-slip convex portion (62) is configured to move along the positioning mechanism (14) toward the shell outlet hole (11). When the anti-slip convex portion (62) contacts the shell anti-slip portion (12), the protective cover (6) can rotate at least 5 degrees with the anti-slip convex portion (62) as the rotation axis. The rotation of the protective cover (6) prevents the tape measure (3) from being rolled up and positions the tape measure (3) at a desired length.

6. The tape measure for preventing the tape from cutting hands according to claim 1, characterized in that: The protective sleeve (6) is blocked by at least one of the following blocking methods: Blocking method 1, the protective sleeve (6) is provided with an anti-slip convex portion (62), and a shell blocking mechanism (142) is provided inside the shell (1), the shell blocking mechanism (142) cooperates with the anti-slip convex portion (62), and when the protective sleeve (6) is completely retracted into the shell (1), the shell blocking mechanism (142) will effectively support the anti-slip convex portion (62); Blocking method 2: the protective sleeve (6) is provided with a protective sleeve blocking mechanism (67), and the protective sleeve blocking mechanism (67) cooperates with the shell outlet hole (11). When the protective sleeve (6) enters the deepest part of the shell (1), the shell outlet hole (11) will support the protective sleeve blocking mechanism (67) of the protective sleeve (6).

7. The tape measure for preventing the tape from cutting hands according to claim 1, characterized in that: The housing (1) is provided with a positioning mechanism (14), and the protective sleeve (6) is provided with an anti-slip convex portion (62), and the anti-slip convex portion (62) slides within the range guided and limited by the positioning mechanism (14).

8. The tape measure for preventing the tape from cutting hands according to claim 7, characterized in that: An anti-retraction structure is provided between the housing (1) and the protective sleeve (6), and the anti-retraction structure is at least one of the following anti-retraction structures: Anti-retreat structure 1, the positioning mechanism (14) is provided with a shell anti-retreat mechanism (141), the shell anti-retreat mechanism (141) cooperates with the anti-slip convex part (62), when the protective cover (6) moves out of the shell (1) to the shell outlet hole (11), the anti-slip convex part (62) enters the shell anti-retreat mechanism (141), when the ruler (3) is rolled into the shell, the blocking force generated by the anti-slip convex part (62) entering the shell anti-retreat mechanism (141) is greater than the friction force generated by the ruler (3) and the protective cover (6) when the ruler (3) is rolled, so that the protective cover (6) stops at the shell outlet hole (11); and the blocking force generated by the anti-slip convex part (62) entering the shell anti-retreat mechanism (141) is less than the impact force generated by the hook belt rivet assembly (41) and the protective cover (6) when the ruler (3) is rolled, and the protective cover (6) is smoothly retracted into the shell (1) after the protective cover (6) and the hook belt rivet assembly (41) are reconnected together; The second anti-retraction structure is that the shell outlet hole (11) is provided with an outlet hole convex portion (112), and the protective sleeve (6) is provided with a protective sleeve anti-retraction convex portion (68). The outlet hole convex portion (112) cooperates with the protective sleeve anti-retraction convex portion (68). When the protective sleeve (6) moves outward from the shell (1) to the shell outlet hole (11), the protective sleeve anti-retraction convex portion (68) slides over the outlet hole convex portion (112). When the tape (3) is rolled up, the outlet hole convex portion (112) contacts the protective sleeve anti-retraction convex portion (68). The blocking force of the portion (68) is greater than the friction force generated between the ruler (3) and the protective cover (6) when the ruler (3) is rolled up, so that the protective cover (6) is stopped at the shell outlet hole (11), thereby playing a protective role; the blocking force generated by the anti-slip convex portion (62) entering the shell anti-retraction mechanism (141) is smaller than the impact force generated between the hook belt rivet assembly (41) and the protective cover (6) when the ruler (3) is rolled up, and the protective cover (6) and the hook belt rivet assembly (41) are smoothly retracted into the shell (1) after being reconnected together.

9. The tape measure for preventing the tape from cutting hands according to claim 1, characterized in that: The protective sleeve (6) is provided with a notch (65), and the opening direction of the notch (65) is upward.

10. The tape measure for preventing the tape from cutting hands according to claim 1, characterized in that: The protective sleeve (6) is provided with a ruler hook groove (66) to facilitate the lower protrusion (412) of the rivet to enter the protective sleeve (6) without hindrance.

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