A tape measure

Abstract

The present invention discloses a tape measure, which includes a tape measure housing provided with a receiving cavity, a core component disposed in the receiving cavity, and a tape component wound around the core component. The tape measure housing is further provided with a tape outlet for the tape component to extend outwards, including a braking component and a driving component. The driving component is movably mounted on the tape measure housing. The core component is provided with a braking surface. When the driving component moves to the braking position, the driving component drives the braking component to contact and press against the braking surface of the core component to achieve braking. The present invention effectively avoids the wear of the scale on the surface of the tape, and increases the service life of the tape measure.

Description

Technical Field

[0001] The present invention relates to a tape measure, and more particularly to a tape measure that is more durable and has a good braking effect. Background Art

[0002] A tape measure is a commonly used measuring tool by people. The braking system of the existing tape measure usually uses a brake pad to contact the tape. Friction is generated between the brake pad and the tape to stop the tape, thereby achieving the braking of the tape measure. Due to the long-term contact and friction between the tape and the brake pad, it is easy to cause the surface scale of the tape to become unclear due to the friction of the brake pad, affecting the normal use of the tape measure; or the brake pad itself wears, resulting in a decrease in the braking ability of the tape measure; due to the above defects, the service life of the tape measure is reduced.

[0003] The braking system of the existing tape measure requires a large moving space, and the volume of the tape measure also needs a relatively large accommodating space accordingly, resulting in an increase in the volume of the tape measure. Summary of the Invention

[0004] In order to overcome the deficiencies in the prior art, the present invention provides a tape measure. The braking component of the tape measure contacts the core component to achieve the braking effect of the tape measure, effectively avoiding the wear of the surface scale of the tape and increasing the service life of the tape measure; and the braking system of the tape measure of the present invention requires a small moving space. Correspondingly, the tape measure of the present invention can be made smaller in volume.

[0005] In order to achieve the above object, the present invention is implemented by adopting the following technical solutions:

[0006] A tape measure includes a tape measure housing provided with a receiving cavity, a core component disposed in the receiving cavity, and a tape component wound around the core component. The tape measure housing is further provided with a tape outlet for the tape component to extend outwards, and includes a braking component and a driving component. The driving component is movably mounted on the tape measure housing. The core component is provided with a braking surface. When the driving component moves to the braking position, the driving component drives the braking component to contact and press against the braking surface of the core component to achieve braking.

[0007] Among them, a component can include a single-piece part or multiple parts.

[0008] Operating the braking component, when the braking component is in the braking position, the braking component contacts and presses against the braking surface of the core component, and the core component is restricted from rotating; conversely, when the braking component is away from the braking position, the braking component and the braking surface of the core component do not press against each other, and the core component can rotate freely.

[0009] Further, the tape measure includes an elastic member acting on the driving assembly, and the acting force of the elastic member causes the driving assembly to have a tendency to move to the braking position.

[0010] One end of the elastic member is fixedly connected to the driving assembly, and the other end is fixedly connected to the tape measure housing; specifically, the driving assembly is provided with a first elastic member fixing member, the first elastic member fixing member is a fixing hook, and the connecting end of the elastic member and the driving assembly is provided with a first fixing ring that matches the first elastic member fixing member and is sleeved on the first elastic member fixing member; the tape measure housing is provided with a second elastic member fixing member, the second elastic member fixing member is a fixing post, and the connecting end of the elastic member and the tape measure housing is provided with a second fixing ring that matches the second elastic member fixing member and is sleeved on the second elastic member fixing member.

[0011] When the driving assembly is away from the braking position, the elastic member is in a stretched state or a compressed state; when the elastic member is in a stretched state, the elastic member wants to return to its original state, so the elastic force generated by it pulls the driving assembly to move to the braking position; when the elastic member is in a compressed state, the elastic member wants to return to its original state, so the elastic force generated by it pushes the driving assembly to move to the braking position.

[0012] The elastic member is a spring.

[0013] Further, the tape measure can be set as: the driving assembly is slidably mounted on the tape measure housing, and along the direction from the braking position to the position away from the braking position, the distance between the inner wall of the tape measure housing where the driving assembly is located and the braking surface of the core component becomes larger from smaller.

[0014] Further, the braking assembly is connected to the driving assembly.

[0015] With the above structure, the braking assembly moves synchronously with the driving assembly; when the driving assembly is at the braking position, the braking assembly contacts and presses against the braking surface of the core component, and the core component is blocked from rotating; when the braking assembly is away from the braking position, since the distance between the tape measure housing and the core component becomes larger from smaller, the whole braking assembly moves from a smaller distance to a larger distance, and the braking assembly is separated from the braking surface of the core component, realizing the free rotation of the core component.

[0016] Further, the braking assembly is a wedge-shaped member; the driving assembly passes through the tape measure housing outward to form an operating member, and the braking assembly is connected to the operating member through a connecting member; more specifically, the driving assembly and the braking assembly are integrally formed.

[0017] The operating member is used for an operator to operate the driving assembly.

[0018] Further, the tape measure can be configured such that: the driving assembly includes a first driving member acting on the braking assembly, the first driving member is disposed on one side of the braking assembly, and in a state where the driving assembly moves to the braking position, the first driving member drives the braking assembly to contact and press against the outer circumferential braking surface of the core assembly.

[0019] When the driving assembly moves to the braking position, the first driving member drives the braking assembly to contact the braking surface of the core assembly, the first driving member presses down the braking assembly, and transmits the force to the braking assembly, so that the braking assembly and the braking surface of the core assembly are pressed against each other, and the core assembly is restricted from rotating; when the driving assembly moves away from the braking position, the first driving member does not press down the braking assembly, and the braking assembly and the core assembly are not pressed against each other, realizing the free rotation of the core assembly.

[0020] Further, the driving assembly includes a second driving member acting on the braking assembly, and the second driving member is disposed on the side opposite to the first driving member.

[0021] Since the second driving member is disposed on the side opposite to the first driving member, that is, on the other side of the braking assembly; when the driving assembly moves away from the braking position, the second driving member drives the braking assembly away from the braking surface of the core assembly, so that the braking assembly and the braking surface of the core assembly are separated. When the core assembly rotates freely, the contact between the core assembly and the braking assembly is reduced, the loss is reduced, and the service life is prolonged.

[0022] Specifically, the driving assembly protrudes toward the braking surface side of the core assembly to form the first driving member and the second driving member, and an activity space for accommodating the braking assembly is formed between the first driving member and the second driving member.

[0023] Further, the first driving member and the second driving member are rotatably disposed in the tape measure housing, one end of the first driving member acts on one side of the braking assembly, and one end of the second driving member acts on the other side of the braking assembly; a braking force is applied to the first driving member, and the braking force acts on the first driving member to press down the braking assembly, so that the braking assembly always has a tendency to contact and press against the braking surface of the core assembly; when the tape measure is in a reverse braking state, a reverse braking force is applied to the second driving member; the reverse braking force acts on the second driving member to lift the braking assembly, so that the braking assembly is separated from the braking surface of the core assembly.

[0024] Specifically, the first driving member and the second driving member adopt a plate-like structure, and the braking force acts between the rotation point of the first driving member and the contact end with the braking assembly; the counter-braking force acts on one end of the second driving member away from the braking assembly, and the rotation point of the second driving member is between the counter-braking force and the braking assembly.

[0025] More specifically, one end of the elastic member is fixed between the rotation point of the first driving member and the contact end with the braking assembly to provide a braking force; the driving assembly includes an operating member rotatably arranged on the tape measure housing, and an anti-braking rod is arranged at one end of the operating member, and the anti-braking rod acts on the side of the second driving member away from the braking assembly to provide a counter-braking force.

[0026] The elastic member acts on the first driving member. Since the acting point is between the rotation point and the contact end with the braking assembly, the contact end of the first driving member and the braking assembly rotates downward toward the side close to the braking assembly to press down the braking assembly, so that the braking assembly always has a tendency to press the braking surface.

[0027] Press the operating member, and the operating member rotates toward the side where the anti-braking rod is arranged. The anti-braking rod presses down one end of the second driving member away from the braking assembly. Since the anti-braking rod and the braking assembly are on both sides of the rotation point of the second driving member, the side acting on the braking assembly lifts the braking assembly, so that the braking assembly disengages from the braking surface of the core assembly.

[0028] Release the operating member, and the braking force drives the first driving member to press down the braking assembly. While the braking assembly presses the braking surface of the core assembly, it acts on the second driving member to reset the second driving member.

[0029] Further, the tape measure includes a guiding groove matching the braking assembly; the side end of the braking assembly is slidably clamped in the guiding groove.

[0030] Specifically, both side ends of the braking assembly are clamped in the guiding groove.

[0031] The guiding groove is used to guide the braking assembly to approach or move away from the braking surface of the core assembly.

[0032] Setting the guiding groove provides a moving track for the braking assembly, which can make the braking assembly move more smoothly and stably.

[0033] Since both ends of the braking component are clamped in the guiding groove, if the installation part of the braking component clamped into the guiding groove is rotatable; then during braking, when the braking component contacts the braking surface of the core component, the core component will drive the braking component to rotate, and the braking component and the braking surface of the core component will roll and squeeze. Using rolling friction extrusion can effectively reduce the friction loss between the two and increase the service life of the product.

[0034] Further, one end of the guiding groove intersects with the braking surface or its extension surface, and the other end extends away from the braking surface towards the tape measure housing side; along the direction of the guiding groove away from the braking surface, the guiding groove inclines towards the driving component side.

[0035] Since one end of the guiding groove intersects with the braking surface or its extension surface, when the braking component moves to the intersecting end of the guiding groove, it contacts and squeezes the braking surface; the other end of the guiding groove extends away from the braking surface towards the tape measure housing side, and when the braking component is in the far section, it separates from the braking surface.

[0036] Since the guiding groove inclines towards the braking component side, a V-shaped angle is formed between the guiding groove and the braking surface of the core component; the line connecting the two ends of the guiding groove is called the groove axis, and the angle between the tangent line of the intersection point of the groove axis and the core component and the groove axis is the V-shaped angle; when the driving component is in the braking position, the braking component moves towards the bottom of the guiding groove and contacts and squeezes the braking surface of the core component. Due to the existence of the V-shaped angle, the squeezing force between the braking component and the core component becomes larger and larger as it squeezes; enabling the core component to quickly stop rotating; when the driving component moves away from the braking position, the braking component moves towards the head of the guiding groove, causing the braking component to separate from the core component, and the core component rotates freely.

[0037] Further, the guiding groove is opened on the inner side wall of the tape measure housing.

[0038] Further, the driving component is provided with a guiding member, and the guiding groove is provided on the guiding member.

[0039] Further, the braking component is a circular shaft or a special-shaped shaft.

[0040] Using a circular shaft can achieve rolling friction between it and the core component, effectively reducing the friction loss between the two and increasing the service life of the product.

[0041] When using a special-shaped shaft, the braking component adopts a wedge-shaped shaft design; when adopting a wedge-shaped shaft design, the guiding groove only needs one end to intersect with the braking surface or its extension surface, and the other end extends away from the braking surface towards the tape measure housing side.

[0042] Further, a tooth-shaped structure is provided at a corresponding position where the braking assembly contacts the braking surface of the core component; or a tooth-shaped structure is provided at a corresponding position where the braking surface of the core component contacts the braking assembly; thereby increasing the frictional force between the braking assembly and the braking surface of the core component; of course, the optical axis structure can also achieve the braking of the core component.

[0043] When a circular shaft is adopted, the tooth-shaped structure of the braking surface of the core component adopts an arc-shaped groove that matches the circular shaft.

[0044] Further, the braking surface of the core component is formed as the outer circumferential surface of the core component or the braking surface of the core component is formed as the side circumferential surface that protrudes outward from the side surface of the core component.

[0045] Further, the tape measure includes a lower tape outlet installed at the tape outlet, which is used to support the lower surface of the tape component, so that the tape component can be pulled out more smoothly.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] (1) The tape measure of the present invention uses the braking assembly to contact and press against the outer circumference of the core component to achieve the braking of the tape measure; effectively avoiding the scale on the tape surface from becoming unclear due to friction; effectively extending the service life of the product.

[0048] (2) The tape measure of the present invention adopts a circular shaft, and changes the frictional force between the braking assembly and the core component into rolling friction, effectively reducing the frictional loss between the two.

[0049] (3) The tape measure of the present invention is provided with a guide groove, making the sliding of the braking assembly smoother.

[0050] (4) The guide groove of the tape measure of the present invention is inclined toward the braking assembly side, forming a V-shaped angle between the guide groove and the core component. When the braking assembly is in the braking position, the more the braking assembly and the core component are squeezed, the greater the squeezing force between the two, enabling the core component to stop rotating quickly.

[0051] (5) The braking assembly of the tape measure of the present invention and the parts cooperating with it are arranged compactly, and the space required for the braking assembly to achieve the conversion between braking and non-braking is small. Therefore, the tape measure of the present invention can be made to have a smaller volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 is a three-dimensional structural schematic diagram of the tape measure of the present invention;

[0053] Figure 2 is an internal structural schematic diagram of the tape measure of Embodiment 1 of the present invention;

[0054] Figure 3 Simplified schematic diagram of the internal structure of the tape measure in Embodiment 1 of the present invention;

[0055] Figure 4 Schematic diagram of the internal structure of the tape measure in Embodiment 2 of the present invention;

[0056] Figure 5 Exploded structure schematic diagram of the tape measure in Embodiment 2 of the present invention;

[0057] Figure 6 Schematic diagram of the structure where the elastic member in the tape measure of the present invention is a compression spring;

[0058] Figure 7 Simplified schematic diagram of the internal structure of the tape measure in Embodiment 2 of the present invention;

[0059] Figure 8 Schematic diagram of the structure where the braking component of the tape measure in Embodiment 2 of the present invention disengages from the braking surface;

[0060] Figure 9 Schematic diagram of the structure where the braking surface in the core component of the tape measure of the present invention is the outer circumference;

[0061] Figure 10 Schematic diagram of the structure where the braking surface in the core component of the tape measure of the present invention is the side circumference;

[0062] Figure 11 Schematic diagram of the structure of the tape measure in Embodiment 2 of the present invention and the braking surface is the side circumference;

[0063] Figure 12 Simplified schematic diagram of the structure of the tape measure in Embodiment 2 of the present invention and the braking surface is the side circumference;

[0064] Figure 13 Schematic diagram of the structure where the braking component in Embodiment 2 of the present invention is a circular shaft;

[0065] Figure 14 Schematic diagram of the structure of the tape measure in Embodiment 2 of the present invention and the braking component is a special-shaped shaft;

[0066] Figure 15 Simplified schematic diagram of the structure of the tape measure in Embodiment 2 of the present invention and the braking component is a special-shaped shaft;

[0067] Figure 16 Schematic diagram of the structure of the tape measure in Embodiment 2 of the present invention and the braking surface (outer circumferential surface) is a toothed shape structure and is an arc-shaped groove;

[0068] Figure 17 Simplified schematic diagram of the structure of the tape measure in Embodiment 2 of the present invention and the braking surface (outer circumferential surface) is a toothed shape structure and is an arc-shaped groove;

[0069] Figure 18Schematic diagram of the tape measure according to Embodiment 2 of the present invention, where the braking surface (side circumferential surface) has a tooth-shaped structure and is an arc-shaped groove;

[0070] Figure 19 Simplified schematic diagram of the tape measure according to Embodiment 2 of the present invention, where the braking surface (side circumferential surface) has a tooth-shaped structure and is an arc-shaped groove;

[0071] Figure 20 Schematic diagram of the tape measure according to Embodiment 2 of the present invention, where the guiding groove is provided on the driving assembly;

[0072] Figure 21 Schematic diagram of the tape measure housing when the driving assembly of the present invention is slidably installed;

[0073] Figure 22 Schematic diagram of the mating structure of the tape measure housing and the driving assembly when the driving assembly of the present invention is slidably installed;

[0074] Figure 23 Schematic diagram of Embodiment 3 of the present invention;

[0075] Reference numerals: 1 tape measure housing; 101 second elastic member fixing member; 102 driving assembly card slot; 1021 slide rail convex block; 1022 support block; 2 core component; 201 braking surface; 3 tape component; 4 braking component; 5 driving assembly; 501 first driving member; 502 second driving member; 503 operating member; 504 first elastic member fixing member; 505 connecting portion; 5051 clamping block; 5052 support arm; 5052a bayonet; 506 anti-braking rod; 507 connecting member; 6 elastic member; 601 first fixing ring; 602 second fixing ring; 7 guiding groove; 8 V-shaped angle; 9 lower tape opening of the tape measure. Detailed Description of the Invention

[0076] The following will further describe in detail the specific embodiments of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0077] Embodiment 1

[0078] As Figure 1 shown in FIG. -3, a tape measure includes a tape measure housing 1 provided with a receiving cavity, a core component 2 disposed in the receiving cavity, and a tape component 3 wound around the core component 2. The tape measure housing 1 is further provided with an outlet for the tape component 3 to extend outwards, including a braking component 4 and a driving assembly 5. The driving assembly 5 is movably installed on the tape measure housing 1. The core component 2 is provided with a braking surface 201. When the driving assembly 5 moves to the braking position, the driving assembly 5 drives the braking component 4 to contact and press against the braking surface 201 of the core component 2 to achieve braking.

[0079] Among them, the component may include a single-piece part or multiple parts.

[0080] Operate the brake component 4 so that when the brake component 4 is in the braking position, the brake component 4 contacts and presses against the braking surface 201 of the core component 2, and the core component 2 is restricted from rotating; conversely, when the brake component 4 moves away from the braking position, there is no mutual pressing between the brake component 4 and the braking surface 201 of the core component 2, and the core component 2 can rotate freely.

[0081] Preferably, the tape measure includes an elastic member 6 acting on the driving component 5, and the acting force of the elastic member 6 causes the driving component 5 to have a tendency to move to the braking position.

[0082] As Figure 2 shown, one end of the elastic member 6 is fixedly connected to the driving component 5, and the other end is fixedly connected to the tape measure housing 1; specifically, the driving component 5 is provided with a first elastic member fixing member 504, the first elastic member fixing member 504 is a fixing hook, and the connecting end of the elastic member 6 and the driving component 5 is provided with a first fixing ring 601 that matches the first elastic member fixing member 504 and is sleeved on the first elastic member fixing member 504; the tape measure housing 1 is provided with a second elastic member fixing member 101, the second elastic member fixing member 101 is a fixing post, and the connecting end of the elastic member 6 and the tape measure housing 1 is provided with a second fixing ring 602 that matches the second elastic member fixing member 101 and is sleeved on the second elastic member fixing member 101.

[0083] When the driving component 5 moves away from the braking position, the elastic member 6 is in a stretched state or a compressed state; as Figure 2 shown, when the elastic member 6 is in a stretched state, the elastic member 6 wants to return to its original state, so the elastic force generated by it pulls the driving component 5 to move to the braking position; referring to Figure 6 , when the elastic member 6 is in a compressed state, the elastic member 6 wants to return to its original state, so the elastic force generated by it pushes the driving component 5 to move to the braking position.

[0084] The elastic member 6 is a spring.

[0085] Preferably, the driving component 5 is slidably mounted on the tape measure housing 1, and along the direction from the braking position to the position away from the braking position, the distance between the inner wall of the tape measure housing 1 where the driving component 5 is located and the braking surface 201 of the core component 2 increases from small to large.

[0086] Preferably, the brake component 4 is connected to the driving component 5.

[0087] With the above structure, the braking assembly 4 moves synchronously with the driving assembly 5. When the driving assembly 5 is in the braking position, the braking assembly 4 contacts and presses against the braking surface 201 of the core assembly 2, and the core assembly 2 is blocked from rotating. When the braking assembly 4 moves away from the braking position, since the distance between the tape measure housing 1 and the core assembly 2 changes from small to large, the entire braking assembly 4 moves from a smaller distance to a larger distance, and the braking assembly 4 separates from the braking surface 201 of the core assembly 2, realizing the free rotation of the core assembly 2.

[0088] Preferably, the braking assembly 4 is a wedge-shaped member. The driving assembly 5 passes outwards through the tape measure housing 1 to form an operating member 503, and the braking assembly 4 is connected to the operating member 503 through a connecting member 507. In another embodiment, the driving assembly 5 and the braking assembly 4 are integrally formed.

[0089] The operating member 503 is used for an operator to operate the driving assembly 5.

[0090] Preferably, the braking surface 201 of the core assembly 2 is formed as the outer circumferential surface of the core assembly 2 or the braking surface 201 of the core assembly 2 is formed as the side circumferential surface that protrudes outward from the side surface of the core assembly 2.

[0091] Preferably, the tape measure includes a lower tape outlet 9 installed at the tape outlet for supporting the lower surface of the tape assembly 3, making it more stable when pulling out the tape assembly 3.

[0092] Embodiment 2

[0093] As Figure 1 、 Figure 4 shown in FIG. 20, a tape measure includes a tape measure housing 1 provided with a receiving cavity, a core assembly 2 disposed in the receiving cavity, and a tape assembly 3 wound around the core assembly 2. The tape measure housing 1 is further provided with a tape outlet for the tape assembly 3 to extend outwards, including a braking assembly 4 and a driving assembly 5. The driving assembly 5 is movably installed on the tape measure housing 1. The core assembly 2 is provided with a braking surface 201. When the driving assembly 5 moves to the braking position, the driving assembly 5 drives the braking assembly 4 to contact and press against the braking surface 201 of the core assembly 2 to achieve braking.

[0094] Among them, a component can include a single-piece part or multiple parts.

[0095] Operate the brake assembly 4 such that when the brake assembly 4 is in the braking position, the brake assembly 4 contacts and presses against the braking surface 201 of the core assembly 2, and the core assembly 2 is restricted from rotating; conversely, when the brake assembly 4 moves away from the braking position, there is no mutual pressing between the brake assembly 4 and the braking surface 201 of the core assembly 2, and the core assembly 2 can rotate freely.

[0096] Preferably, the tape measure includes an elastic member 6 acting on the driving assembly 5, and the acting force of the elastic member 6 causes the driving assembly 5 to have a tendency to move to the braking position.

[0097] When the driving assembly 5 moves away from the braking position, the elastic member 6 is in a stretched state or a compressed state and generates an elastic force acting on the driving assembly 5, causing the driving assembly 5 to have a tendency to move to the braking position; the elastic member 6 is a spring.

[0098] Preferably, the driving assembly 5 includes a first driving member 501 acting on the brake assembly 4. The first driving member 501 is disposed on one side of the brake assembly 4. In a state where the driving assembly 5 moves to the braking position, the first driving member 501 drives the brake assembly 4 to contact and press against the outer circumferential braking surface 201 of the core assembly 2.

[0099] The driving assembly 5 is slidably mounted on the tape measure housing 1.

[0100] When the driving assembly 5 moves to the braking position, the first driving member 501 drives the brake assembly 4 to contact the braking surface 201 of the core assembly 2. The first driving member 501 presses down the brake assembly 4 and transmits the force to the brake assembly 4, causing mutual pressing between the brake assembly 4 and the braking surface 201 of the core assembly 2, and the core assembly 2 is restricted from rotating; when the driving assembly 5 moves away from the braking position, the first driving member 501 does not press down the brake assembly 4, and there is no mutual pressing between the brake assembly 4 and the core assembly 2, realizing the free rotation of the core assembly 2.

[0101] Preferably, the driving assembly 5 includes a second driving member 502 acting on the brake assembly 4. The second driving member 502 is disposed on the side opposite to the first driving member 501.

[0102] Since the second driving member 502 is arranged on the side opposite to the first driving member 501, that is, on the other side of the braking assembly 4; when the driving assembly 5 moves away from the braking position, the second driving member 502 drives the braking assembly 4 away from the braking surface 201 of the cartridge assembly 2, so that the braking assembly 4 is separated from the braking surface 201 of the cartridge assembly 2. When the cartridge assembly 2 rotates freely, the contact between the cartridge assembly 2 and the braking assembly 4 is reduced, the loss is reduced, and the service life is prolonged.

[0103] Specifically, the driving assembly 5 protrudes toward the braking surface 201 side of the cartridge assembly 2 to form the first driving member 501 and the second driving member 502, and an activity space for accommodating the braking assembly 4 is formed between the first driving member 501 and the second driving member 502.

[0104] Such as Figure 21 、 Figure 22 As shown in the figure, preferably, the tape measure housing 1 is provided with a driving assembly card slot 102, the driving assembly 5 is slidably arranged in the driving assembly card slot 102, slide rail bumps 1021 are arranged on both sides of the driving assembly card slot 102 at the braking position, and a support block 1022 is arranged on the side far from the braking position; the driving assembly 5 includes an operating member 503 that penetrates out of the tape measure housing from the driving assembly card slot 102, a driving part located inside the tape measure housing, and a connecting part 505 for connecting the driving part and the operating member 503; the connecting part 505 includes a clamping block 5051 and a support arm 5052, the clamping block 5051 is recessed inward relative to the operating member 503 and the driving part, the connecting part 505 is provided with a support arm 5052 that extends toward both sides of the tape measure housing and contacts the edge of the driving assembly card slot 102, and a bayonet 5052a that matches the edge of the driving assembly card slot 102 is arranged at the contact position between the support arm 5052 and the edge of the driving assembly card slot 102.

[0105] Specifically, the driving part includes a first driving member 501 and a second driving member 502, the first driving member 501 and the second driving member 502 protrude from the connecting part 505, and an activity space for accommodating the braking assembly 4 is formed between the first driving member 501 and the second driving member 502; the support arm 5052 is formed on the side of the first driving member 501.

[0106] During assembly, the clamping block 5051 of the connecting part 505 is clamped between the slide rail bumps 1021 on both sides of the driving assembly card slot 102. Since the clamping block 5051 is recessed inward relative to the operating member 503 and the driving part, a slide rail groove matching the slide rail bumps 1021 is formed, so that the driving assembly 5 is slidably clamped in the driving assembly card slot 102;

[0107] When the support block 1022 provided in the driving component slot 102 slides the driving component 5, it supports the operating member 503 on the side away from the braking position;

[0108] The support arm 5052 contacts the edge of the driving component slot 102, making the sliding of the driving component 5 more stable and steady.

[0109] Preferably, the tape measure includes a guiding groove 7 that matches the braking component 4; the side end of the braking component 4 is slidably clamped in the guiding groove 7.

[0110] Specifically, both side ends of the braking component 4 are clamped in the guiding groove 7.

[0111] The guiding groove 7 is used to guide the braking component 4 to approach or move away from the braking surface 201 of the core component 2.

[0112] Setting the guiding groove 7 provides a moving track for the braking component 4, which can make the braking component 4 move more smoothly and stably.

[0113] Since both ends of the braking component 4 are clamped in the guiding groove 7, if the installation part of the braking component 4 clamped into the guiding groove 7 is of a rotatable shape; then during braking, when the braking component 4 contacts the braking surface 201 of the core component 2, the core component 2 will drive the braking component 4 to rotate, and the braking component 4 and the braking surface 201 of the core component 2 are in rolling extrusion. Using rolling friction extrusion can effectively reduce the friction loss between the two and increase the service life of the product.

[0114] Preferably, one end of the guiding groove 7 intersects with the braking surface 201 or its extended surface, and the other end extends away from the braking surface 201 toward the tape measure housing 1 side; along the direction of the guiding groove 7 away from the braking surface 201, the guiding groove 7 inclines toward the driving component 5 side.

[0115] Since one end of the guiding groove 7 intersects with the braking surface 201 or its extended surface, when the braking component 4 moves to the intersecting end of the guiding groove 7, it contacts and presses against the braking surface 201; the other end of the guiding groove 7 extends away from the braking surface 201 toward the tape measure housing 1 side, and when the braking component 4 is in the far - away section, it separates from the braking surface 201.

[0116] Such as Figure 7As shown, since the guiding groove 7 inclines towards the braking component 4 side, a V-shaped included angle 8 is formed between the guiding groove 7 and the braking surface 201 of the core component 2; the line connecting the two ends of the guiding groove 7 is called the groove axis, and the included angle between the tangent line of the intersection point of the groove axis and the core component 2 and the groove axis is the V-shaped included angle 8; when the driving component 5 is in the braking position, the braking component 4 moves towards the bottom of the guiding groove 7, contacts and presses against the braking surface 201 of the core component 2. Due to the existence of the V-shaped included angle 8, the squeezing force between the braking component 4 and the core component 2 becomes larger and larger as it is squeezed; enabling the core component 2 to quickly stop rotating; when the driving component 5 moves away from the braking position, the braking component 4 moves towards the head of the guiding groove 7, causing the braking component 4 to separate from the core component 2, and the core component 2 rotates freely.

[0117] Preferably, the guiding groove 7 is formed on the inner side wall of the tape measure housing 1.

[0118] As Figure 20 shown, preferably, the driving component 5 is provided with a guiding member, and the guiding groove 7 is arranged on the guiding member.

[0119] Preferably, the braking component 4 is a circular shaft or a special-shaped shaft.

[0120] By using a circular shaft, the friction between it and the core component 2 can be rolling friction, effectively reducing the friction loss between the two and increasing the service life of the product; as Figure 13 shown, and Figure 13 in the figure, the circular shaft located above the figure is a circular shaft provided with a toothed shape structure, and the circular shaft located below the figure is a smooth shaft.

[0121] As Figure 14 、 Figure 15 shown, when using a special-shaped shaft, the braking component 4 adopts a wedge-shaped shaft design. When adopting a wedge-shaped shaft design, the guiding groove 7 only needs to intersect with the braking surface 201 or its extended surface at one end, and extend away from the braking surface 201 towards the tape measure housing 1 side at the other end.

[0122] Preferably, as Figure 13 shown in the upper figure, the braking component 4 is provided with a toothed shape structure at the corresponding position in contact with the braking surface 201 of the core component 2; or the braking surface 201 of the core component 2 is provided with a toothed shape structure at the corresponding position in contact with the braking component 4, as Figure 16 、 Figure 17 shown; thereby increasing the frictional force between the braking component 4 and the braking surface 201 of the core component 2; of course, the smooth shaft structure can also achieve the braking of the core component 2.

[0123] As Figures 16 - 19As shown, when a circular shaft is adopted, the tooth-shaped structure of the braking surface 201 of the core component 2 adopts an arc-shaped groove that matches the circular shaft.

[0124] Preferably, the braking surface 201 of the core component 2 is formed as the outer circumferential surface of the core component 2 or the braking surface 201 of the core component 2 is formed as the circumferential surface of the side surface that protrudes outward from the side surface of the core component 2.

[0125] The braking surface 201 of the core component 2 adopts a tooth-shaped structure, that is, the outer circumference or the circumferential surface of the side surface of the core component 2 adopts a tooth-shaped structure; as Figures 16 - 19 shown, when a circular shaft is adopted, the tooth-shaped structure of the braking surface 201 of the core component 2 adopts an arc-shaped groove that matches the circular shaft, that is, the outer circumference or the circumferential surface of the side surface of the core component 2 adopts an arc-shaped groove that matches the circular shaft.

[0126] Preferably, the tape measure includes a lower tape opening 9 installed at the tape outlet, which is used to support the lower surface of the tape component 3, so that the tape component 3 can be pulled out more smoothly.

[0127] Embodiment 3

[0128] As Figure 1 、 Figure 23 shown, a tape measure includes a tape measure housing 1 provided with a receiving cavity, a core component 2 arranged in the receiving cavity, and a tape component 3 wound around the core component 2. The tape measure housing 1 is also provided with a tape outlet for the tape component 3 to extend outwards, including a braking component 4 and a driving component 5. The driving component 5 is movably installed on the tape measure housing 1. The core component 2 is provided with a braking surface 201. When the driving component 5 moves to the braking position, the driving component 5 drives the braking component 4 to contact and press against the braking surface 201 of the core component 2 to achieve braking.

[0129] Among them, the component can include a single-piece part or multiple parts.

[0130] Preferably, it includes an elastic member 6 acting on the driving component 5. The acting force of the elastic member 6 makes the driving component 5 have a tendency to move to the braking position; the elastic member 6 adopts a spring.

[0131] Preferably, the driving component 5 includes a first driving member 501 acting on the braking component 4. The first driving member 501 is arranged on one side of the braking component 4. When the driving component 5 moves to the braking position, the first driving member 501 drives the braking component 4 to contact and press against the outer circumferential braking surface 201 of the core component 2.

[0132] Preferably, the driving assembly 5 includes a second driving member 502 acting on the braking assembly 4, and the second driving member 502 is disposed on a side opposite to the first driving member 501.

[0133] Preferably, the first driving member 501 and the second driving member 502 are rotatably disposed in the tape measure housing 1. One end of the first driving member 501 acts on one side of the braking assembly 4, and one end of the second driving member 502 acts on the other side of the braking assembly 4. A braking force is applied to the first driving member 501, and the braking force acts on the first driving member 501 to press down the braking assembly 4, so that the braking assembly 4 always has a tendency to contact and press the braking surface 201 of the core assembly 2. In the anti-braking state of the tape measure, an anti-braking force is applied to the second driving member 502. The anti-braking force acts on the second driving member 502 to lift the braking assembly 4, so that the braking assembly 4 is separated from the braking surface 201 of the core assembly 2.

[0134] Specifically, the first driving member 501 and the second driving member 502 adopt a plate-like structure. The braking force acts between the rotation point of the first driving member 501 and the contact end with the braking assembly 4. The anti-braking force acts on one end of the second driving member 502 away from the braking assembly 4, and the rotation point of the second driving member 502 is between the anti-braking force and the braking assembly 4.

[0135] More specifically, one end of the elastic member 6 is fixed between the rotation point of the first driving member 501 and the contact end with the braking assembly 4 for providing a braking force. The driving assembly 5 includes an operating member 503 rotatably disposed on the tape measure housing 1. An anti-braking lever 506 is disposed at one end of the operating member 503, and the anti-braking lever 506 acts on the side of the second driving member 502 away from the braking assembly 4 for providing an anti-braking force.

[0136] The elastic member 6 acts on the first driving member 501. Since the acting point is between the rotation point and the contact end with the braking assembly 4, the contact end of the first driving member 501 with the braking assembly 4 rotates downward toward the side close to the braking assembly 4 to press down the braking assembly 4, so that the braking assembly 4 always has a tendency to press the braking surface 201.

[0137] The rotation point of the operating member 503 and the anti-braking lever 506 are respectively located at both ends of the operating member. Therefore, when the operating member 503 is pressed, the operating member 503 rotates towards the side where the anti-braking lever 506 is provided, and the anti-braking lever 506 presses down the end of the second driving member 502 away from the braking assembly 4. Since the anti-braking lever 506 and the braking assembly 4 are located on both sides of the rotation point of the second driving member 502, one side acting on the braking assembly 4 lifts the braking assembly 4, so that the braking assembly 4 disengages from the braking surface 201 of the core component 2.

[0138] When the operating member 503 is released, the braking force drives the first driving member 501 to press down the braking assembly 4. While the braking assembly 4 presses the braking surface 201 of the core component 2, it also acts on the second driving member 502, causing the second driving member 502 to reset.

[0139] Preferably, the tape measure includes a guiding groove 7 that matches the braking assembly 4; the side end of the braking assembly 4 is slidably clamped in the guiding groove 7.

[0140] Specifically, both side ends of the braking assembly 4 are clamped in the guiding groove 7.

[0141] Preferably, one end of the guiding groove 7 intersects with the braking surface 201 or its extension surface, and the other end extends away from the braking surface 201 towards the tape measure housing 1 side; along the direction of the guiding groove 7 away from the braking surface 201, the guiding groove 7 inclines towards the driving assembly 5 side; since the guiding groove 7 inclines towards the braking assembly 4 side, a V-shaped angle 8 is formed between the guiding groove 7 and the braking surface 201 of the core component 2.

[0142] Preferably, the guiding groove 7 is opened on the inner side wall of the tape measure housing 1.

[0143] Preferably, the driving assembly 5 is provided with a guiding member, and the guiding groove 7 is provided on the guiding member.

[0144] Preferably, the braking assembly 4 is a circular shaft or a special-shaped shaft.

[0145] Preferably, a tooth-shaped structure is provided at the corresponding position where the braking assembly 4 contacts the braking surface 201 of the core component 2; or a tooth-shaped structure is provided at the corresponding position where the braking surface 201 of the core component 2 contacts the braking assembly 4; thereby increasing the friction force between the braking assembly 4 and the braking surface 201 of the core component 2; of course, the core component 2 can also be braked with a smooth shaft structure.

[0146] Preferably, the braking surface 201 of the core component 2 is formed as the outer circumferential surface of the core component 2 or the braking surface 201 of the core component 2 is formed as the side circumferential surface of the side outward protrusion of the core component 2.

[0147] Preferably, the tape measure includes a lower tape opening 9 installed at the tape outlet, which is used to support the lower surface of the tape component 3, so that the tape component 3 can be pulled out more smoothly.

[0148] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A tape measure, comprising a tape measure housing (1) provided with a receiving cavity, a core assembly (2) disposed in the receiving cavity, and a tape assembly (3) wound around the core assembly (2), wherein the tape measure housing (1) is further provided with a tape outlet for the tape assembly (3) to extend outwards, and is characterized in that: It includes a braking component (4) and a driving component (5). The driving component (5) is movably installed on the tape measure housing (1). The core component (2) is provided with a braking surface (201). When the driving component (5) moves to the braking position, the driving component (5) drives the braking component (4) to contact and press against the braking surface (201) of the core component (2) to achieve braking. The driving component (5) includes a first driving member (501) acting on the braking component (4). The first driving member (501) is arranged on one side of the braking component (4). When the driving component (5) moves to the braking position, the first driving member (501) drives the braking component (4) to contact and press against the outer circumferential braking surface (201) of the core component (2). The driving component (5) includes a second driving member (502) acting on the braking component (4). The second driving member (502) is arranged on the side opposite to the first driving member (501). The tape measure includes a guiding groove (7) that matches the braking component (4). The side end of the braking component (4) is slidably clamped in the guiding groove (7).

2. The tape measure according to claim 1, wherein: It includes an elastic member (6) acting on the driving component (5). The acting force of the elastic member (6) makes the driving component (5) tend to move to the braking position.

3. The tape measure according to claim 1, characterized in that: The driving component (5) protrudes toward the side of the braking surface (201) of the core component (2) to form the first driving member (501) and the second driving member (502). An activity space for accommodating the braking component (4) is formed between the first driving member (501) and the second driving member (502).

4. The tape measure according to claim 1, wherein: The first driving member (501) and the second driving member (502) are rotatably arranged in the tape measure housing (1). One end of the first driving member (501) acts on one side of the braking component (4), and one end of the second driving member (502) acts on the other side of the braking component (4). A braking force is applied to the first driving member (501), and the braking force acts on the first driving member (501) to press down the braking component (4) so that the braking component (4) always has a tendency to contact and press against the braking surface (201) of the core component (2). When the tape measure is in the anti-braking state, an anti-braking force is applied to the second driving member (502). The anti-braking force acts on the second driving member (502) to lift the braking component (4) so that the braking component (4) disengages from the braking surface (201) of the core component (2).

5. The tape measure according to claim 1, characterized in that: One end of the guiding groove (7) intersects with the braking surface (201) or its extension surface, and the other end extends away from the braking surface (201) toward the side of the tape measure housing (1).

6. The tape measure according to claim 1, wherein: Along the direction in which the guiding groove (7) is away from the braking surface (201), the guiding groove (7) is inclined toward the side of the driving component (5).

7. The tape measure according to claim 1, wherein: The guiding groove (7) is formed on the inner side wall of the tape measure housing (1).

8. The tape measure according to claim 1, wherein: The driving assembly (5) is provided with a guiding member, and the guiding groove (7) is arranged on the guiding member.

9. The tape measure according to claim 1, wherein: The braking assembly (4) is a circular shaft or a special-shaped shaft.

10. The tape measure according to claim 1, wherein: The braking assembly (4) is provided with a tooth-shaped structure at a corresponding position in contact with the moving surface of the core component (2); or the braking surface (201) of the core component (2) is provided with a tooth-shaped structure at a corresponding position in contact with the braking assembly (4).

11. The tape measure according to claim 1, characterized in that: The braking surface (201) of the core component (2) is formed as the outer circumferential surface of the core component (2) or the braking surface (201) of the core component (2) is formed as the circumferential side surface of the side outward protrusion of the core component (2).

12. The tape measure according to claim 1, characterized in that: The tape measure housing (1) is provided with a driving assembly card slot (102), the driving assembly (5) is slidably arranged in the driving assembly card slot (102), slide rail bumps (1021) are arranged on both sides of the driving assembly card slot (102) at the braking position, and a support block (1022) is arranged on the side away from the braking position; the driving assembly (5) includes an operating member (503) formed by passing out of the tape measure housing from the driving assembly card slot (102), a driving part located inside the tape measure housing, and a connecting part (505) for connecting the driving part and the operating member (503); the connecting part (505) includes a clamping block (5051) and a support arm (5052), the clamping block (5051) is recessed inward relative to the operating member (503) and the driving part, the connecting part (505) is provided with a support arm (5052) extending towards both sides of the tape measure housing and contacting the edge of the driving assembly card slot (102), and a bayonet (5052a) matching the edge of the driving assembly card slot (102) is arranged at the contact position of the support arm (5052) and the edge of the driving assembly card slot (102).

13. The tape measure according to claim 1, wherein: The installation part of the braking assembly (4) inserted into the guiding groove (7) is of a rotatable shape, and rolling extrusion is carried out between the braking assembly (4) and the braking surface (201) of the core component (2).

Images