Statically Determined Tape Hinge

Abstract

A hyperstatic tape measure hinge relates to the technical field of aerospace folding and unfolding mechanisms. The hyperstatic tape measure hinge comprises a fixed flap, a movable flap, a tape measure sheet, a rotary locking assembly and movable parts arranged in pairs; the movable parts can be slidably arranged in the fixed flap and the movable flap; the first tape measure sheet and the second tape measure sheet of the tape measure sheet are opposite or opposite to each other; the fixed flap and the movable flap are fixedly connected with the first tape measure sheet; the second tape measure sheet is fixedly connected between the movable parts arranged in pairs; the rotary locking assembly connects the fixed flap and the movable flap; the movable assembly can move so that the first tape measure sheet and the second tape measure sheet are located on the same side of the rotary locking assembly; the tape measure hinge is in a hyperstatic state when it is in the unfolded state. The purpose of the present invention is to provide a hyperstatic tape measure hinge to solve the technical problems existing in the prior art that the unfolding stiffness of the tape measure hinge is low, the tape measure sheet can be folded at any position, and the relative motion trajectory of the unfolded two objects cannot be predicted and there is a collision.

Description

Technical Field

[0001] The invention relates to the technical field of aerospace folding and unfolding mechanisms, and in particular to a hyperstatic tape measure hinge. Background Art

[0002] Hinges are widely used in aerospace, and the tape hinge is one of them. The tape piece in the tape hinge provides power for the hinge to unfold, and after the hinge unfolds, the tape piece's own structural characteristics can provide a certain degree of rigidity for the hinge.

[0003] Traditional tape measure hinges have the characteristics of simple structure, light weight, and high unfolding precision, but they also have inherent defects. Since the tape measure piece in the tape measure hinge has a certain flexibility, its rigidity is low, and it can be folded at any position, the relative motion trajectory of the two objects connected to the tape measure hinge when unfolding is unpredictable, and there is a risk of collision with other structures during the unfolding process. In addition, as the requirements for tape measure hinges become higher and higher, the rigidity of existing tape measure hinges is difficult to meet the requirements when unfolded. Summary of the invention

[0004] The purpose of the present invention is to provide a hyperstatic tape measure hinge, so as to solve the technical problems existing in the prior art that the unfolding stiffness of the tape measure hinge is low and the tape measure sheet can be folded at any position, resulting in unpredictable relative motion trajectory of two objects and collision.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A hyperstatic tape measure hinge comprises a fixed petal, a movable petal, a tape measure sheet, a rotary locking assembly and movable parts arranged in pairs;

[0007] Among the movable parts arranged in pairs, one of the movable parts can be slidably arranged in the top groove of the fixed flap, and the other movable part can be slidably arranged in the top groove of the movable flap;

[0008] The measuring tape comprises a first measuring tape and a second measuring tape; the arc surface of the first measuring tape and the arc surface of the second measuring tape are opposite to or opposite to each other;

[0009] The first measuring tape is fixedly connected between the fixed flap and the movable flap; the second measuring tape is fixedly connected between the movable members arranged in pairs; wherein the movable members arranged in pairs and the corresponding second measuring tape form a movable assembly;

[0010] One end of the rotary locking assembly is connected to the fixed flap, and the other end is connected to the movable flap; the movable flap is configured to rotate relative to the fixed flap around the rotary axis of the rotary locking assembly;

[0011] The movable assembly can move along the thickness direction of the tape measure hinge so that the first tape measure piece and the second tape measure piece are located on the same side of the rotation axis of the rotation locking assembly;

[0012] When the tape measure hinge is in an unfolded state, along the thickness direction of the tape measure hinge, the rotation axis of the rotation locking assembly is located between the first tape measure piece and the second tape measure piece, so that the tape measure hinge is in a hyperstatic state.

[0013] In a possible implementation, the hyperstatic tape measure hinge further includes a stop assembly;

[0014] The fixed flap and the movable flap are respectively provided with a stopper mounting hole for accommodating the stopper assembly;

[0015] When the first measuring tape and the second measuring tape are located on the same side of the rotation axis of the rotary locking assembly, the stop assembly can extend through the stop mounting hole into the top groove of the fixed flap or the top groove of the movable flap, and be inserted into the movable part to lock the movable part.

[0016] In a possible implementation manner, the stop assembly includes a stop pin and a stop elastic member;

[0017] The head end of the stop pin is arranged in the stop mounting hole, and the stop pin can pass through the stop mounting hole and extend into the top groove of the fixed flap or the top groove of the movable flap, and be inserted into the movable part to lock the movable part;

[0018] The stop elastic member is sleeved on the stop pin, and the stop elastic member has a tendency to make the stop pin move away from the movable member.

[0019] In a possible implementation manner, the stopper assembly further includes a stopper rotating shaft and a pulley; the pulley is connected to the tail end of the stopper pin via the stopper rotating shaft pin;

[0020] The pulley can abut against the rotary locking assembly; the stop pin is provided with a stop pin stop portion to prevent itself from being separated from the fixed flap or the movable flap; the stop elastic member is provided between the stop pin stop portion and the head end of the stop pin;

[0021] The stop elastic member is a spring; the stop elastic member is always in a compressed state.

[0022] In a possible implementation, the swivel locking assembly includes a first swivel shaft, a second swivel shaft, a swivel pin, a first stop rod and a second stop rod;

[0023] One end of the first rotating shaft rod is hinged to one end of the second rotating shaft rod through the rotating pin; the axis of the rotating pin is the rotating axis;

[0024] The other end of the first rotating shaft is fixedly connected to the movable flap; the other end of the second rotating shaft is fixedly connected to the fixed flap;

[0025] The first baffle rod is arranged in the first rotating shaft rod, and the second baffle rod is arranged in the second rotating shaft rod;

[0026] When the measuring tape hinge is in the unfolded state, the head end of the second stop rod can be plugged into the tail end of the first stop rod to lock the first rotating shaft rod and the second rotating shaft rod.

[0027] In a possible implementation, when the tape measure hinge is in an unfolded state, the pulley configured to move with the stop pin can extend out of the fixed flap or the movable flap, and has a gap with the tail end of the second stop rod or the head end of the first stop rod;

[0028] The first gear lever is covered with a first elastic member; the first elastic member is configured to drive the first gear lever to have a tendency to extend out of the first rotating shaft;

[0029] The second baffle rod is covered with a second elastic member; the second elastic member is configured to drive the second baffle rod to have a tendency to extend out of the second rotating shaft; when the tape measure hinge is in an unfolded state, the first baffle rod driven by the first elastic member is plugged into the second baffle rod driven by the second elastic member, and the first rotating shaft and the second rotating shaft are kept in a locked state;

[0030] The first stopper rod is provided with a stopper structure to prevent the first stopper rod from being separated from the first rotating shaft rod;

[0031] The second baffle rod is provided with a stop structure for preventing the second baffle rod from being separated from the second rotating shaft rod.

[0032] In a possible implementation manner, the movable member includes a movable support member, a movable pressing member and a movable stopper; the second measuring tape is fixed between the support member and the movable pressing member, and the movable pressing member is provided between the second measuring tape and the movable stopper; the movable stopper is provided with a movable stopper groove that cooperates with the stopper pin; the stopper pin is plugged into the movable stopper groove, so that the rotary axis of the rotary locking assembly is locked between the first measuring tape and the second measuring tape, thereby making the measuring tape hinge in a hyperstatic state;

[0033] A guide pin cooperating with the movable part is arranged in the top groove of the fixed flap or the top groove of the movable flap; a guide pin elastic part is arranged on the outer sleeve of the guide pin; the guide pin elastic part has a tendency to make the movable part move away from the fixed flap or the movable flap;

[0034] Optionally, the movable pressing member and the movable stopper are integrally formed, or the movable pressing member and the movable stopper are detachably and fixedly connected;

[0035] Optionally, the guide pin includes a guide cone portion that cooperates with the movable pressing member; the guide cone portion is in a frustum shape, and the small-section end of the guide cone portion is located below the large-section end of the guide cone portion; the maximum cross-sectional area of ​​the guide cone portion is greater than the maximum cross-sectional area of ​​the corresponding hole of the movable pressing member;

[0036] The guide pin further comprises a guide threaded portion threadedly connected to the fixed flap or the movable flap; the guide threaded portion is fixedly connected to the bottom end of the guide conical portion;

[0037] The guide pin also includes a guide straight section; the guide straight section is fixedly connected to the top end of the guide cone portion; and the guide straight section is provided with planes parallel to each other.

[0038] In a possible implementation manner, the hyperstatic tape measure hinge further includes a pressing member;

[0039] The fixing flap is fixedly connected to the pressing member, so that one end of the first measuring tape is fixed between the fixing flap and the pressing member;

[0040] The movable flap is fixedly connected to the pressing member so that the other end of the first measuring tape is fixed between the movable flap and the pressing member.

[0041] In a possible implementation manner, the fixed flap and / or the movable flap is a fixed seat;

[0042] The fixed seat comprises a seat body; the seat body is provided with a fixed seat arc surface portion; the number of the fixed seat arc surface portions is the same as the number of the first measuring tape pieces;

[0043] The first measuring tape is fixed on the arc surface of the fixing seat;

[0044] Optionally, the clamping member includes a clamping arc portion and two clamping plane portions; the two clamping plane portions are fixedly connected via the clamping arc portion; the clamping arc portion, the first tape measure piece and the fixed seat arc portion are fixedly connected in sequence; the clamping plane portion is fixedly connected to the seat body.

[0045] In a possible implementation manner, the fixing seat is provided with a fixing seat flange for fixed connection with an object; the fixing seat flange is provided with an object mounting hole;

[0046] A weight-reducing groove is provided on one side of the seat body away from the arc surface of the fixed seat;

[0047] Along the width direction of the tape measure hinge, the rotary locking assembly is arranged on one side or both sides of the fixed flap;

[0048] The number of the first measuring tape pieces is two, the number of the second measuring tape piece is one, and one second measuring tape piece is located between the two first measuring tape pieces.

[0049] The beneficial effects of the present invention are mainly:

[0050] The hyperstatic tape measure hinge provided by the present invention is arranged such that the arc surface of the first tape measure piece and the arc surface of the second tape measure piece are opposite or opposite to each other, so as to facilitate the unfolding of the tape measure hinge; one end of the rotary locking assembly is connected to the fixed flap, and the other end is connected to the movable flap, and the movable assembly moves along the thickness direction of the tape measure hinge so that the first tape measure piece and the second tape measure piece are located on the same side of the rotation axis of the rotary locking assembly, so that when the tape measure hinge is folded, the movable flap can rotate relative to the fixed flap around the rotation axis of the rotary locking assembly, providing the tape measure piece with a folding rotation axis, so that the relative motion trajectory of the two objects connected to the tape measure hinge when unfolded can be predicted, and the risk of collision between the tape measure hinge and other structures during the unfolding process is greatly reduced. When the tape measure hinge is in the unfolded state, the rotation axis of the rotary locking assembly is located between the first tape measure piece and the second tape measure piece, so that the tape measure hinge is in a hyperstatic state, so as to improve the rigidity of the tape measure hinge to a certain extent.

[0051] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0053] Figure 1 A schematic diagram of the structure of the hyperstatic tape measure hinge in an unfolded state provided by an embodiment of the present invention;

[0054] Figure 2 for Figure 1 A front view of the hyperstatic tape hinge is shown;

[0055] Figure 3 for Figure 2 The AA section view of the hyperstatic tape hinge shown;

[0056] Figure 4 A schematic diagram of the structure of a folded state of a hyperstatic tape measure hinge provided by an embodiment of the present invention;

[0057] Figure 5 A schematic diagram of the structure of a fixing base provided in an embodiment of the present invention;

[0058] Figure 6 Another structural schematic diagram of a fixing base provided in an embodiment of the present invention;

[0059] Figure 7 A schematic diagram of the structure of a rotary locking assembly provided in an embodiment of the present invention;

[0060] Figure 8 for Figure 7 A sectional view of the rotary locking assembly along the line BB shown;

[0061] Fig. 9 for Figure 8 An enlarged view of area C of the rotary locking assembly shown;

[0062] Fig.10 A schematic diagram of the structure of a stopper assembly provided in an embodiment of the present invention;

[0063] Fig.11 A schematic diagram of the structure of a guide pin provided in an embodiment of the present invention;

[0064] Fig.12 A schematic diagram of the structure of an active component provided in an embodiment of the present invention.

[0065] Icons: 100-fixed flap; 200-movable flap; 300-tape measure; 310-first tape measure; 320-second tape measure; 400-pressing member; 500-swivel locking assembly; 510-first swivel shaft; 520-second swivel shaft; 530-swivel pin; 540-first stop bar; 550-second stop bar; 560-first elastic member; 570-second elastic member; 600-fixed seat; 610-seat body; 620-fixed seat arc surface; 630-fixed seat convex edge; 631-object installation Hole; 640-weight reduction groove; 650-stopper mounting hole; 660-guide pin; 661-guide threaded portion; 662-guide conical portion; 663-guide straight section; 670-guide pin elastic member; 700-stopper assembly; 710-stopper pin; 711-stopper pin stop portion; 720-stopper elastic member; 730-stopper rotating shaft; 740-pulley; 800-movable assembly; 810-movable member; 811-movable supporting member; 812-movable clamping member; 813-movable stopper; 814-movable stopper groove. DETAILED DESCRIPTION

[0066] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0067] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0068] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0069] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0070] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0071] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0072] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0073] Example

[0074] This embodiment provides a hyperstatic tape measure hinge; please refer to Figure 1-Figure 12 , Figure 1 and Figure 4 The following is a schematic diagram of the structure of the hyperstatic tape measure hinge in two states provided in this embodiment, wherein: Figure 1 This is a schematic diagram of the structure of the hyperstatic tape hinge in the unfolded state. Figure 4 This is a schematic diagram of the folded structure of the hyperstatic tape hinge. Figure 2 for Figure 1 The front view of the statically indeterminate tape hinge is shown. Figure 3 for Figure 2 The AA section view of the hyperstatic tape hinge shown; Figure 5 and Figure 6 Schematic diagram of the structure of the fixing base provided in this embodiment from two different viewing angles; Figure 7A schematic diagram of the structure of the rotary locking assembly provided in this embodiment, Figure 8 for Figure 7 The BB section view of the rotary locking assembly shown, Fig. 9 for Figure 8 An enlarged view of area C of the rotary locking assembly shown; Fig.10 A schematic diagram of the structure of the stopper assembly provided in this embodiment; Fig.11 A schematic diagram of the structure of the guide pin provided in this embodiment; Fig.12 A schematic diagram of the structure of the active components provided in this embodiment.

[0075] The hyperstatic tape measure hinge provided in this embodiment can be used for the deployment of solar wings and antennas in spacecraft, and can also be used for other mechanisms that need to be folded and unfolded.

[0076] See also Figure 1-Figure 12 As shown, the hyperstatic tape measure hinge (hereinafter referred to as tape measure hinge) described in this embodiment includes a fixed flap 100, a movable flap 200, a tape measure sheet 300, a rotary locking assembly 500 and movable parts 810 arranged in pairs.

[0077] Among the movable members 810 arranged in pairs, one movable member 810 can be slidably arranged in the top groove of the fixed flap 100 , and the other movable member 810 can be slidably arranged in the top groove of the movable flap 200 .

[0078] The tape measure piece 300 includes a first tape measure piece 310 and a second tape measure piece 320; the arc surface of the first tape measure piece 310 and the arc surface of the second tape measure piece 320 are opposite or opposite; for example, the number of the first tape measure piece 310 is one or more; the number of the second tape measure piece 320 is one or more; for example, along the thickness direction of the tape measure hinge, the arc surface of the first tape measure piece 310 faces upward, and the arc surface of the second tape measure piece 320 faces downward; vice versa. Optionally, the number of the tape measure pieces 300 is three; wherein the number of the first tape measure pieces 310 is two, the number of the second tape measure piece 320 is one, and one second tape measure piece 320 is located between the two first tape measure pieces 310.

[0079] A first measuring tape 310 is fixedly connected between the fixed flap 100 and the movable flap 200. For example, the first measuring tape 310 is located at the bottom of the fixed flap 100 and the movable flap 200. In this embodiment, the fixed flap 100 is relative to the movable flap 200 and is not absolutely fixed.

[0080] The second measuring tape 320 is fixedly connected between the movable members 810 arranged in pairs, so that the second measuring tape 320 moves with the movable members 810 arranged in pairs; wherein the movable members 810 arranged in pairs and the corresponding second measuring tape 320 form a movable assembly 800.

[0081] One end of the swivel locking assembly 500 is connected to the fixed flap 100, and the other end of the swivel locking assembly 500 is connected to the movable flap 200; the movable flap 200 is configured to rotate around the swivel axis of the swivel locking assembly 500 relative to the fixed flap 100; optionally, the swivel axis of the swivel locking assembly 500 is located in the middle of the swivel locking assembly 500, for example, the swivel axis of the swivel locking assembly 500 is located at the center position of the swivel locking assembly 500 or other non-center position. By providing the swivel locking assembly 500 in the tape measure hinge, a fixed swivel axis can be provided for the tape measure hinge, and the rigidity of the tape measure hinge can be improved to a certain extent.

[0082] The movable assembly 800 can move along the thickness direction of the tape measure hinge, so that the first tape measure piece 310 and the second tape measure piece 320 are located on the same side of the rotation axis of the rotary locking assembly 500, so that the movable flap 200 rotates relative to the fixed flap 100 around the rotation axis of the rotary locking assembly 500, so that the tape measure hinge can be folded. The movable assembly 800 moves along the thickness direction of the tape measure hinge, that is, one movable part 810 moves along the top groove of the fixed flap 100, and the other movable part 810 moves along the top groove of the movable flap 200.

[0083] When the tape measure hinge is in the unfolded state, along the thickness direction of the tape measure hinge, the rotation axis of the rotary locking assembly 500 is located between the first tape measure piece 310 and the second tape measure piece 320, so that the tape measure hinge is in a hyperstatic state.

[0084] When the tape measure hinge is in the folded state, along the thickness direction of the tape measure hinge, the rotation axis of the rotation locking assembly 500 is located on the same side of the first tape measure piece 310 and the second tape measure piece 320 .

[0085] The length, width and thickness directions of the tape measure hinge described in this embodiment all refer to the length, width and thickness directions when the tape measure hinge is in an unfolded state, that is, the tape measure hinge is in an unfolded state. Along the thickness direction of the tape measure hinge, the fixed flap 100 includes a corresponding top and bottom, and the movable flap 200 also includes a corresponding top and bottom.

[0086] The hyperstatic tape measure hinge described in this embodiment is arranged such that the arc surface of the first tape measure piece 310 and the arc surface of the second tape measure piece 320 are opposite or opposite to each other, so as to facilitate the unfolding of the tape measure hinge; one end of the rotary locking assembly 500 is connected to the fixed flap 100, and the other end is connected to the movable flap 200, and the movable assembly 800 moves along the thickness direction of the tape measure hinge so that the first tape measure piece 310 and the second tape measure piece 320 are located on the same side of the rotation axis of the rotary locking assembly 500, so that when the tape measure hinge is folded, the movable flap 200 can rotate around the rotation axis of the rotary locking assembly 500 relative to the fixed flap 100, providing the tape measure piece 300 with a folding rotation axis, so that the relative motion trajectory of the two objects connected to the tape measure hinge when unfolded can be predicted, and the risk of collision between the tape measure hinge and other structures during the unfolding process is greatly reduced. When the tape measure hinge is in the unfolded state, the rotation axis of the rotary locking assembly 500 is located between the first tape measure piece 310 and the second tape measure piece 320, so that the tape measure hinge is in a hyperstatic state, thereby improving the rigidity of the tape measure hinge to a certain extent.

[0087] In the optional solution of this embodiment, see Figure 1-Figure 6 and Fig.10 As shown, the hyperstatic tape measure hinge further includes a stopper assembly 700. The fixed flap 100 and the movable flap 200 are respectively provided with a stopper mounting hole 650 for accommodating the stopper assembly 700. The stopper mounting hole 650 can be directly provided on the fixed flap 100 or the movable flap 200, or can be provided on a protrusion or a fixed block fixedly connected to the fixed flap 100 or the movable flap 200.

[0088] When the first measuring tape 310 and the second measuring tape 320 are located on the same side of the rotation axis of the rotary locking assembly 500, the stopper assembly 700 can pass through the stopper installation hole 650 and extend into the top groove of the fixed flap 100 or the top groove of the movable flap 200, and be plugged into the movable member 810 to lock the movable member 810. By means of the stopper assembly 700, when the first measuring tape 310 and the second measuring tape 320 are located on the same side of the rotation axis of the rotary locking assembly 500, the movable member 810 can be locked, and the second measuring tape 320 can be kept at the position with the movable member 810. The movable assembly 800 moves along the thickness direction of the tape measure hinge so that the first measuring tape 310 and the second measuring tape 320 are located on the same side of the rotation axis of the rotary locking assembly 500.

[0089] Alternatively, see Fig.10 As shown, the stop assembly 700 includes a stop pin 710 and a stop elastic member 720 .

[0090] The head end of the stop pin 710 is disposed in the stop mounting hole 650 , and the stop pin 710 can move in the stop mounting hole 650 .

[0091] The stop pin 710 can pass through the stop mounting hole 650 and extend into the top groove of the fixed flap 100 or the top groove of the movable flap 200, and be inserted into the movable part 810 to lock the movable part 810; that is, when the first tape measure 310 and the second tape measure 320 are located on the same side of the rotation axis of the rotation locking assembly 500, the stop pin 710 can lock the movable part 810.

[0092] The stop elastic member 720 is sleeved on the stop pin 710 , and the stop elastic member 720 has a tendency to make the stop pin 710 away from the movable member 810 ; that is, the stop elastic member 720 has a tendency to make the stop pin 710 extend out of the stop mounting hole 650 .

[0093] Optionally, the stop elastic member 720 is a spring or other elastic member. Optionally, the stop elastic member 720 is always in a compressed state to drive the stop pin 710 to have a tendency to move away from the movable member 810.

[0094] Alternatively, see Fig.10 As shown, the stop assembly 700 further includes a stop rotating shaft 730 and a pulley 740 ; the pulley 740 is pinned to the tail end of the stop pin 710 via the stop rotating shaft 730 , so that the pulley 740 can rotate around the stop rotating shaft 730 .

[0095] The pulley 740 can abut against the rotary locking assembly 500 ; through the pulley 740 , the friction force between the stop assembly 700 and the rotary locking assembly 500 can be reduced to a certain extent.

[0096] Optionally, the stop pin 710 is provided with a stop pin stop portion 711 for preventing the stop pin 710 from being separated from the fixed flap 100 or the movable flap 200 ; the stop pin stop portion 711 prevents the stop pin 710 from being separated from the fixed flap 100 or the movable flap 200 .

[0097] Optionally, the stopping elastic member 720 is disposed between the stopping pin stopping portion 711 and the head end of the stopping pin 710 .

[0098] In the optional solution of this embodiment, see Figure 7-Figure 9 As shown, the swivel locking assembly 500 includes a first swivel shaft 510 , a second swivel shaft 520 , a swivel pin 530 , a first stop rod 540 and a second stop rod 550 .

[0099] One end of the first rotating shaft 510 is hinged to one end of the second rotating shaft 520 through a rotating pin 530; the axis of the rotating pin 530 is the rotating axis; the first rotating shaft 510 and the second rotating shaft 520 can rotate around the rotating pin 530. Optionally, to ensure that the rotating pin 530 does not fall off during the rotation process, a retaining ring is connected to the end of the rotating pin 530.

[0100] The other end of the first rotating shaft 510 is fixedly connected to the movable flap 200; for example, the first rotating shaft 510 and the movable flap 200 are fixedly connected by screws, gluing, welding, clamping, etc.

[0101] The other end of the second rotating shaft 520 is fixedly connected to the fixed flap 100; for example, the second rotating shaft 520 and the fixed flap 100 are fixedly connected by means of screws, gluing, welding, clamping, etc.

[0102] The first shift lever 540 is disposed in the first rotating shaft 510 , and the second shift lever 550 is disposed in the second rotating shaft 520 .

[0103] When the tape measure hinge is in the unfolded state, the head end of the second stop rod 550 can be plugged into the tail end of the first stop rod 540 to lock the first rotating shaft 510 and the second rotating shaft 520, so that the first rotating shaft 510 cannot rotate relative to the second rotating shaft 520. This can not only ensure that the tape measure hinge has higher rigidity after unfolding, but also make the tape measure hinge in a more stable state, and also increase the application range of the tape measure hinge to a certain extent.

[0104] Optionally, in order to facilitate the plugging of the second blocking rod 550 with the first blocking rod 540 , the side surface of the plugging portion of the second blocking rod 550 is a conical surface, and the first blocking rod 540 is provided with a plugging hole that cooperates with the second blocking rod 550 .

[0105] In this embodiment, the second blocking rod 550 includes a corresponding head end and tail end, and the first blocking rod 540 includes a corresponding head end and tail end.

[0106] In the optional solution of this embodiment, see Figure 2 As shown, the pulley 740 configured to move with the stop pin 710 can extend out of the fixed flap 100 or the movable flap 200, and has a gap between the tail end of the second stop rod 550 or the head end of the first stop rod 540; that is, the pulley 740 can extend out of the fixed flap 100 and can abut the tail end of the second stop rod 550, and the other pulley 740 can extend out of the movable flap 200 and can abut the head end of the first stop rod 540. For example, when the hinge of the tape measure is changed from a folded state to an unfolded state, the head end of the second baffle rod 550 moves toward the tail end of the first baffle rod 540 driven by the second elastic member 570, and the tail end of the first baffle rod 540 moves toward the head end of the second baffle rod 550 driven by the first elastic member 560. Thereafter, the stop elastic member 720 drives the stop pin 710 away from the movable member 810 and makes the pulley 740 extend out of the fixed flap 100 or the movable flap 200; the first rotating shaft 510 and the second rotating shaft 520 remain in a locked state driven by the first elastic member 560 and the second elastic member 570.

[0107] In the optional solution of this embodiment, see Figure 8As shown, the first gear rod 540 is covered with a first elastic member 560; the first elastic member 560 is configured to drive the first gear rod 540 to have a tendency to extend out of the first rotating shaft 510, that is, the tail end of the first gear rod 540 has a tendency to move toward the head end of the second gear rod 550 under the drive of the first elastic member 560, so that the second gear rod 550 can be plugged into the first gear rod 540, thereby locking the first rotating shaft 510 and the second rotating shaft 520.

[0108] Optionally, the second gear rod 550 is covered with a second elastic member 570; the second elastic member 570 is configured to drive the second gear rod 550 to have a tendency to extend out of the second rotating shaft 520, that is, the head end of the second gear rod 550 has a tendency to move toward the tail end of the first gear rod 540 under the drive of the second elastic member 570, so that the second gear rod 550 can be plugged into the first gear rod 540, thereby locking the first rotating shaft 510 and the second rotating shaft 520.

[0109] When the hinge of the measuring tape is in the unfolded state, the first stopper 540 driven by the first elastic member 560 is plugged into the second stopper 550 driven by the second elastic member 570, and the first rotating shaft 510 and the second rotating shaft 520 are kept in a locked state.

[0110] Optionally, the first stop rod 540 is provided with a stop structure to prevent itself from being separated from the first rotating shaft 510; the stop structure is, for example, a protrusion or a protruding ring provided on the first stop rod 540, or other structures capable of stopping.

[0111] Optionally, the second stopper 550 is provided with a stopper structure to prevent the second stopper from being separated from the second rotary shaft 520. The stopper structure is, for example, a protrusion or a protruding ring provided on the second stopper 550, or other structures capable of stopping.

[0112] Optionally, the swivel locking assembly 500 is disposed on one side or both sides of the fixed flap 100 along the width direction of the tape measure hinge.

[0113] Optionally, there are two rotary locking assemblies 500; rotary locking assemblies 500 are provided on both sides of the fixed flap 100; by providing rotary locking assemblies 500 on both sides of the fixed flap 100, the jamming phenomenon of the hinge of the tape measure when unfolding can be reduced or avoided.

[0114] In the optional solution of this embodiment, see Fig.12 As shown, the movable member 810 includes a movable supporting member 811 , a movable pressing member 812 and a movable stopper 813 ; the second measuring tape 320 is fixed between the movable supporting member 811 and the movable pressing member 812 .

[0115] Optionally, a movable pressing member 812 is provided between the second measuring tape 320 and the movable stopper 813 .

[0116] Optionally, the movable stopper 813 is provided with a movable stopper groove 814 that cooperates with the stopper pin 710. The stopper pin 710 is plugged into the movable stopper groove 814 to lock the movable member 810, thereby locking the movable assembly 800, so that the rotation axis of the rotary locking assembly 500 is locked between the first tape measure piece 310 and the second tape measure piece 320, thereby placing the tape measure hinge in a hyperstatic state. In this embodiment, the movable stopper groove 814 can be a through hole, a blind hole or a bevel, or other structures.

[0117] Alternatively, see Fig.11 As shown, a guide pin 660 cooperating with the movable part 810 is provided in the top groove of the fixed flap 100 or the top groove of the movable flap 200; a guide pin elastic part 670 is provided on the outer sleeve of the guide pin 660; the guide pin elastic part 670 has a tendency to make the movable part 810 move away from the fixed flap 100 or the movable flap 200; that is, the guide pin elastic part 670 has a tendency to make the movable part 810 rise; through the guide pin elastic part 670, when the tape measure hinge is turned from a folded state to an unfolded state, the movable part 810 can move and drive the rotation axis of the rotary locking assembly 500 to be located on the same side of the first tape measure piece 310 and the second tape measure piece 320.

[0118] Optionally, the movable pressing member 812 and the movable stopper 813 are integrally formed, or the movable pressing member 812 and the movable stopper 813 are detachably and fixedly connected.

[0119] Optionally, the guide pin 660 includes a guide cone portion 662 that cooperates with the movable clamping member 812; the guide cone portion 662 is in a frustum shape, and the small-section end of the guide cone portion 662 is located below the large-section end of the guide cone portion 662. The guide pin 660 and the movable clamping member 812 are matched with each other using a conical surface, so as to ensure that the movable assembly 800 and the guide pin 660 are completely fitted under the action of the guide pin elastic member 670 after the tape measure hinge is unfolded, thereby reducing the matching gap and increasing the rigidity of the tape measure hinge.

[0120] Optionally, the maximum cross-sectional area of ​​the guide cone portion 662 is greater than the maximum cross-sectional area of ​​the corresponding hole of the movable clamping member 812 ; to prevent the movable clamping member 812 from detaching from the guide cone portion 662 , that is, to prevent the movable clamping member 812 from detaching from the guide pin 660 .

[0121] Optionally, the guide pin 660 also includes a guide threaded portion 661 that is threadedly connected to the fixed flap 100 or the movable flap 200; the guide threaded portion 661 is fixedly connected to the bottom end of the guide conical portion 662; optionally, a top groove protrusion that is threadedly connected to the guide threaded portion 661 is provided in the top groove of the fixed flap 100 or the top groove of the movable flap 200, so that the threaded connection between the guide pin 660 and the fixed flap 100 or the movable flap 200 is more secure.

[0122] Optionally, the guide pin 660 further includes a guide straight section 663; the guide straight section 663 is fixedly connected to the top of the guide conical portion 662; and the guide straight section 663 is provided with mutually parallel planes. By providing mutually parallel planes on the guide straight section 663, it is convenient to tighten the guide pin 660 and fix the guide pin 660 on the top groove of the fixed flap 100 or the top groove of the movable flap 200.

[0123] In the optional solution of this embodiment, see Figure 1-Figure 4 As shown, the hyperstatic tape measure hinge further includes a pressing member 400 .

[0124] The fixed flap 100 is fixedly connected to the pressing piece 400 so that one end of the first measuring tape 310 is fixed between the fixed flap 100 and the pressing piece 400 ; the first measuring tape 310 is firmly fixed to the fixed flap 100 through the pressing piece 400 .

[0125] The movable flap 200 is fixedly connected to the pressing member 400 so that the other end of the first measuring tape 310 is fixed between the movable flap 200 and the pressing member 400. The first measuring tape 310 is firmly fixed to the movable flap 200 through the pressing member 400.

[0126] In the optional solution of this embodiment, the structures of the fixed flap 100 and the movable flap 200 may be the same or different. Optionally, the fixed flap 100 and / or the movable flap 200 is a fixed seat 600; that is, the fixed flap 100 or the movable flap 200 is a fixed seat 600, or both the fixed flap 100 and the movable flap 200 are fixed seats 600.

[0127] In the optional solution of this embodiment, see Figure 5 and Figure 6 As shown, the fixed seat 600 includes a seat body 610; the seat body 610 is provided with a fixed seat arc surface portion 620; the number of the fixed seat arc surface portions 620 is the same as the number of the first measuring tape pieces 310; when the number of the first measuring tape pieces 310 is multiple, the number of the fixed seat arc surface portions 620 is also multiple. Along the width direction of the fixed seat 600, multiple fixed seat arc surface portions 620 are sequentially arranged.

[0128] The first measuring tape 310 is fixed on the fixed seat arc surface 620, that is, the first measuring tape 310 is fixed between the fixed seat arc surface 620 of the seat body 610 and the pressing member 400. The first measuring tape 310 can be better fixed on the fixed seat 600 through the fixed seat arc surface 620, that is, the first measuring tape 310 can be better fixed on the fixed petal 100 or the movable petal 200.

[0129] Optionally, the arc surface of the fixed seat arc surface portion 620 is the same as or similar to the arc surface of the first measuring tape 310 .

[0130] In an optional solution of this embodiment, the pressing member 400 includes a pressing arc surface portion and two pressing plane portions; the two pressing plane portions are fixedly connected by the pressing arc surface portion.

[0131] The compression arc surface portion, the first measuring tape piece 310 and the fixed seat arc surface portion 620 are fixedly connected in sequence to firmly fix the first measuring tape piece 310 between the compression arc surface portion and the fixed seat arc surface portion 620 .

[0132] Optionally, the clamping plane portion is fixedly connected to the base body 610 to further improve the tightness of the connection between the clamping member 400 and the base body 610 to further ensure the firmness of the installation of the first measuring tape 310 .

[0133] Optionally, the first screw passes through the compression arc surface and the first tape measure 310 in sequence, and is screwed with the fixed seat arc surface 620. Optionally, the fixed seat arc surface 620 is provided with a first threaded hole screwed with the first screw.

[0134] Optionally, the second screw passes through the pressing plane portion and is screwed to the seat body 610. Optionally, the seat body 610 is provided with a second threaded hole screwed to the second screw.

[0135] In an optional solution of this embodiment, the fixing seat 600 is provided with a fixing seat flange 630 for fixing connection with an object; the fixing seat flange 630 is used to facilitate the fixing connection of the tape measure hinge with the object.

[0136] Optionally, the fixed seat convex edge 630 is provided with an object mounting hole 631; the object mounting hole 631 further facilitates the fixed connection between the tape measure hinge and the object. Optionally, the object mounting hole 631 is a through hole or a threaded hole, or other holes. Optionally, the number of object mounting holes 631 is multiple. Along the width direction of the tape measure hinge, the multiple object mounting holes 631 are not collinear, so as to improve the firmness of the connection between the fixed seat 600 and the object, that is, to improve the firmness of the connection between the fixed flap 100 or the movable flap 200 and the object.

[0137] In an optional solution of this embodiment, a weight-reducing groove 640 is provided on one side of the seat body 610 away from the fixed seat arc surface 620. Optionally, the notch of the weight-reducing groove 640 faces downward or upward. The weight-reducing groove 640 is used to reduce the weight of the hinge of the tape measure.

[0138] The tape measure hinge, the fixed flap 100 and the movable flap 200 described in this embodiment are respectively connected to the first object and the second object to be unfolded. Since the tape measure sheet 300 has a certain elasticity, it will store a certain elastic force after being folded. When the first object and the second object need to be unfolded, the tape measure hinge is unfolded under the action of the tape measure sheet 300. Since the tape measure sheet 300 has a certain flexibility, it has no fixed rotation axis during the unfolding process. In order to fix the unfolding trajectory of the unfolded object, a rotation locking assembly 500 is designed in the tape measure hinge described in this embodiment, which provides a rotation axis for the tape measure hinge and can be locked after the unfolding is completed, providing a certain rigidity for the tape measure hinge. The movable component 800 can be moved along the thickness direction of the tape measure hinge so that the first tape measure piece 310 and the second tape measure piece 320 are located on the same side of the rotation axis of the rotary locking component 500, so that the movable flap 200 can rotate around the rotation axis of the rotary locking component 500 relative to the fixed flap 100, so that the tape measure hinge can be folded; after the rotary locking component 500 is unfolded and locked, the rotary locking component 500 and the tape measure piece 300 can form a hyperstatic structure, thereby increasing the stiffness of the tape measure hinge in the unfolding or folding direction.

[0139] For example, when the hinge of the tape measure needs to be folded, the movable assembly 800 is pushed so that the stop pin 710 can pass through the stop mounting hole 650 and extend into the top groove of the fixed flap 100 or the top groove of the movable flap 200, and be inserted into the movable part 810 to lock the movable part 810, that is, the stop pin 710 is inserted into the movable block groove 814 of the movable block 813 to lock the movable part 810, thereby locking the movable assembly 800 and limiting the movable part 810 from popping out along the guide pin 660; at the same time, the rotary lock 810 is pulled. The first stop rod 540 and the second stop rod 550 in the tightening assembly 500 are respectively in contact with the pulley 740 in the stop assembly 700, and limit the stop assembly 700 from being disengaged from the movable assembly 800 under the action of the stop elastic member 720. At this time, the axis of the second measuring tape 320 in the movable assembly 800 along the length direction passes over the rotation axis in the rotary locking assembly 500, that is, the first measuring tape 310 and the second measuring tape 320 are located on the same side of the rotation axis of the rotary locking assembly 500, and the measuring tape hinge can be folded at this time.

[0140] For example, when the tape measure hinge needs to be unfolded, the tape measure hinge can unfold automatically under the elastic force of the tape measure sheet 300. After unfolding to the full extent, the first stop rod 540 and the second stop rod 550 in the rotary locking assembly 500 are respectively locked under the action of the first elastic member 560 and the second elastic member 570, and disengage from the abutting pulley 740. The stop assembly 700 pushes the stop pin 710 to move under the action of the stop elastic member 720, and disengages the stop pin 710 from the movable stop block groove 814 in the movable assembly 800. The movable assembly 800 pops out along the guide pin 660 under the action of the guide pin elastic member 670. At this time, the rotary locking assembly 500, the first tape measure sheet 310 and the second tape measure sheet 320 formed after the tape measure hinge is unfolded can form a hyperstatic structure, thereby increasing the stiffness of the tape measure hinge in the unfolding or folding direction.

[0141] The tape measure hinge described in this embodiment rotates around the axis of the swivel pin 530 of the swivel locking assembly 500. Since the tape measure piece 300 has a certain flexibility, it can undergo elastic deformation during the folding process. At the same time, the tape measure piece 300 can store a certain elastic potential energy during the elastic deformation process. Relying on the elastic potential energy of the tape measure piece 300, the tape measure can unfold automatically after the hinge is released.

[0142] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hyperstatic tape measure hinge, characterized in that: The measuring tape hinge comprises a fixed flap (100), a movable flap (200), a measuring tape sheet (300), a rotary locking assembly (500), and movable parts (810) arranged in pairs; Among the movable parts (810) arranged in pairs, one of the movable parts (810) can be slidably arranged in a top groove of the fixed flap (100), and the other movable part (810) can be slidably arranged in a top groove of the movable flap (200); The measuring tape (300) comprises a first measuring tape (310) and a second measuring tape (320); the arc surface of the first measuring tape (310) and the arc surface of the second measuring tape (320) are opposite to or opposite to each other; The first measuring tape (310) is fixedly connected between the fixed flap (100) and the movable flap (200); the second measuring tape (320) is fixedly connected between the movable parts (810) arranged in pairs; wherein the movable parts (810) arranged in pairs and the corresponding second measuring tape (320) form a movable assembly (800); One end of the rotary locking assembly (500) is connected to the fixed flap (100), and the other end is connected to the movable flap (200); the movable flap (200) is configured to rotate relative to the fixed flap (100) around the rotary axis of the rotary locking assembly (500); The movable assembly (800) is capable of moving along the thickness direction of the tape measure hinge, so that the first tape measure piece (310) and the second tape measure piece (320) are located on the same side of the rotation axis of the rotation locking assembly (500); When the tape measure hinge is in an unfolded state, along the thickness direction of the tape measure hinge, the rotation axis of the rotation locking assembly (500) is located between the first tape measure piece (310) and the second tape measure piece (320), so that the tape measure hinge is in a hyperstatic state; The rotary locking assembly (500) comprises a first rotary shaft (510), a second rotary shaft (520), a rotary pin (530), a first stop rod (540) and a second stop rod (550); One end of the first rotating shaft (510) and one end of the second rotating shaft (520) are hingedly connected via the rotating pin (530); the axis of the rotating pin (530) is the rotating axis; The other end of the first rotating shaft (510) is fixedly connected to the movable flap (200); the other end of the second rotating shaft (520) is fixedly connected to the fixed flap (100); The first blocking rod (540) is arranged in the first rotating shaft (510), and the second blocking rod (550) is arranged in the second rotating shaft (520); When the measuring tape hinge is in an unfolded state, the head end of the second stop rod (550) can be plugged into the tail end of the first stop rod (540) to lock the first rotating shaft rod (510) and the second rotating shaft rod (520).

2. The hyperstatic tape measure hinge according to claim 1, characterized in that: Also included is a stopper assembly (700); The fixed flap (100) and the movable flap (200) are respectively provided with a stopper mounting hole (650) for accommodating the stopper assembly (700); When the first measuring tape (310) and the second measuring tape (320) are located on the same side of the rotation axis of the rotation locking assembly (500), the stop assembly (700) can pass through the stop mounting hole (650) and extend into the top groove of the fixed flap (100) or the top groove of the movable flap (200), and be plugged into the movable part (810) to lock the movable part (810).

3. The hyperstatic tape measure hinge according to claim 2, characterized in that: The stop assembly (700) comprises a stop pin (710) and a stop elastic member (720); The head end of the stop pin (710) is arranged in the stop mounting hole (650), and the stop pin (710) can pass through the stop mounting hole (650) and extend into the top groove of the fixed flap (100) or the top groove of the movable flap (200), and be inserted into the movable part (810) to lock the movable part (810); The stop elastic member (720) is disposed on the stop pin (710), and the stop elastic member (720) has a tendency to move the stop pin (710) away from the movable member (810).

4. The hyperstatic tape measure hinge according to claim 3, characterized in that: The stopper assembly (700) further comprises a stopper rotating shaft (730) and a pulley (740); the pulley (740) is pin-connected to the tail end of the stopper pin (710) via the stopper rotating shaft (730); The pulley (740) is capable of abutting against the rotary locking assembly (500); the stop pin (710) is provided with a stop pin stop portion (711) for preventing the stop pin from being separated from the fixed flap (100) or the movable flap (200); the stop elastic member (720) is provided between the stop pin stop portion (711) and the head end of the stop pin (710); The stopping elastic member (720) is a spring; the stopping elastic member (720) is always in a compressed state.

5. The hyperstatic tape measure hinge according to claim 4, characterized in that: When the measuring tape hinge is in an unfolded state, the pulley (740) is configured to move with the stop pin (710), can extend out of the fixed flap (100) or the movable flap (200), and has a gap between the rear end of the second stop rod (550) or the front end of the first stop rod (540); The first baffle rod (540) is covered with a first elastic member (560); the first elastic member (560) is configured to drive the first baffle rod (540) to have a tendency to extend out of the first rotating shaft (510); the second baffle rod (550) is covered with a second elastic member (570); the second elastic member (570) is configured to drive the second baffle rod (550) to have a tendency to extend out of the second rotating shaft (520); when the measuring tape hinge is in an unfolded state, the first baffle rod (540) driven by the first elastic member (560) is plugged into the second baffle rod (550) driven by the second elastic member (570), and the first rotating shaft (510) and the second rotating shaft (520) are kept in a locked state; The first blocking rod (540) is provided with a stopper structure for preventing the first blocking rod (540) from separating from the first rotating shaft (510); The second blocking rod (550) is provided with a stop structure for preventing itself from being separated from the second rotating shaft rod (520).

6. The hyperstatic tape measure hinge according to claim 3, characterized in that: The movable part (810) comprises a movable support part (811), a movable pressing part (812) and a movable stopper (813); the second measuring tape (320) is fixed between the movable support part (811) and the movable pressing part (812), and the movable pressing part (812) is arranged between the second measuring tape (320) and the movable stopper (813); the movable stopper (813) is provided with a movable stopper groove (814) cooperating with the stopper pin (710); the stopper pin (710) and the movable stopper groove (814) are plugged into each other, so that the rotary axis of the rotary locking assembly (500) is locked between the first measuring tape (310) and the second measuring tape (320), thereby placing the measuring tape hinge in a hyperstatic state; A guide pin (660) cooperating with the movable part (810) is disposed in the top groove of the fixed flap (100) or the top groove of the movable flap (200); a guide pin elastic part (670) is disposed on the outer sleeve of the guide pin (660); and the guide pin elastic part (670) has a tendency to move the movable part (810) away from the fixed flap (100) or the movable flap (200).

7. The hyperstatic tape measure hinge according to claim 6, characterized in that: The movable pressing member (812) and the movable stopper (813) are integrally formed, or the movable pressing member (812) and the movable stopper (813) are detachably and fixedly connected; The guide pin (660) comprises a guide cone portion (662) cooperating with the movable pressing member (812); the guide cone portion (662) is in a frustum shape, and the small cross-section end of the guide cone portion (662) is located below the large cross-section end of the guide cone portion (662); the maximum cross-sectional area of ​​the guide cone portion (662) is greater than the maximum cross-sectional area of ​​the corresponding hole of the movable pressing member (812); The guide pin (660) further comprises a guide threaded portion (661) threadedly connected to the fixed flap (100) or the movable flap (200); the guide threaded portion (661) is fixedly connected to the bottom end of the guide conical portion (662); The guide pin (660) further comprises a guide straight section (663); the guide straight section (663) is fixedly connected to the top end of the guide conical portion (662); and the guide straight section (663) is provided with planes parallel to each other.

8. The hyperstatic tape measure hinge according to any one of claims 1 to 7, characterized in that: Also includes a pressing member (400); The fixing flap (100) is fixedly connected to the pressing piece (400), so that one end of the first measuring tape (310) is fixed between the fixing flap (100) and the pressing piece (400); The movable flap (200) is fixedly connected to the pressing piece (400), so that the other end of the first measuring tape (310) is fixed between the movable flap (200) and the pressing piece (400).

9. The hyperstatic tape measure hinge according to claim 8, characterized in that: The fixed flap (100) and / or the movable flap (200) is a fixed seat (600); The fixed seat (600) comprises a seat body (610); a fixed seat arc surface portion (620) is provided on the seat body (610); the number of the fixed seat arc surface portions (620) is the same as the number of the first measuring tape pieces (310); The first measuring tape (310) is fixed on the arc surface portion (620) of the fixing seat; The pressing member (400) comprises a pressing arc portion and two pressing plane portions; the two pressing plane portions are fixedly connected via the pressing arc portion; the pressing arc portion, the first measuring tape (310) and the fixed seat arc portion (620) are fixedly connected in sequence; and the pressing plane portion is fixedly connected to the seat body (610).

10. The hyperstatic tape measure hinge according to claim 9, characterized in that: The fixing seat (600) is provided with a fixing seat flange (630) for fixing connection with an object; the fixing seat flange (630) is provided with an object mounting hole (631); A weight-reducing groove (640) is provided on a surface of the seat body (610) away from the fixed seat arc surface portion (620); Along the width direction of the measuring tape hinge, the rotary locking assembly (500) is arranged on one side or both sides of the fixed flap (100); The number of the first measuring tape pieces (310) is two, the number of the second measuring tape piece (320) is one, and one second measuring tape piece (320) is located between the two first measuring tape pieces (310).

Images