CN219621387U - Hinge assembly and sewing machine - Google Patents

Abstract

The utility model relates to a hinge assembly and a sewing machine, wherein the hinge assembly comprises a first component and a second component, one side of the first component is provided with a hinge plate with a C-shaped structure, the second component comprises a base and a hinge part, the base is provided with a circular arc concave surface, the outer surface of the hinge part is provided with a circular arc convex surface, the base is connected with one side of the hinge part, so that a central shaft corresponding to the circular arc convex surface coincides with a central shaft corresponding to the circular arc concave surface, a hinge groove which is matched with the hinge plate is formed between the circular arc concave surface and the circular arc convex surface, the hinge groove at least penetrates one end of the second component, one side of the hinge groove is provided with an opening, and the first component is rotationally restrained to the second component through the cooperation of the hinge plate and the hinge groove; the hinge assembly does not need to be provided with an independent shaft pin or a corresponding locking structure, so that the structure can be simplified, the assembly process can be greatly simplified, and the assembly efficiency is improved.

Description

Hinge assembly and sewing machine

Technical Field

The utility model relates to the technical field of sewing machines, in particular to a hinge assembly and a sewing machine.

Background

Sewing machines are commonly used sewing devices that typically utilize one or more sewing threads to form one or more stitches on a material to interweave or stitch one or more layers of material; the sewing machine can be used for sewing fabrics such as cotton, hemp, silk, wool, artificial fiber and the like and products such as leather, plastics, paper and the like, and the sewn stitch is neat, beautiful, flat and firm, has high sewing speed, is simple and convenient to use, and has wide application in the sewing industry.

In the prior art, a hinge assembly is generally used to realize rotatable mounting (or called hinging) of the two parts, and a common hinge assembly (such as a hinge) comprises a pair of metal or nonmetal blades connected by a shaft pin, wherein the two blades are respectively connected to the two parts, so that the two parts can rotate relatively. In the existing hinge assembly, the number of the shaft pins is at least one, meanwhile, two blades are respectively provided with round holes (the inner diameter of each round hole is larger than the outer diameter of each shaft pin) for adapting to the shaft pins, when the hinge assembly is assembled, the two blades are required to be placed at proper positions so that the round holes on the two blades correspond to each other, then the shaft pins penetrate into the round holes, and finally corresponding locking structures are required to be arranged for locking the shaft pins so as to prevent the shaft pins from falling out of the round holes, so that the hinge assembly is assembled. The hinge assembly with the structure has the problems of complex structure and complicated assembly process due to the fact that the shaft pin is required to be assembled independently and the shaft pin is required to be locked by the locking structure, so that the hinge assembly is required to be further optimized, the structure is simplified, and the assembly efficiency is improved.

Disclosure of Invention

The utility model provides a hinge component with simpler structure and more convenient assembly, which aims to solve the problems that the prior hinge component is connected with two blades through an independently configured shaft pin, so that the shaft pin is required to be independently assembled during assembly, and a locking structure is required to be configured to lock the shaft pin, and the structure is complex and the assembly process is complicated, and the main conception is that:

a hinge assembly comprising a first part and a second part, wherein one side of the first part is configured with a hinge tab of C-shaped configuration,

the second component comprises a base and a hinging part, wherein the base is provided with a circular arc concave surface, the outer surface of the hinging part is provided with a circular arc convex surface, the base is connected with one side of the hinging part, so that a central shaft corresponding to the circular arc convex surface coincides with a central shaft corresponding to the circular arc concave surface, the central angle corresponding to the circular arc convex surface is larger than the central angle corresponding to the circular arc concave surface, a hinging groove which is matched with the hinging piece is formed between the circular arc concave surface and the circular arc convex surface, the hinging groove at least penetrates through one end of the second component, one side of the hinging groove is provided with an opening,

the first member is rotatably constrained to the second member by engagement of the hinge tab with the hinge slot. In the scheme, a circular arc concave surface is formed on a base of the second component, a circular arc convex surface is formed on the outer surface of the hinge part, and meanwhile, the base is connected with one side of the hinge part so as to fix the relative position relationship between the base and the hinge part, the central axis corresponding to the circular arc convex surface is overlapped with the central axis corresponding to the circular arc concave surface, and a C-shaped hinge groove is formed between the circular arc convex surface and the circular arc concave surface so as to be matched with the first component; the first component is configured, and the hinge plate with the C-shaped structure is constructed on one side of the first component, so that the hinge plate can be matched with the hinge groove, and the problem that the first component and the second component can be matched and installed is solved; meanwhile, in the scheme, the hinge groove of the second part is constructed to penetrate through two ends of the second part, and meanwhile, one side of the hinge groove is provided with an opening; when the hinge plate is inserted into the hinge slot, the first component can be rotatably connected with the second component through the cooperation of the hinge plate and the hinge slot; compared with the existing hinge assembly, the hinge assembly does not need a separate shaft pin or a corresponding locking structure, not only can the structure be simplified, but also the assembly process can be greatly simplified, and the assembly efficiency is improved.

Preferably, the base is connected to a side of the hinge portion by a connection portion. So as to achieve the effect of fixing the hinge.

To solve the problem of facilitating the installation of the present hinge assembly, further, the first part is configured with a first mounting portion for enabling a detachable connection and/or the base is configured with a second mounting portion for enabling a detachable connection. Through configuration first installation department and second installation department for when using, this hinge assembly can be through first installation department and second installation department of reservation, quick, the convenient installation that realizes first part and second part.

Preferably, the first mounting portion is a mounting hole, and the second mounting portion is a mounting hole. So that the removable mounting of the first and second parts is achieved with fasteners that fit into the mounting holes.

In order to solve the problem of being convenient for firmly connecting the hinge assembly, further, the first component is further provided with a first mounting plate, the first mounting part is configured on the first mounting plate, and/or the base is further provided with a second mounting plate, the hinge piece is connected to one side of the second mounting plate, and the second mounting part is configured on the second mounting plate. Through constructing first mounting panel and second mounting panel to utilize first mounting panel and second mounting panel to install first part and second part, can form bigger area of contact, not only can realize more firm installation, be favorable to improving the bearing capacity of this hinge assembly moreover.

Further, a first positioning portion is configured on one side of the first mounting plate, and/or a second positioning portion is configured on the base. By constructing the first positioning part and the second positioning part, the mounting positions of the first part and the second part can be accurately positioned when the first part and the second part are mounted, and the hinge assembly is convenient to mount quickly and accurately.

In order to solve the problem of precisely controlling the rotation angle of the first component, the first component is further provided with a first limiting surface, the second component is provided with a second limiting surface matched with the first limiting surface, and the first component is limited to a first position through the cooperation of the first limiting surface and the second limiting surface;

and/or the first component is configured with a first mating surface, the second component is configured with a second mating surface that mates with the first mating surface, and the first component is restrained in the second position by the mating of the first mating surface with the second mating surface. The rotation range of the first component can be accurately controlled through the cooperation of the first limiting surface and the second limiting surface and the cooperation of the first matching surface and the second matching surface, so that the first component can rotate between the first position and the second position.

Preferably, the angle of rotation of the first member from the first position to the second position is greater than or equal to 90 degrees.

In order to further simplify the structure, a rotating section for the first component to rotate is formed between the second limiting surface and the second matching surface, the hinge groove is communicated with the rotating section through the opening, and an included angle between the second limiting surface and the second matching surface is larger than or equal to 90 degrees. In this scheme, first part can rotate in rotating the interval, and the both ends of rotating the interval are first position and the second position of first part rotation in-process respectively, both are convenient for not only control the rotation angle of first part to be more than or equal to 90 degrees, can further simplify the structure of this hinge assembly again to more be convenient for assemble.

In order to solve the problem of easier use, it is preferable that the first limiting surface and the second limiting surface are respectively configured as horizontal surfaces. Through constructing first spacing face and second spacing face as the horizontal plane respectively, the first part of cooperation again can rotate 90 degrees at least for in practical application, can rotate first part from horizontal position to the position department of crossing vertical direction, make in the second position department, can utilize the gravity of first part self to prevent first part automatic re-setting, need not extra support, make the state after the maintenance rotation that first part can be stable, be particularly useful for occasions such as maintenance, very convenient.

Preferably, the second mating surface is configured on the connecting portion. Is convenient for forming.

In order to solve the problem of realizing more firm connection, further, the hinge plate is constructed to be a strip-shaped structure, the second component is constructed to be a strip-shaped structure matched with the second component, and the hinge groove penetrates through two ends of the second component along the length direction. In the assembled hinge assembly, the hinge plate and the hinge groove have larger matching contact area, so that more firm connection can be realized, and the bearing capacity of the hinge assembly is improved.

Preferably, the difference between the central angle corresponding to the circular arc convex surface and the central angle corresponding to the circular arc concave surface is greater than or equal to 90 degrees. The rotating angle of the first component relative to the second component can be larger than or equal to 90 degrees, in practical application, the first component can be rotated from a horizontal position to a position beyond the vertical direction, the gravity of the first component can be utilized to prevent the first component from automatically resetting, the first component can be stably kept in a rotated state, and the device is particularly suitable for occasions such as overhauling.

To solve the problem of easy molding, further, the first part is an integrally molded member, and/or the second part is an integrally molded member.

A sewing machine includes the hinge assembly.

Compared with the prior art, the hinge assembly and the sewing machine provided by the utility model have the advantages that an independent shaft pin is not required to be arranged, and a corresponding locking structure is not required to be arranged, so that the structure can be simplified, the assembly process can be greatly simplified, and the assembly efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic three-dimensional structure of a first member in a hinge assembly according to embodiment 1 of the present utility model.

Fig. 2 is a front view of fig. 1.

Fig. 3 is a front view of another first component provided in embodiment 1 of the present utility model.

Fig. 4 is a schematic three-dimensional structure of a second member in a hinge assembly according to embodiment 1 of the present utility model.

Fig. 5 is a front view of fig. 4.

Fig. 6 is a front view of another second component provided in embodiment 1 of the present utility model.

Fig. 7 is a schematic three-dimensional structure of a hinge assembly according to embodiment 1 of the present utility model.

Fig. 8 is a front view of fig. 7.

Fig. 9 is a schematic view of a hinge assembly according to embodiment 1 of the present utility model in a first position.

Fig. 10 is a schematic view of a hinge assembly according to embodiment 1 of the present utility model in a second position.

Fig. 11 is a partial schematic view of a sewing machine according to embodiment 2 of the present utility model.

Description of the drawings

First member 100, hinge plate 101, inner surface 102, outer surface 103, first mounting plate 104, first mounting portion 105, first positioning portion 106, first limiting surface 107, first mating surface 108

The second component 200, the base 201, the circular arc concave surface 202, the hinge part 203, the circular arc convex surface 204, the through hole 205, the connecting part 206, the hinge groove 207, the opening 208, the second mounting plate 209, the second mounting part 210, the second positioning part 211, the second limiting surface 212 and the second matching surface 213

Frame 300, movable member 301, and fixed member 302

Fastener 400.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.

Example 1

In this embodiment, a hinge assembly is provided, which includes a first member 100 and a second member 200 that are mutually adapted, wherein one side of the first member 100 is configured with a hinge plate 101 having a C-shaped structure, as shown in fig. 1 and 2, and in practice, the thickness of the hinge plate 101 is preferably configured to be uniform; specifically, as shown in fig. 2, the inner surface 102 of the hinge plate 101 is configured as an arc surface, the outer surface 103 of the hinge plate 101 is also configured as an arc surface, and the central axis corresponding to the inner surface 102 coincides with the central axis corresponding to the outer surface 103.

In this embodiment, the second component 200 includes a base 201 and a hinge portion 203, where the base 201 mainly plays a role in supporting and bearing, the actual shape of the base 201 may be determined according to actual requirements, in this embodiment, the base 201 is configured with a circular arc concave surface 202, as shown in fig. 4 and 5, meanwhile, the outer surface 103 of the hinge portion 203 is configured with a circular arc convex surface 204, as an example, the hinge portion 203 may be configured into a cylindrical structure or a cylindrical structure, as shown in fig. 4, especially when a cylindrical structure is adopted, at this time, the center of the hinge portion 203 is configured with a through hole 205, and the through hole 205 penetrates through two ends of the hinge portion 203, which not only plays a role in weight reduction, but also is beneficial to molding, saving materials and cost.

As shown in fig. 5, in the present embodiment, the base 201 is connected to one side of the hinge portion 203 so as to fix the relative positional relationship between the base 201 and the hinge portion 203, in the present embodiment, the hinge portion 203 is disposed at the center of the circular arc concave surface 202, so that the central axis corresponding to the circular arc convex surface 204 coincides with the central axis corresponding to the circular arc concave surface, as shown in fig. 5, and a hinge groove 207 adapted to the hinge piece 101 is formed between the circular arc concave surface 202 and the circular arc convex surface 204, and the hinge groove 207 has a C-shaped structure; specifically, the spacing between the circular arc concave surface 202 and the circular arc convex surface 204 is larger than the thickness of the hinge plate 101, so that the hinge plate 101 can be fitted into the hinge groove 207 and can be rotated with respect to the hinge groove 207.

In practice, the hinge slot 207 extends through at least one end of the second member 200, and one side of the hinge slot 207 has an opening 208 to facilitate assembly of the first member 100. For example, in the present embodiment, the hinge slot 207 penetrates through both ends of the second member 200, as shown in fig. 4 and 5, since the hinge slot 207 is formed between the circular arc concave surface 202 and the circular arc convex surface 204, one side of the hinge slot 207 may form an opening 208 communicating with the outside, and the other side of the hinge slot 207 is closed by the connection portion 206, as shown in fig. 5, and the base 201 is connected to the side of the hinge portion 203 through the connection portion 206, so as to fix the hinge portion 203.

In operation, the radius of the inner surface 102 of the hinge plate 101 is greater than the radius of the convex arcuate surface 204 in the hinge portion 203 and the radius of the outer surface 103 of the hinge plate 101 is less than the radius of the concave arcuate surface 202 in the hinge portion 203 such that the first member 100 may be rotatably constrained to the second member 200 by the engagement of the hinge plate 101 with the hinge slot 207. In actual assembly, the hinge plate 101 of the first component 100 can be inserted into the hinge slot 207 from one end of the second component 200, as shown in fig. 7 and 8, so that the hinge plate 101 and the hinge slot 207 can be conveniently and rotatably matched, and the problem of complicated assembly of the conventional hinge assembly can be solved; when the hinge plate 101 is inserted into the hinge slot 207, the first part 100 can be rotatably connected with the second part 200 through the cooperation of the hinge plate 101 and the hinge slot 207; compared with the existing hinge assembly, the hinge assembly does not need a separate shaft pin or a corresponding locking structure, not only can the structure be simplified, but also the assembly process can be greatly simplified, and the assembly efficiency is improved.

In this embodiment, the hinge plate 101 is constrained rotatably by the cooperation of the circular arc concave surface 202 and the circular arc convex surface 204, so that the hinge plate 101 can rotate along the circular arc convex surface 204, and therefore, in implementation, the central angle corresponding to the circular arc convex surface 204 is larger than the central angle corresponding to the circular arc concave surface 202, as shown in fig. 5, so that the first component 100 has a larger rotation angle, and the use requirements of different occasions are more satisfied. In practice, the difference between the central angle corresponding to the convex arc 204 and the central angle corresponding to the concave arc 202 may be determined according to actual needs, and in a preferred embodiment, the difference between the central angle corresponding to the convex arc 204 and the central angle corresponding to the concave arc 202 is greater than or equal to 90 degrees, so that the first component 100 can rotate at least 90 degrees, and the rotation requirement from the horizontal position to the over-vertical position can be met, which is especially suitable for the occasion such as overhaul.

As an example, as shown in fig. 5, in the present embodiment, the central angle corresponding to the circular arc concave surface 202 may be controlled to be about 180 degrees, the central angle corresponding to the circular arc convex surface 204 may be controlled to be 270 degrees to 340 degrees, and as an example, as shown in fig. 5, 320 degrees are adopted as the central angle corresponding to the circular arc convex surface 204. In practice, the radian of the hinge plate 101 may be determined according to practical requirements, and in general, the central angle corresponding to the outer surface 103 of the hinge plate 101 may be greater than or equal to the central angle corresponding to the circular arc concave surface 202 and less than the central angle corresponding to the circular arc convex surface 204. For example, in the present embodiment, the central angle corresponding to the outer surface 103 of the hinge plate 101 is about 180 degrees, as shown in fig. 2.

In the present hinge assembly, the first member 100 is configured with the first mounting portion 105 for making a detachable connection, and likewise, the base 201 may also be configured with the second mounting portion 210 for making a detachable connection, so that in use, the present hinge assembly can quickly and conveniently make the mounting of the first member 100 and the second member 200 through the reserved first mounting portion 105 and second mounting portion 210.

In order to facilitate more secure attachment of the present hinge assembly, first member 100 is further configured with a first mounting plate 104, and hinge plate 101 is attached to one side of first mounting plate 104, and first mounting portion 105 is configured with first mounting plate 104. First mounting portion 105 has various embodiments, for example, first mounting portion 105 may be a mounting hole, a mounting post, etc. configured to first mounting plate 104, as shown in fig. 1, and the present embodiment employs a mounting hole, so as to achieve detachable mounting of first component 100 with a fastener 400 (e.g., a bolt pair) that fits into the mounting hole. Similarly, in practice, the base 201 is further configured with a second mounting plate 209, and the second mounting portion 210 may be configured on the second mounting plate 209. The second mounting portion 210 has various embodiments, for example, the second mounting portion 210 may be a mounting hole, a mounting post, or the like configured on the second mounting plate 209, as shown in fig. 4, and the present embodiment uses the mounting hole so as to achieve the detachable mounting of the second component 200 with a fastener 400 (e.g., a bolt pair) that is adapted to the mounting hole. By constructing first mounting plate 104 and second mounting plate 209 and utilizing first mounting plate 104 and second mounting plate 209 to mount first component 100 and second component 200, a larger contact area may be created, which not only may enable a more secure mounting, but also may facilitate an increase in the load carrying capacity of the present hinge assembly.

In a more sophisticated version, as shown in fig. 1 and 2, a first positioning portion 106 is further configured on one side of the first mounting board 104, so that the first positioning portion 106 is used to precisely position the mounting position of the first component 100, which is beneficial for rapid and precise mounting of the first component 100. The first positioning portion 106 has various embodiments, for example, the first positioning portion 106 may be a positioning column, a positioning block, a positioning groove, or the like, as shown in fig. 2, and in this embodiment, the first positioning portion 106 is a strip-shaped positioning protrusion along the length direction of the first mounting board 104. The base 201 is further configured with a second positioning portion 211 so that the second positioning portion 211 is used to precisely position the mounting position of the second member 200, thereby facilitating rapid and precise mounting of the second member 200. The second positioning portion 211 may be configured on the second mounting plate 209 or on the connection portion 206; similarly, the second positioning portion 211 has various embodiments, for example, the second positioning portion 211 may be a positioning column, a positioning block, a positioning groove, or the like, as shown in fig. 4 and 5, and in this embodiment, the second positioning portion 211 is a strip-shaped positioning protrusion along the length direction of the second mounting plate 209.

In order to control the relative rotation angle of the first member 100 and the first member 100, in implementation, the first member 100 is configured with a first limiting surface 107, and the second member 200 is configured with a second limiting surface 212 adapted to the first limiting surface 107, so that the first position (such as the initial position) of the first member 100 can be limited by the cooperation of the first limiting surface 107 and the second limiting surface 212, as shown in fig. 9. The first limiting surface 107 and the second limiting surface 212 have various embodiments, for example, the first limiting surface 107 may be a lower surface of the first mounting board 104 or may be configured on a lower surface of the first mounting board 104, at this time, the second limiting surface 212 may be configured on an upper surface of the base 201, and in implementation, the first limiting surface 107 and the second limiting surface 212 may respectively adopt horizontal planes, as shown in fig. 2 and fig. 5, so that, in the case of implementation, the first component 100 may be stably constrained in a horizontal position (initial position) by cooperation of the first limiting surface 107 and the second limiting surface 212, where the horizontal position is the first position of the first component 100. In addition, in implementation, the first limiting surface 107 may be configured on the hinge plate 101, the second limiting surface 212 may be configured on the connecting portion 206, for example, the first limiting surface 107 may be configured on an upper end of the hinge plate 101, which is far away from the end of the first mounting plate 104, as shown in fig. 3, and the second limiting surface 212 may be configured on the connecting portion 206 and connected to the circular arc concave surface 202 and the circular arc convex surface 204, respectively, as shown in fig. 6, and may perform a limiting function through cooperation of the two surfaces.

In practice, the first component 100 is further configured with a first mating surface 108, while the second component 200 is configured with a second mating surface 213 that mates with the first mating surface 108, such that the second position (e.g., final position) of the first component 100 may be limited by the mating of the first mating surface 108 with the second mating surface 213, as shown in fig. 10. In practice, the second mating surface 213 may be preferentially configured on the connection portion 206, as shown in fig. 4 and 5, and in use, the rotation angle of the first component 100 relative to the second component 200 may be limited by the cooperation of the first mating surface 108 and the second mating surface 213, which may not only play a role in limiting, but also play a role in stably supporting the first component 100 by utilizing the cooperation of the first mating surface 108 and the second mating surface 213. In a preferred embodiment, the first mating surface 108 may be disposed along a radial direction of the circular arc concave surface 202, and the second mating surface 213 may be disposed along a radial direction of the circular arc convex surface 204, as shown in fig. 5, so that the first component 100 may rotate relative to the second component 200 to a position where the second mating surface 213 stops, and the second mating surface 213 may be preferentially located at a position deviating from the vertical direction, so that the first component 100 abutted against the second mating surface 213 is exactly located at a position deviating from the vertical direction, so that gravity of the first component 100 itself may be used to prevent the first component 100 from automatically resetting, so that the first component 100 may stably maintain a rotated state, and is particularly suitable for an occasion such as maintenance.

In practice, the rotation range of the first member 100 may be controlled by the engagement of the first limiting surface 107 with the second limiting surface 212 and the first mating surface 108 with the second mating surface 213, such that the first member 100 may rotate between the first position and the second position, as shown in fig. 8-10. The rotation range of the first member 100 may be determined according to practical requirements, and preferably, the rotation angle of the first member 100 from the first position to the second position may be greater than or equal to 90 degrees. To achieve this, in a simple embodiment, a rotation section for the first member 100 to rotate may be formed between the second limiting surface 212 and the second mating surface 213, as shown in fig. 4 and 5, and the hinge slot 207 may just communicate with the rotation section through the opening 208, so that, on one hand, the assembly of the first member 100 is very convenient, and on the other hand, the first member 100 may rotate in the rotation section, and two ends of the rotation section are respectively a first position and a second position during the rotation of the first member 100, as shown in fig. 8 to 10, which is beneficial to further simplify the structure of the hinge assembly. Meanwhile, the included angle between the second limiting surface 212 and the second mating surface 213 may be greater than or equal to 90 degrees, which is beneficial to setting the rotation angle of the first component 100 to be greater than or equal to 90 degrees. For example, in a preferred embodiment, the included angle between the second limiting surface 212 and the second mating surface 213 is a, a may be preferentially controlled to be greater than or equal to 90 degrees, the central angle corresponding to the portion of the first component 100 between the rotation interval may be controlled to be B, B is smaller than a, and the difference between a and B may be greater than or equal to 90 degrees, so that the rotation angle of the first component 100 may be greater than or equal to 90 degrees, as shown in fig. 5, so that the first component 100 may be rotated by at least 90 degrees, and may meet the rotation requirement from the horizontal position to the position beyond the vertical position, and the method is particularly suitable for maintenance or the like. For example, in the present embodiment, the included angle a between the first limiting surface 107 and the second mating surface 213 may be about 140 degrees, as shown in fig. 7 and 8, the central angle B corresponding to the portion of the first member 100 between the rotation sections is about 40 degrees, and the second limiting surface 212 is configured as a horizontal plane and is located at the same height as the central axis of the circular convex surface 204, so that the rotation angle of the first member 100 is about 100 degrees.

In this embodiment, the hinge plate 101 is configured as an elongated structure, and the length of the hinge plate 101 may be much longer than that of the existing hinge assembly, for example, in this example, the hinge plate 101 preferably has a length greater than 0.2m, and preferably, the hinge plate 101 may have a length of 0.5m, 1.0m, 1.5m, 2.0m, 2.5m, 3.0m, 3.5m, 4.0m, 4.5m, 5.0m, or the like, for example, in this embodiment, the first member 100, including the hinge plate 101 in the first member 100, has a length of 2.5m, as shown in fig. 1. Likewise, the second member 200 may be constructed in an elongated structure adapted thereto, and the hinge grooves 207 may penetrate through both ends of the second member 200 in the length direction, i.e., the length of the second member 200 may be preferably greater than 0.2m, and preferably, the length of the second member 200 may be 0.5m, 1.0m, 1.5m, 2.0m, 2.5m, 3.0m, 3.5m, 4.0m, 4.5m, 5.0m, etc., for example, in the present embodiment, the length of the second member 200 is also 2.5m, as shown in fig. 4. In the assembled hinge assembly, the hinge plate 101 and the hinge groove 207 have larger matching contact area, so that more firm connection can be realized, and the bearing capacity of the hinge assembly is improved.

For ease of molding, in this embodiment, the first part 100 may preferably be an integrally molded member, for example, the first part 100 is an integrally molded aluminum part or plastic part; likewise, the second component 200 may preferably be an integrally formed member, for example, the second component 200 is an integrally formed aluminum component or plastic, and specifically, the hinge 203 and the base 201 are both formed in a long strip shape.

Example 2

The embodiment provides a sewing machine, which comprises the hinge assembly so as to meet the installation requirement of parts which need to be rotatably installed in the sewing machine. For example, the present sewing machine further comprises a frame 300 and a movable member 301, wherein,

the movable component 301 may be a top plate, a cover plate, etc. in a sewing machine, in the existing sewing machine, the movable component 301 is usually detachably mounted on the frame 300, so as to shield devices below the movable component 301, and when maintenance or repair is required, only the whole movable component 301 can be detached, so that the internal devices can be exposed.

In the sewing machine provided in this embodiment, after the above-mentioned hinge assembly is configured, the second component 200 may be fixedly mounted on the frame 300 or the fixed component 302 (such as a fixed cover plate) on the frame 300, as shown in fig. 11, one end of the movable component 301 may be fixedly connected to the first component 100, so that the movable component 301 may act synchronously with the first component 100, while the other end of the movable component 301 may be detachably connected to the frame 300 through the fastener 400 such as a bolt pair, a screw, etc., as shown in fig. 11, so that during maintenance or repair, the constraint on the first component 100 may be released by only removing the connection between one end of the first component 100 and the frame 300, and then the space below the movable component 301 may be conveniently and rapidly exposed by rotating the movable component 301 without detaching the whole movable component 301.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model.

Claims (10)

1. A hinge assembly comprising a first member and a second member, wherein one side of the first member is configured with a hinge tab of C-shaped configuration,

the second component comprises a base and a hinging part, wherein the base is provided with a circular arc concave surface, the outer surface of the hinging part is provided with a circular arc convex surface, the base is connected with one side of the hinging part, so that the central axis corresponding to the circular arc convex surface coincides with the central axis corresponding to the circular arc concave surface, the central angle corresponding to the circular arc convex surface is larger than the central angle corresponding to the circular arc concave surface, a hinging groove which is matched with the hinging piece is formed between the circular arc concave surface and the circular arc convex surface, the hinging groove at least penetrates through one end of the second component, one side of the hinging groove is provided with an opening,

the first member is rotatably constrained to the second member by engagement of the hinge tab with the hinge slot.

2. The hinge assembly of claim 1, wherein the base is connected to a side of the hinge portion by a connection.

3. A hinge assembly according to claim 2, wherein the first part is configured with a first mounting portion for enabling a detachable connection and/or the base is configured with a second mounting portion for enabling a detachable connection.

4. A hinge assembly according to claim 3, wherein the first part is further configured with a first mounting plate, the first mounting portion being configured to the first mounting plate, and/or the base is further configured with a second mounting plate, the hinge tab being connected to one side of the second mounting plate, the second mounting portion being configured to the second mounting plate.

5. The hinge assembly of claim 4, wherein one side of the first mounting plate is configured with a first detent;

and/or the base is configured with a second positioning portion;

and/or the first mounting part is a mounting hole, and the second mounting part is a mounting hole.

6. The hinge assembly of any one of claims 2-5, wherein the first member is configured with a first stop surface and the second member is configured with a second stop surface that mates with the first stop surface to limit the first member to the first position by engagement of the first stop surface with the second stop surface;

and/or the first component is configured with a first mating surface, the second component is configured with a second mating surface that mates with the first mating surface, and the first component is restrained in the second position by the mating of the first mating surface with the second mating surface.

7. The hinge assembly of claim 6, wherein the first member rotates from the first position to the second position by an angle of greater than or equal to 90 degrees.

8. The hinge assembly according to claim 7, wherein a rotation section for the first member to rotate is formed between the second limiting surface and the second mating surface, the hinge groove is communicated with the rotation section through the opening, and an included angle between the second limiting surface and the second mating surface is greater than or equal to 90 degrees;

and/or, the first limiting surface and the second limiting surface respectively adopt horizontal planes;

and/or, the second matching surface is configured on the connecting part.

9. A hinge assembly according to any one of claims 1 to 5, wherein the hinge plate is constructed in an elongated structure, the second member is constructed in an elongated structure adapted thereto, and the hinge slot extends through both ends of the second member in a longitudinal direction;

and/or the difference value between the central angle corresponding to the circular arc convex surface and the central angle corresponding to the circular arc concave surface is greater than or equal to 90 degrees;

and/or the first part is an integrally formed member and/or the second part is an integrally formed member.

10. A sewing machine comprising a hinge assembly according to any one of claims 1-9.