Bottom thread frame mechanism and splicing machine

Abstract

The utility model relates to a bottom thread stand mechanism and a sewing machine, the bottom thread stand mechanism comprises a bottom thread stand base, a bottom thread stand assembly, a first elastic piece and a switch piece, the bottom thread stand base is used for being fixedly connected with a machine shell, and a bottom thread stand base shaft is arranged on the bottom thread stand base; the bottom line frame assembly is rotationally connected to the bottom line frame seat shaft; the first elastic piece is connected to the bottom line frame assembly in a pre-deformation mode, and the first elastic piece can drive the bottom line frame assembly to rotate on the bottom line frame base shaft towards the top of the machine shell; the switch piece is arranged on the side portion of the machine shell and movably connected with the machine shell, and the switch piece can be matched with the bottom line frame assembly in a clamped mode so that the bottom line frame assembly can be locked to the bottom line frame base. By means of the technical scheme, an operator does not need to rotate the cam to a designated position when threading the bottom thread frame assembly, the threading space is increased, the effect of threading the bottom thread frame assembly conveniently is achieved, in the process, hands of the operator can be prevented from being hit by the upturned bottom thread frame assembly when acting on the switch piece, and the effect of guaranteeing safety is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field related to stitching machines, in particular to a bottom thread frame mechanism and a stitching machine. Background Art

[0002] The stitching machine has two cam thread take-up systems installed in the middle cavity of the machine housing, including the upper decorative thread take-up cam and the lower thread take-up cam and the lower thread frame assembly. The lower thread frame assembly contains four thread holes and a wire dividing groove feature. When the stitching machine is working, the lower thread and the mesh wire need to be passed through the corresponding holes of the two, and then the cam is used to punch the wire to realize the thread take-up function.

[0003] At present, the threading frame assembly in the existing stitching machine is fixed to the casing, which causes the threading hole to be lower than the upper part of the casing, making threading very inconvenient. Therefore, when threading, the cam needs to be rotated to a specified position, and the threading hole is lower than the upper part of the casing, resulting in a relatively small threading space, which is very inconvenient to operate; in addition, if a thread breakage accident occurs, the bottom thread is very likely to be wound around the thread lifting cam, so it is necessary to remove the bottom thread frame assembly, clean the winding, and re-adjust the bottom thread frame position when reinstalling it to avoid the cam hitting the bottom thread frame assembly, which is time-consuming and laborious. Utility Model Content

[0004] In view of this, it is necessary to provide a bottom line frame mechanism and a stitching machine for solving the above-mentioned technical problems.

[0005] A bottom line frame mechanism is installed on a casing; the bottom line frame mechanism comprises:

[0006] A bottom thread frame seat, used for fixedly connecting the housing, and a bottom thread frame seat shaft is arranged on the bottom thread frame seat;

[0007] A bottom line frame assembly, rotatably connected to the bottom line frame seat shaft;

[0008] A first elastic member is connected to the bottom thread frame assembly in a pre-deformed manner, and the first elastic member can drive the bottom thread frame assembly to rotate on the bottom thread frame seat shaft toward the top of the housing;

[0009] The switch member is arranged on the side of the casing and is movably connected to the casing. The switch member can be engaged with the bottom thread frame assembly to lock the bottom thread frame assembly to the bottom thread frame seat.

[0010] It can be understood that, through the above-mentioned structural arrangement, the operator can first act on the switch member to flip up the bottom thread rack assembly, and then thread the flipped bottom thread rack assembly. This makes it unnecessary to rotate the cam to a specified position for threading, and also increases the threading space, which facilitates the threading of the bottom thread rack assembly. In this process, the switch member and the bottom thread rack assembly are arranged on the casing to prevent the operator's hands from being hit by the flipped bottom thread rack assembly when the switch member is acted on, thereby ensuring safety.

[0011] In one embodiment, the switch element is connected to the housing in a plug-in manner;

[0012] Wherein, a bayonet is arranged on the switch member, and the bayonet can pass through the bottom line frame assembly and be engaged with the bottom line frame assembly.

[0013] It can be understood that, through the above-mentioned structural arrangement, the operator can release the lock of the switch member on the bottom line frame assembly on the bottom line frame seat by pressing the switch member, which makes it easier for the operator to operate the switch member.

[0014] In one embodiment, a slot is provided on the bottom line frame assembly, and the slot allows the bayonet to pass through;

[0015] When the switch member is pressed by an external force, the bayonet pin can move in the strip groove driven by the switch member to release the bayonet pin from the bottom frame assembly.

[0016] In one of the embodiments, the bottom line frame mechanism also includes a second elastic member, which is connected to the switch member in a pre-compressed manner, and the second elastic member can push the bayonet pin passing through the slot to move in the slot so that the bayonet pin is engaged with the bottom line frame assembly.

[0017] It can be understood that, through the above-mentioned structural setting, when the operator drives the bottom line frame assembly to flip down, the locking fit between the bayonet pin and the bottom line frame assembly can be automatically achieved, which can further facilitate the operator to thread the bottom line frame assembly.

[0018] In one embodiment, the bayonet includes a connecting plate portion and a hook portion, and the hook portion is vertically connected to the connecting plate portion;

[0019] Wherein, a plane is provided on the switch component, and the connecting plate portion is attached to the plane and connected to the switch component.

[0020] It can be understood that, through the above-mentioned structural arrangement, it is easy to assemble the bayonet pin onto the switch member.

[0021] In one embodiment, the bottom line frame mechanism further includes a rotation limiting member, which can abut against the rotating bottom line frame assembly and is used to limit the rotation angle of the bottom line frame assembly when it rotates under the pushing of the first elastic member.

[0022] It can be understood that, through the above-mentioned structural setting, the operator can control the upward flipping angle of the bottom line frame assembly when threading the thread according to the needs, which can meet the working habits of different operators when threading the bottom line frame assembly.

[0023] In one of the embodiments, the rotation limiting member is movably mounted on the bottom thread holder seat, and the mounting position of the rotation limiting member on the bottom thread holder seat can be adjusted.

[0024] In one embodiment, the rotation limiter is connected to the bottom thread holder seat in a threaded manner.

[0025] It can be understood that, through the above-mentioned structural arrangement, it is convenient for operators to adjust the installation position of the rotation limiter on the bottom thread holder seat.

[0026] In one embodiment, the first elastic member is configured as a torsion spring.

[0027] The present application also seeks to protect a stitching machine, comprising a casing and the above-mentioned bottom thread frame mechanism, wherein the bottom thread frame mechanism is mounted on the casing.

[0028] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0029] The bottom thread rack mechanism and stitching machine for which protection is sought in the present application, through the above-mentioned structural arrangement, make it possible to thread the bottom thread rack assembly without rotating the cam to a specified position, and also increase the threading space, thereby facilitating the threading of the bottom thread rack assembly. In this process, the switch element and the bottom thread rack assembly are arranged on the casing to prevent the operator's hands from being hit by the flipped bottom thread rack assembly when the switch element is actuated, thereby ensuring safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 This is a schematic structural diagram of a bottom line frame mechanism provided in one embodiment of the present application.

[0032] Figure 2 This is a structural schematic diagram of the bottom line frame mechanism provided by one embodiment of the present application from another perspective.

[0033] Figure 3 This is an exploded view of the switch member and the bayonet pin when assembled in this application.

[0034] Figure 4 This is a structural schematic diagram of a stitching machine provided by an embodiment of the present application, wherein the bottom thread frame assembly abuts against the bottom thread frame seat.

[0035] Figure 5 This is a structural schematic diagram of a stitching machine from another perspective provided by an embodiment of the present application, wherein the bottom thread frame assembly abuts against the bottom thread frame seat.

[0036] Figure 6 This is a structural schematic diagram of a stitching machine provided by an embodiment of the present application, wherein the bottom thread frame assembly is flipped up from the bottom thread frame seat.

[0037] Attached to the drawings are: 1000, stitching machine; 100, bottom thread frame mechanism; 10, bottom thread frame seat; 11, bottom thread frame seat shaft; 20, bottom thread frame assembly; 21, groove; 30, first elastic member; 31, torsion spring; 40, switch member; 41, latch; 401, plane; 402, bolt; 411, connecting plate portion; 412, hook portion; 50, second elastic member; 60, rotation limit member; 200, housing; 201, top; 202, side. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] It should be noted that when an element is referred to as being "provided on" another element, it may be directly provided on the other element or there may be a central element. When an element is considered to be "provided on" another element, it may be directly provided on the other element or there may be a central element at the same time. When an element is considered to be "fixed to" another element, it may be directly fixed to the other element or there may be a central element at the same time.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0041] like Figures 3 to 6 As shown, the bottom thread frame mechanism 100 for which protection is sought in the present application is applied to a stitching machine 1000 , and is specifically installed on a housing 200 of the stitching machine 1000 .

[0042] like Figure 1 , Figure 2 As shown, the bobbin frame mechanism 100 provided in one embodiment of the present application includes a bobbin frame seat 10, a bobbin frame assembly 20, a first elastic member 30 and a switch member 40. The bobbin frame seat 10 is used for fixedly connecting the housing 200, and a bobbin frame seat shaft 11 is provided on the bobbin frame seat 10; the bobbin frame assembly 20 is rotatably connected to the bobbin frame seat shaft 11; the first elastic member 30 is connected to the bobbin frame assembly 20 in a pre-deformed manner, and the first elastic member 30 can drive the bobbin frame assembly 20 to rotate on the bobbin frame seat shaft 11 toward the top 201 of the housing 200; the switch member 40 is provided on the side 202 of the housing 200 and is movably connected to the housing 200, and the switch member 40 can be engaged with the bobbin frame assembly 20, and thereby the bobbin frame assembly 20 is locked to the bobbin frame seat 10. It should be noted that the structural composition of the bobbin frame assembly 20 and the way in which the operator threads the bobbin frame assembly 20 can adopt the existing conventional method, which will not be elaborated here.

[0043] As can be seen from the above, when the operator needs to thread the bottom thread rack assembly 20, the operator can first act on the switch member 40 to release the lock of the bottom thread rack assembly 20 on the bottom thread rack seat 10 by the switch member 40, and use the elastic push of the first elastic member 30 on the bottom thread rack assembly 20 to drive the bottom thread rack assembly 20 to rotate on the bottom thread rack seat shaft 11 and turn the bottom thread rack assembly 20 up, and then thread the upturned bottom thread rack assembly 20, so that the threading does not need to rotate the cam to a specified position, and also increases the threading space, which has the effect of facilitating the threading of the bottom thread rack assembly 20. In this process, the switch member 40 and the bottom thread rack assembly 20 are arranged on the casing 200 to prevent the operator's hands from being hit by the upturned bottom thread rack assembly 20 when the switch member 40 is acted on, which has the effect of ensuring safety.

[0044] like Figure 2As shown, the first elastic member 30 is configured as a torsion spring 31, and specifically, the torsion spring 31 can be mounted on the bottom frame seat shaft 11, one end of the torsion spring 31 abuts against the bottom frame assembly 20, and the other end of the torsion spring 31 abuts against the housing 200, so that the torsion spring 31 can provide a rotational force to the bottom frame assembly 20. Of course, in other embodiments, the first elastic member 30 can also be configured as a compression spring.

[0045] like Figure 5 As shown, the switch member 40 is connected to the housing 200 in a plug-in manner; wherein, the switch member 40 is provided with a bayonet pin 41, which can pass through the bottom thread frame assembly 20 and engage with the bottom thread frame assembly 20. In other words, the switch member 40 can engage with the bottom thread frame assembly 20 through the bayonet pin 41, so that the operator can release the lock of the bottom thread frame assembly 20 on the bottom thread frame seat 10 by pressing the switch member 40, which is convenient for the operator to operate the switch member 40. Here, the bottom thread frame assembly 20 is provided with a slot 21, and the slot 21 allows the bayonet pin 41 to pass through, so that when the switch member 40 is pressed by an external force, the bayonet pin 41 can move in the slot 21 driven by the switch member 40 to release the engagement between the bayonet pin 41 and the bottom thread frame assembly 20.

[0046] As preferably, Figures 1 to 3 As shown, the bayonet 41 includes a connecting plate portion 411 and a hook portion 412, and the hook portion 412 is vertically connected to the connecting plate portion 411, and the hook portion 412 and the connecting plate portion 411 can be connected as a whole. Here, a plane 401 is provided on the switch member 40, and the connecting plate portion 411 is attached to the plane 401 and connected to the switch member 40. Specifically, the connecting plate portion 411 of the bayonet 41 can be fixed to the switch member 40 by a connecting member such as a bolt 402, so that the bayonet 41 can be easily assembled to the switch member 40.

[0047] like Figure 1 , Figure 2 As shown, the bobbin frame mechanism 100 further includes a second elastic member 50, which is connected to the switch member 40 in a pre-compressed manner, and the second elastic member 50 can push the bayonet pin 41 passing through the slot 21 to move in the slot 21, so that the bayonet pin 41 and the bobbin frame assembly 20 can be engaged with each other. When the operator drives the bobbin frame assembly 20 to flip down, the bayonet pin 41 and the bobbin frame assembly 20 can be engaged with each other automatically, which can further facilitate the operator to thread the bobbin frame assembly 20. Here, one end of the second elastic member 50 abuts against the housing 200, and the other end of the second elastic member 50 abuts against the bayonet pin 41. Specifically, the second elastic member 50 can be configured as a spring, a bellows, or other rubber sleeves with high elasticity.

[0048] like Figure 1 , Figure 4 and Figure 6 As shown, the bobbin frame mechanism 100 further includes a rotation limiter 60, which can abut against the rotating bobbin frame assembly 20, and is used to limit the rotation angle of the bobbin frame assembly 20 when it rotates under the push of the first elastic member 30. This allows the operator to control the upward flip angle of the bobbin frame assembly 20 when threading the thread according to the needs, so as to meet the operating habits of different operators when threading the bobbin frame assembly 20.

[0049] As preferably, Figure 1 , Figure 4 and Figure 6 As shown, the rotation limiter 60 is movably mounted on the bottom thread holder seat 10, and the mounting position of the rotation limiter 60 on the bottom thread holder seat 10 can be adjusted. Here, the rotation limiter 60 is connected to the bottom thread holder seat 10 in a threaded manner, and the rotation limiter 60 can be configured as a conventional structure such as a bolt or a screw, so that the operator can adjust the mounting position of the rotation limiter 60 on the bottom thread holder seat 10 by screwing the rotation limiter 60, and the rotation limiter 60 can adjust the turning-up angle of the bottom thread holder assembly 20 when turning up. Of course, in other embodiments, the rotation limiter 60 can also be mounted on the bottom thread holder seat 10 in a sliding fit manner, and then the assembly of the rotation limiter 60 on the bottom thread holder seat 10 is limited by a limiting structure.

[0050] In addition, the present application also provides a stitching machine 1000 , including a housing 200 and the above-mentioned bottom thread frame mechanism 100 , wherein the bottom thread frame mechanism 100 is installed on the housing 200 .

[0051] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, appropriate changes and modifications to the above embodiments are within the scope of protection required by the present invention.

Claims

1. A bottom line frame mechanism, mounted on a housing (200); characterized in that: The bottom line frame mechanism (100) comprises: A bottom thread frame seat (10) is used for fixedly connecting to the housing (200), and a bottom thread frame seat shaft (11) is provided on the bottom thread frame seat (10); A bottom thread frame assembly (20) rotatably connected to the bottom thread frame seat shaft (11); A first elastic member (30) is connected to the bottom thread frame assembly (20) in a pre-deformed manner, and the first elastic member (30) is capable of driving the bottom thread frame assembly (20) to rotate on the bottom thread frame seat shaft (11) toward the top (201) of the housing (200); A switch member (40) is arranged on a side portion (202) of the housing (200) and is movably connected to the housing (200); the switch member (40) can be engaged with the bottom thread frame assembly (20) to thereby lock the bottom thread frame assembly (20) onto the bottom thread frame seat (10).

2. The bottom thread holder mechanism according to claim 1, characterized in that: The switch element (40) is connected to the housing (200) in a plug-in manner; Wherein, a bayonet (41) is provided on the switch member (40), and the bayonet (41) can pass through the bottom thread frame assembly (20) and be engaged with the bottom thread frame assembly (20).

3. The bottom thread holder mechanism according to claim 2, characterized in that: The bottom line frame assembly (20) is provided with a slot (21), and the slot (21) allows the bayonet (41) to pass through; When the switch member (40) is pressed by an external force, the bayonet (41) can move in the strip groove (21) driven by the switch member (40) to release the bayonet fit between the bayonet (41) and the bottom frame assembly (20).

4. The bottom thread holder mechanism according to claim 3, characterized in that: The bottom thread frame mechanism (100) further comprises a second elastic member (50), the second elastic member (50) being connected to the switch member (40) in a pre-compressed manner, and the second elastic member (50) being capable of pushing the bayonet (41) passing through the strip groove (21) to move in the strip groove (21), so that the bayonet (41) is engaged with the bottom thread frame assembly (20).

5. The bottom thread holder mechanism according to claim 2, characterized in that: The bayonet (41) comprises a connecting plate portion (411) and a hook portion (412), wherein the hook portion (412) is vertically connected to the connecting plate portion (411); The switch component (40) is provided with a plane (401), and the connecting plate portion (411) is attached to the plane (401) and connected to the switch component (40).

6. The bottom thread holder mechanism according to claim 1, characterized in that: The bottom thread frame mechanism (100) further comprises a rotation limiting member (60), which is capable of abutting against the rotating bottom thread frame assembly (20) and is used to limit the rotation angle of the bottom thread frame assembly (20) when the bottom thread frame assembly (20) rotates under the push of the first elastic member (30).

7. The bottom thread holder mechanism according to claim 6, characterized in that: The rotation limiting member (60) is movably mounted on the bottom thread holder seat (10), and the mounting position of the rotation limiting member (60) on the bottom thread holder seat (10) can be adjusted.

8. The bottom thread holder mechanism according to claim 7, characterized in that: The rotation limiting member (60) is connected to the bottom thread frame seat (10) in a threaded manner.

9. The bottom thread holder mechanism according to claim 1, characterized in that: The first elastic member (30) is configured as a torsion spring (31).

10. A stitching machine, characterized in that: The invention comprises a housing (200) and a bottom line frame mechanism (100) according to any one of claims 1 to 9, wherein the bottom line frame mechanism (100) is mounted on the housing (200).

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