CN211227633U - Sewing auxiliary mechanism and sewing machine - Google Patents

Abstract

The utility model discloses a sewing complementary unit, include: a housing; the manual reversing valve is fixedly connected to the shell and comprises a valve body and a valve core arranged in the valve body in a sliding mode, a return spring is arranged between the valve core and the valve body, a first pressing portion capable of acting on the valve core is arranged on the manual reversing valve, and the first pressing portion can push the valve core under the action of external force to enable the valve core to overcome the elastic force of the return spring and slide relative to the valve body; the pressing component is provided with a locking state and an unlocking state and is arranged in the shell, a through hole is formed in the shell corresponding to the first pressing portion, the pressing component acts on the first pressing portion through the through hole in the locking state and can block the valve core from resetting, the pressing component releases acting force on the first pressing portion in the unlocking state, and the valve core resets under the action of elastic force of the reset spring and drives the first pressing portion to reset. Need not the user and continuously presses first splenium of pressing, the operation of being convenient for, and be favorable to reducing user's intensity of labour.

Description

Sewing auxiliary mechanism and sewing machine

Technical Field

The utility model relates to a sewing machine field, in particular to sewing complementary unit and sewing machine.

Background

A manual reversing valve is a directional control valve with a push lever for operating the position change of a valve core, and is mainly divided into a rotary type, a pulling type and a pressing type in the prior art, wherein the pressing portion which can act on the valve core movably arranged in the valve body is arranged on the manual reversing valve of the pressing type, a return spring is arranged between the valve core and the valve body, when the pressing portion is pressed by the outside, the valve core in the valve body can overcome the elastic force of the return spring under the action of the pressing portion to slide relative to the valve body so as to realize the reversing, and when the pressing portion is not pressed by the outside, the valve core in the valve body resets under the elastic force of the return spring and drives the pressing portion to reset.

However, when the conventional push-type manual directional valve is shifted, the elastic force of the return spring needs to be overcome, so that a user needs to continuously push the pressing part, great inconvenience is caused to the user in the use process, and the labor intensity of the user is increased.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a sewing complementary unit convenient to manual switching-over valve switching-over.

The utility model discloses still provide a sewing machine who has above-mentioned sewing complementary unit.

According to the utility model discloses a sewing complementary unit of first aspect embodiment includes:

a housing;

the manual reversing valve is fixedly connected to the shell and comprises a valve body and a valve core arranged in the valve body in a sliding mode, a return spring is arranged between the valve core and the valve body, a first pressing portion capable of acting on the valve core is arranged on the manual reversing valve, and the first pressing portion can push the valve core under the action of external force to enable the valve core to overcome the elastic force of the return spring and slide relative to the valve body;

the pressing component is provided with a locking state and an unlocking state and is arranged in the shell, a through hole is formed in the shell corresponding to the first pressing part, the pressing component acts on the first pressing part through the through hole in the locking state and can block the valve core from resetting, the acting force of the pressing component on the first pressing part is relieved in the unlocking state, and the valve core resets under the action of the elastic force of the reset spring and drives the first pressing part to reset.

According to the utility model discloses sewing complementary unit has following beneficial effect at least: through press the subassembly to realize the switching-over of manual switching valve only need press to switch between the locking state and the unblock state of subassembly can, it is right to need not that the user lasts first splenium of pressing presses down, the actual operation of being convenient for, and is favorable to reducing user's intensity of labour.

According to some embodiments of the present invention, the pressing assembly comprises a driving arm, a pressing arm, a driven arm and a pushing arm connected to the middle part of the driving arm, all hinged in the housing;

a limiting notch is formed in the shell, and one end, far away from the hinge, of the driving arm extends out of the shell through the limiting notch;

a transmission gear is arranged between the pressing arm and the driven arm, the transmission gear is rotatably arranged in the shell, a shifting block linked with the transmission gear is sleeved on the transmission gear, one end, far away from the driving arm, of the pushing arm abuts against the tooth socket of the transmission gear, and the driving arm can be driven to push the transmission gear to rotate when rotating;

a plurality of convex parts are uniformly arranged on the peripheral side of the toggle block, a limiting concave position is formed between every two adjacent convex parts, a first abutting part corresponding to the limiting concave position is arranged on the pressing arm, a second abutting part corresponding to the limiting concave position is arranged on the driven arm, a first tension spring is arranged between the pressing arm and the shell, the first abutting part abuts against one side of the toggle block, and the second abutting part abuts against the other side of the toggle block;

one of the first abutting part and the second abutting part abuts against the limiting concave position, and the other abutting part abuts against the convex part;

the hinge joint of the driving arm is provided with a torsion spring, one torsion arm of the torsion spring is abutted against the shell, and the other torsion arm is abutted against the driving arm.

A user inputs power to the pressing component by pressing one end of the driving arm extending out of the shell, the driving arm is stressed to rotate and drives the pushing arm to push the transmission gear to rotate, the transmission gear drives the shifting block to rotate, when the shifting block rotates until the first abutting part abuts against the limiting concave position and the second abutting part abuts against the convex part, the shifting block is in a locking state, the convex part acts on the second abutting part to enable the driven arm to rotate clockwise and act on the first pressing part, so that the valve core overcomes the elastic force of the reset spring and slides relative to the valve body, meanwhile, the shifting block is limited by matching between the first abutting part and the limiting concave position, and when the shifting block rotates until the first abutting part abuts against the convex part and the second abutting part abuts against the limiting concave position, the shifting block is in an unlocking state, the second abutting part is not affected by the acting force of the protruding part any more, so that the driven arm rotates anticlockwise and releases the acting force on the first pressing part, the valve core resets under the action of the elastic force of the reset spring and drives the first pressing part to reset, and meanwhile, the shifting block is limited through the matching between the second abutting part and the limiting concave position; the limiting notch can limit the rotation range of the driving arm, so that the transmission gear only rotates one tooth part at each time, namely, the shifting block can only be switched to an unlocking state or switched to a locking state from the unlocking state at each time, the driving arm receives the action force of the torsion spring after the shifting block finishes rotating and resets, in the whole process, the pressing arm enables the first abutting part to be pressed against the upper part of the shifting block all the time under the action of the first tension spring, and the shifting block can be further limited after the shifting block finishes rotating, so that the stability of the manual reversing valve in the working process is improved.

According to some embodiments of the utility model, the catch arm articulate in the middle part of initiative arm, the catch arm with be equipped with the second extension spring between the initiative arm, make the catch arm is promoting drive gear pivoted in-process can be relative the initiative arm rotates, in order to adapt to drive gear's tooth's socket is at the angle change of rotation in-process.

According to the utility model discloses a some embodiments, the catch arm is kept away from the one end of master arm corresponds drive gear's tooth's socket is equipped with the slope and pushes away the pressure face, makes the catch arm is promoting drive gear pivoted in-process all the time with keep a face contact between the drive gear, be favorable to reducing stress concentration to improve life.

According to some embodiments of the utility model, first butt portion articulate in on the pressure arm, second butt portion articulate in on the pressure arm, first butt portion with second butt portion all is discoid, just spacing concave position is the arc, makes spacing concave position with first butt portion perhaps can laminate completely when second butt portion cooperation is spacing, is favorable to strengthening spacing effect, just the catch arm is promoting when drive gear rotates, first butt portion with second butt portion can rotate in order to reduce resistance when drive gear rotates for whole promotion process is more smooth and easy.

According to the utility model discloses a some embodiments, drive gear's tooth portion corresponds the catch arm is kept away from the one end of initiative arm is equipped with the slope spigot surface, is convenient for the catch arm promotes drive gear rotates.

According to the utility model discloses a some embodiments, the one end fixedly connected with extension arm of articulated department is kept away from to the master arm, according to lever principle, through the extension arm increases the length of master arm can be more laborsaving, is favorable to further reducing user's intensity of labour.

According to the utility model discloses a some embodiments, the catch arm is kept away from the one end of initiative arm is equipped with the fillet, is favorable to preventing the catch arm is promoting drive gear pivoted in-process takes place the card and is dun for whole promotion process is more smooth and easy.

According to the utility model discloses a sewing machine of second aspect embodiment, it includes according to the utility model discloses the sewing complementary unit of above-mentioned first aspect embodiment.

According to the utility model discloses sewing machine has following beneficial effect at least: through press the subassembly to realize the switching-over of manual switching valve only need press to switch between the locking state and the unblock state of subassembly can, it is right to need not that the user lasts first splenium of pressing presses down, the actual operation of being convenient for, and is favorable to reducing user's intensity of labour.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic view of an unlocked state of a hidden extension arm according to an embodiment of the present invention;

fig. 2 is a schematic view of the embodiment of the present invention showing the locked state of the hidden extension arm;

FIG. 3 is an enlarged view of a portion of FIG. 1 at I;

FIG. 4 is an exploded view of the housing, drive gear, dial block and manual diverter valve of an embodiment of the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 4 at II;

fig. 6 is a schematic view of the overall structure of the embodiment of the present invention.

Reference numerals:

the device comprises a shell 10, a through hole 11 and a limiting notch 12;

a manual directional valve 20, a valve body 21, a first pressing portion 22;

the driving arm 30, the torsion spring 31, the elongated arm 32, and the second pressing portion 321;

a pressing arm 40, a first abutting portion 41, a first tension spring 42;

a driven arm 50, a second abutting portion 51;

a push arm 60, a second tension spring 61, an inclined push surface 62;

a transmission gear 70, an inclined guide surface 71;

a toggle block 80, a convex part 81 and a limit concave part 82.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that if an orientation description is referred to, for example, the directions or positional relationships indicated by the upper, lower, front, rear, left, right, etc. are the directions or positional relationships shown on the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the mechanism or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if there are several, greater than, less than, exceeding, above, below, within, etc., the terms, wherein several means are one or more, and several means are two or more, and greater than, less than, exceeding, etc. are understood as not including the number, and above, below, within, etc. are understood as including the number.

In the description of the present invention, if the terms first, second, etc. appear, they are only used for distinguishing technical features, but they are not to be interpreted as indicating or implying relative importance or implying that the number of the indicated technical features is indicated or that the precedence of the indicated technical features is implied.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 and 2, a sewing assist mechanism includes:

a housing 10;

the manual reversing valve 20 is fixedly connected to the housing 10 and located below the housing 10, the manual reversing valve 20 includes a valve body 21 and a valve core (not shown in the figure) slidably disposed in the valve body 21, a return spring (not shown in the figure) is disposed between the valve core and the valve body 21, a first pressing portion 22 capable of acting on the valve core is disposed on the manual reversing valve 20, and the first pressing portion 22 can push the valve core under the action of an external force so that the valve core overcomes the elastic force of the return spring and slides relative to the valve body 21, thereby achieving reversing of the manual reversing valve 20;

the pressing component is provided with a locking state and an unlocking state and is arranged in the shell 10, a through hole 11 is formed in the shell 10 corresponding to the first pressing portion 22, the pressing component acts on the first pressing portion 22 through the through hole 11 in the locking state and can block the valve core from resetting, the acting force of the pressing component on the first pressing portion 22 is relieved in the unlocking state, and the valve core resets under the action of the elastic force of the reset spring and drives the first pressing portion 22 to reset.

The reversing of the manual reversing valve 20 is realized by the pressing component, and only the locking state and the unlocking state of the pressing component need to be switched, so that the first pressing part 22 does not need to be continuously pressed by a user, the manual reversing valve is convenient for actual operation, and the labor intensity of the user is favorably reduced. It should be noted that the manual directional valve 20 is used for controlling the extension and retraction of the hydraulic cylinder assembly or controlling the extension and retraction of the cylinder assembly, and is not limited herein.

Referring to fig. 1, 2, 4 and 5, in some embodiments thereof, the pressing assembly includes a driving arm 30, a pressing arm 40, a driven arm 50 and a pushing arm 60 connected to the middle of the driving arm 30, wherein the driving arm 30, the pressing arm 40 and the driven arm 50 are hinged within the housing 10;

a limiting notch 12 is arranged below the shell 10, and one end of the driving arm 30, which is far away from the hinge joint, extends out of the shell 10 through the limiting notch 12;

a transmission gear 70 is arranged between the pressing arm 40 and the driven arm 50, the transmission gear 70 is rotatably arranged in the shell 10, a toggle block 80 which is linked with the transmission gear 70 is sleeved on the transmission gear 70, one end, far away from the driving arm 30, of the driving arm 60 abuts against the tooth socket of the transmission gear 70, when the driving arm 30 rotates, the driving arm 60 can be driven to drive the transmission gear 70 to rotate, and the transmission gear 70 can drive the toggle block 80 to rotate;

a plurality of convex parts 81 are uniformly arranged on the peripheral side of the toggle block 80, a limit concave position 82 is formed between every two adjacent convex parts 81, a first abutting part 41 corresponding to the limit concave position 82 is arranged on the pressing arm 40, a second abutting part 51 corresponding to the limit concave position 82 is arranged on the driven arm 50, a first tension spring 42 is arranged between the pressing arm 40 and the shell 10, the first abutting part 41 is always abutted to the upper part of the toggle block 80 under the action of the first tension spring 42, the first pressing part 22 is always abutted to the lower part of the driven arm 50 under the action of a return spring, and the second abutting part 51 is always abutted to the lower part of the toggle block 80 under the action of the first pressing part 22;

one of the first abutting part 41 and the second abutting part 51 abuts against the limiting concave position 82, and the other abuts against the convex part 81;

the hinge joint of the driving arm 30 is provided with a torsion spring 31, one torsion arm of the torsion spring 31 abuts against the shell 10, the other torsion arm abuts against the driving arm 30, the driving arm 30 can overcome the rotation of the torsion spring 31 under the action of external force, and the torsion spring 31 can provide elastic force for resetting the driving arm 30.

The user inputs power to the pressing component by pressing one end of the driving arm 30 extending out of the housing 10, the driving arm 30 is forced to rotate and drives the pushing arm 60 to push the transmission gear 70 to rotate, the transmission gear 70 drives the toggle block 80 to rotate, when the toggle block 80 rotates until the first abutting part 41 abuts against the limit concave position 82 and the second abutting part 51 abuts against the convex part 81, the transmission gear is in a locking state, the convex part 81 acts on the second abutting part 51 to enable the driven arm 50 to rotate clockwise and act on the first pressing part 22, so that the valve core overcomes the elastic force of the return spring and slides relative to the valve body 21, meanwhile, the toggle block 80 is limited by the cooperation between the first abutting part 41 and the limit concave position 82, when the toggle block 80 rotates until the first abutting part 41 abuts against the convex part 81 and the second abutting part 51 abuts against the limit concave position 82, the toggle block is in an unlocking state, and the second abutting part 51 is no longer applied by, the driven arm 50 rotates anticlockwise and releases the acting force on the first pressing part 22, the valve core resets under the action of the elastic force of the return spring and drives the first pressing part 22 to reset, and meanwhile, the toggle block 80 is limited through the matching between the second abutting part 51 and the limiting concave position 82; the limit notch 12 can limit the rotation range of the driving arm 30, so that the transmission gear 70 only rotates one tooth portion at a time, that is, the toggle block 80 can only be switched to the unlocking state from the locking state or switched to the locking state from the unlocking state at a time, the driving arm 30 is reset by the acting force of the torsion spring 31 after the toggle block 80 completes rotation, in the whole process, the pressing arm 40 enables the first abutting portion 41 to be pressed above the toggle block 80 all the time under the action of the first tension spring 42, the toggle block 80 can be further limited after the toggle block 80 completes rotation, and the stability of the manual reversing valve 20 in the working process is improved. It should be noted that the driving arm 30 is vertically disposed, and the pressing arm 40, the driven arm 50 and the pushing arm 60 are horizontally disposed.

Referring to fig. 1 and 2, in some embodiments, the push arm 60 is hinged to the middle of the master arm 30, and a second tension spring 61 is disposed between the push arm 60 and the master arm 30, so that the push arm 60 can rotate relative to the master arm 30 during pushing the transmission gear 70 to rotate, so as to adapt to the angle change of the tooth socket of the transmission gear 70 during rotation.

Referring to fig. 1 to 3, in some embodiments, an end of the push arm 60 away from the master arm 30 is provided with an inclined push surface 62 corresponding to a tooth slot of the transmission gear 70, so that the push arm 60 is always in surface contact with the transmission gear 70 in a process of pushing the transmission gear 70 to rotate, which is beneficial to reducing stress concentration and improving service life.

Referring to fig. 1 and 2, in some embodiments, the first abutting portion 41 is hinged to the pressing arm 40, the second abutting portion 51 is hinged to the pressing arm 40, the first abutting portion 41 and the second abutting portion 51 are both disc-shaped, and the limiting concave position 82 is arc-shaped, so that the limiting concave position 82 can be completely attached to the first abutting portion 41 or the second abutting portion 51 in a matched limiting manner, which is beneficial to enhancing a limiting effect, and when the push arm 60 pushes the transmission gear 70 to rotate, the first abutting portion 41 and the second abutting portion 51 can rotate to reduce resistance when the transmission gear 70 rotates, so that the whole pushing process is smoother.

Referring to fig. 1 to 5, in some embodiments, the tooth portion of the transmission gear 70 is provided with an inclined guide surface 71 corresponding to an end of the push arm 60 away from the active arm 30, so that the push arm 60 pushes the transmission gear 70 to rotate.

Referring to fig. 6, in some embodiments, an end of the active arm 30 away from the hinge is fixedly connected with an elongated arm 32, and according to the lever principle, increasing the length of the active arm 30 by the elongated arm 32 can save more labor, which is beneficial to further reduce the labor intensity of the user.

Referring to fig. 6, in some embodiments, one end of the elongated arm 32, which is away from the connection point, is provided with a second pressing portion 321 for applying force to the elongated arm 32, and a surface of the second pressing portion 321 has a buffer layer, so that the buffer layer has a buffering effect, can protect a user, and is beneficial to improving comfort and user experience. The buffer layer may be a rubber layer, a sponge or other flexible materials disposed on the surface of the second pressing portion 321, which is not limited herein.

Referring to fig. 1 to 3, in some embodiments, a rounded corner is formed at an end of the push arm 60 away from the active arm 30, which is beneficial to prevent the push arm 60 from being jammed during the process of pushing the transmission gear 70 to rotate, so that the whole pushing process is smoother.

It should be noted that, in some embodiments, the pressing component may also be a self-locking button, when pressed, the self-locking button presses down and acts on the first pressing portion 22 and keeps a pressed state, and when pressed again, the self-locking button resets and releases the acting force on the first pressing portion 22, where it is to be noted that the structure of the self-locking button is a known technology, for example, a pressing structure of a ball pen or a PUSH-PUSH structure of a PUSH switch of a desktop television, and details are not described here.

A sewing machine comprises the sewing auxiliary mechanism.

The reversing of the manual reversing valve 20 is realized by the pressing component, and only the locking state and the unlocking state of the pressing component need to be switched, so that the first pressing part 22 does not need to be continuously pressed by a user, the manual reversing valve is convenient for actual operation, and the labor intensity of the user is favorably reduced.

In the description of the present specification, if reference is made to the description of "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", and "some examples", etc., it is intended that a particular feature, structure, material, or characteristic described in connection with the embodiment or example be included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (9)

1. A sewing assist mechanism, comprising:

a housing (10);

the manual reversing valve (20) is fixedly connected to the shell (10), the manual reversing valve (20) comprises a valve body (21) and a valve core arranged in the valve body (21) in a sliding mode, a return spring is arranged between the valve core and the valve body (21), a first pressing portion (22) capable of acting on the valve core is arranged on the manual reversing valve (20), and the first pressing portion (22) can push the valve core under the action of external force to enable the valve core to overcome the elastic force of the return spring and slide relative to the valve body (21);

the pressing assembly is provided with a locking state and an unlocking state and is arranged in the shell (10), a through hole (11) is formed in the shell (10) corresponding to the first pressing portion (22), the pressing assembly acts on the first pressing portion (22) through the through hole (11) and can block the valve core from resetting in the locking state, the acting force of the pressing assembly on the first pressing portion (22) is relieved in the unlocking state, and the valve core resets under the action of the elastic force of the reset spring and drives the first pressing portion (22) to reset.

2. A sewing assistance mechanism according to claim 1, wherein the pressing assembly comprises a driving arm (30), a pressing arm (40), a driven arm (50) and a pushing arm (60) connected to the middle of the driving arm (30), all hinged inside the housing (10);

a limiting notch (12) is formed in the shell (10), and one end, far away from the hinge joint, of the driving arm (30) extends out of the shell (10) through the limiting notch (12);

a transmission gear (70) is arranged between the pressing arm (40) and the driven arm (50), the transmission gear (70) is rotatably arranged in the shell (10), a toggle block (80) linked with the transmission gear (70) is sleeved on the transmission gear (70), one end, far away from the driving arm (30), of the pushing arm (60) abuts against the tooth socket of the transmission gear (70), and the pushing arm (60) can be driven to push the transmission gear (70) to rotate when the driving arm (30) rotates;

the peripheral side of the toggle block (80) is uniformly provided with a plurality of protruding parts (81), a limiting concave position (82) is formed between every two adjacent protruding parts (81), the pressing arm (40) is provided with a first abutting part (41) corresponding to the limiting concave position (82), the driven arm (50) is provided with a second abutting part (51) corresponding to the limiting concave position (82), a first tension spring (42) is arranged between the pressing arm (40) and the shell (10), the first abutting part (41) abuts against one side of the toggle block (80), and the second abutting part (51) abuts against the other side of the toggle block (80);

one of the first abutting part (41) and the second abutting part (51) abuts against the limiting concave position (82), and the other one abuts against the convex part (81);

the hinge joint of the driving arm (30) is provided with a torsion spring (31), one torsion arm of the torsion spring (31) abuts against the shell (10), and the other torsion arm abuts against the driving arm (30).

3. A sewing assistance mechanism according to claim 2, wherein the push arm (60) is hinged to the middle of the active arm (30), and a second tension spring (61) is provided between the push arm (60) and the active arm (30).

4. A sewing assist mechanism according to claim 3, wherein an end of the push arm (60) remote from the master arm (30) is provided with an inclined push surface (62) corresponding to a tooth space of the drive gear (70).

5. A sewing assistance mechanism according to claim 2, wherein the first abutment portion (41) is hinged to the presser arm (40), the second abutment portion (51) is hinged to the presser arm (40), the first abutment portion (41) and the second abutment portion (51) are each disc-shaped, and the limit recess (82) is arc-shaped.

6. A sewing assistance mechanism according to claim 2, wherein the teeth of the drive gear (70) are provided with inclined guide surfaces (71) corresponding to the end of the pusher arm (60) remote from the actuator arm (30).

7. A sewing assist mechanism according to claim 2 wherein an elongate arm (32) is fixedly attached to the end of the active arm (30) remote from the hinge.

8. A sewing assist mechanism as claimed in claim 2, wherein the end of the push arm (60) remote from the active arm (30) is rounded.

9. A sewing machine comprising a sewing assistance mechanism according to any one of claims 1 to 8.

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