Back-falling forward-sliding-preventing frame and sofa

Abstract

The utility model provides a back-to-back anti-forward sliding frame and sofa, the back-to-back anti-forward sliding frame comprises a base unit, a plurality of stretching units arranged at intervals and a pushing unit used for pushing the stretching units, each stretching unit comprises a first connecting piece and a second connecting piece which are hinged to the base unit, the first connecting piece and the second connecting piece are hinged in a scissor-fork shape, and a third connecting piece is hinged to the end, away from the base unit, of the first connecting piece. A fourth connecting piece is hinged to one end, far away from the base unit, of the second connecting piece; the two ends of the fifth connecting piece are hinged to the third connecting piece and the fourth connecting piece respectively; and the like. In the using process, when a user changes from a sitting posture to a lying posture and the reverse back anti-forward-sliding frame rotates from a folded state to an unfolded state, at the moment, the front end, close to the driving push rod, of the fifth connecting piece tilts upwards relative to the rear end, the body of the user is prevented from sliding forwards, and the experience comfort degree of the user is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the frame technical field for sofa, concretely relates to a back -to -back prevent front slide frame and sofa. BACKGROUND

[0002] Lying sofa is widely welcomed because of its comfort, which includes household sofa, vehicle-mounted sofa and the like. However, the existing lying sofa generally has a technical problem that the angle of the seat relative to the ground basically remains unchanged when performing the back -to -back action. This design causes the seat position to easily slide forward during the lying process, which affects the user's comfort experience.

[0003] Specifically, when the user changes from a sitting position to a lying position, the center of gravity of the human body changes due to the unchanged angle of the seat, causing the body to slide forward. This sliding not only requires the user to constantly adjust the posture to maintain stability, but also may cause additional pressure on the structure of the sofa. SUMMARY

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a back -to -back prevent front slide frame to solve the problems mentioned in the background technical part.

[0005] The utility model realizes the following technical scheme:

[0006] A back -to -back prevent front slide frame, comprising a base unit, a plurality of spaced apart extension units, and a pushing unit for pushing the extension units,

[0007] The extension unit comprises:

[0008] A first connecting piece and a second connecting piece are hinged to the base unit, and the first connecting piece and the second connecting piece are hingedly connected in a scissors shape,

[0009] One end of the first connecting piece away from the base unit is hingedly connected with a third connecting piece;

[0010] One end of the second connecting piece away from the base unit is hingedly connected with a fourth connecting piece;

[0011] Further comprising a fifth connecting piece hingedly connected with the third connecting piece and the fourth connecting piece at both ends, and the fifth connecting piece is fixedly connected with a seat unit;

[0012] Further comprising a sixth connecting piece hingedly connected with the fourth connecting piece, and a seventh connecting piece hingedly connected with the fifth connecting piece, and the sixth connecting piece and the seventh connecting piece are hingedly connected in a scissors shape;

[0013] Further comprising an eighth connecting piece hingedly connected with the sixth connecting piece, and a ninth connecting piece hingedly connected with the seventh connecting piece, and the eighth connecting piece and the ninth connecting piece are hingedly connected in a scissors shape;

[0014] The pushing unit comprises:

[0015] A driving push rod is hingedly connected to the base unit at one end, and hingedly connected to a first driven member at the other end, the side end of the first driven member is hingedly connected to a second driven member, the second driven member is fixedly connected to the seventh connecting member, the lower end of the first driven member is hingedly connected to a third driven member, and the other end of the third driven member is hingedly connected to the base unit.

[0016] Further, the stretching unit further comprises:

[0017] Further comprising an eighth connecting member hingedly connected to the sixth connecting member, and a ninth connecting member hingedly connected to the seventh connecting member, the eighth connecting member and the ninth connecting member are hingedly connected in a scissor shape;

[0018] Further comprising a tenth connecting member hingedly connected to the ninth connecting member, an eleventh connecting member hingedly connected to the tenth connecting member, and a twelfth connecting member hingedly connected to the eleventh connecting member, the other end of the twelfth connecting member is hingedly connected to the eighth connecting member;

[0019] A thirteenth connecting member is hingedly connected to the tenth connecting member and the twelfth connecting member at both ends respectively;

[0020] The twelfth connecting member is fixedly provided with a foot support unit.

[0021] Further, the stretching unit further comprises:

[0022] A fourteenth connecting member is hingedly connected to the base unit, and a fifteenth connecting member is hingedly connected to the fourteenth connecting member and the fifth connecting member;

[0023] The fifteenth connecting member is fixedly provided with a backrest unit.

[0024] Further, the fifth connecting member is provided with a fifth limiting column, and the third connecting member is provided with a third limiting surface abutting against the fifth limiting column.

[0025] Further, the first connecting member is provided with a first limiting column embedded in the base unit, and the base unit is provided with a first guide long slot for embedding the first limiting column.

[0026] Further, the second connecting member is provided with a second connecting column, and the base unit is provided with a base limiting surface abutting against the second connecting column.

[0027] Further, the eleventh connecting member is provided with an eleventh limiting column, and the twelfth connecting member is provided with a twelfth limiting surface abutting against the eleventh limiting column.

[0028] Further, the fifteenth connecting piece is provided with a fifteenth limiting column, and the fourteenth connecting piece is provided with a fourteenth limiting surface abutting against the fifteenth limiting column.

[0029] Further, the fifteenth connecting piece is provided with a fifteenth limiting column, and the fourteenth connecting piece is provided with a fourteenth limiting surface abutting against the fifteenth limiting column.

[0030] In another aspect, the utility model provides a sofa, including any one of the above-mentioned backrest frame.

[0031] The utility model discloses a backrest frame prevents the front slide, including base unit, a plurality of interval arrangement's stretch unit and be used for pushing the push unit of stretch unit, stretch unit includes: the first connecting piece and second connecting piece of hinging in base unit, first connecting piece and second connecting piece are hinged in the shape of scissors, the first connecting piece is hinged with third connecting piece to the one end away from base unit, the second connecting piece is hinged with fourth connecting piece to the one end away from base unit, still including fifth connecting piece with both ends hinged third connecting piece and fourth connecting piece, fifth connecting piece is fixedly connected with seat unit, still including sixth connecting piece with fourth connecting piece hinged and seventh connecting piece with fifth connecting piece hinged, sixth connecting piece and seventh connecting piece are hinged in the shape of scissors, still including eighth connecting piece with sixth connecting piece hinged and ninth connecting piece with seventh connecting piece hinged, eighth connecting piece and ninth connecting piece are hinged in the shape of scissors, push unit includes: drive push rod, drive push rod one end is hinged with base unit, the other end of drive push rod is hinged with first driven piece, the side end of first driven piece is hinged with second driven piece, second driven piece is fixedly connected with seventh connecting piece, the lower end of first driven piece is hinged with third driven piece, and the other end of third driven piece is hinged with base unit. When the backrest frame prevents the front slide from folding state to the unfolding state when rotating, fifth connecting piece is close to the front end of drive push rod relative to rear end and will be upturned at this moment, prevents the body of user from sliding forward, improves the experience comfort degree of user. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is the perspective drawing for sofa in unfolding state.

[0033] Figure 2 It is the perspective drawing for backrest frame preventing the front slide.

[0034] Figure 3 It is the perspective drawing for stretch unit and push unit in unfolding state.

[0035] Figure 4 It is the perspective drawing for stretch unit in folding state.

[0036] Figure 5 Another perspective view of the stretching unit and the pushing unit in the unfolded state.

[0037] Figure 6 Another perspective view of the stretching unit in the folded state.

[0038] Figure 7 Side view of the reverse back anti-slip frame switching between the folded state and the unfolded state.

[0039] Among them, the above-mentioned drawings include the following reference signs:

[0040] 1, base unit; 11, mounting; 111, first guide long groove; 112, base limiting surface; 2, stretching unit; 201, first connecting piece; 2011, first limiting column; 202, second connecting piece; 203, third connecting piece; 2031, third limiting surface; 204, fourth connecting piece; 205, fifth connecting piece; 2051, fifth limiting column; 2052, fifth limiting surface; 206, sixth connecting piece; 207, seventh connecting piece; 208, eighth connecting piece; 209, ninth connecting piece; 210, tenth connecting piece; 211, eleventh connecting piece; 2111, eleventh limiting column; 212, twelfth connecting piece; 2121, twelfth limiting surface; 213, thirteenth connecting piece; 214, fourteenth connecting piece; 2141, fourteenth limiting surface; 215, fifteenth connecting piece; 2151, fifteenth limiting column; 2152, sixteenth limiting column; 2153, extension; 3, pushing unit; 301, driving push rod; 302, first driven part; 303, second driven part; 304, third driven part; 4, seat unit; 5, foot prop unit; 6, backrest unit. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. It should be noted that the description of the embodiments is used to help understand the present application, but does not constitute limitation to the present application. In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as there is no conflict.

[0042] Reference Figures 1 to 7As shown, a back-to-front anti-sliding frame comprises a base unit 1, a plurality of spaced-apart extension units 2, and a pushing unit 3 for pushing the extension units 2. The back-to-front anti-sliding frame is supported on the ground by the base unit 1, wherein the base unit 1 is provided with two spaced-apart mounting members 11, each of which is fixed with an extension unit 2, and the pushing unit 3 is connected with the two extension units 2. The pushing unit 3 is used to switch the position of the back-to-front anti-sliding frame between a folded state and an unfolded state. In the folded state, the user is in a sitting position; in the unfolded state, the user is in a lying position.

[0043] Specifically, a back-to-front anti-sliding frame comprises a base unit 1, a plurality of spaced-apart extension units 2, and a pushing unit 3 for pushing the extension units 2,

[0044] The extension unit 2 comprises:

[0045] A first connecting member 201 and a second connecting member 202 are hingedly connected to the base unit 1, and the first connecting member 201 and the second connecting member 202 are hingedly connected in a scissors shape,

[0046] An end of the first connecting member 201 away from the base unit 1 is hingedly connected with a third connecting member 203;

[0047] An end of the second connecting member 202 away from the base unit 1 is hingedly connected with a fourth connecting member 204;

[0048] Further comprising a fifth connecting member 205 hingedly connected with the third connecting member 203 and the fourth connecting member 204 at two ends, and the fifth connecting member 205 is fixedly connected with a seat unit 4;

[0049] Further comprising a sixth connecting member 206 hingedly connected with the fourth connecting member 204, and a seventh connecting member 207 hingedly connected with the fifth connecting member 205, and the sixth connecting member 206 and the seventh connecting member 207 are hingedly connected in a scissors shape;

[0050] Further comprising an eighth connecting member 208 hingedly connected with the sixth connecting member 206, and a ninth connecting member 209 hingedly connected with the seventh connecting member 207, and the eighth connecting member 208 and the ninth connecting member 209 are hingedly connected in a scissors shape;

[0051] The pushing unit 3 comprises:

[0052] A driving push rod 301 is hinged at one end to the base unit 1, and a first follower 302 is hinged at the other end of the driving push rod 301, a second follower 303 is hinged at the side end of the first follower 302, the second follower 303 is fixedly connected with the seventh connecting piece 207, a third follower 304 is hinged at the lower end of the first follower 302, and the other end of the third follower 304 is hinged to the base unit 1.

[0053] The driving push rod 301 is a gas cylinder or a telescopic motor, etc., and the angle of the back-tilting anti-forward-sliding frame is kept unchanged by the driving push rod 301.

[0054] The fifth connecting piece 205 is fixedly connected with a seat unit 4, and the seat unit 4 is a sofa cushion including an armrest. In the unfolded state, the driving push rod 301 pushes the first follower 302 and the third follower 304 to be in an open state, and then the first follower 302 drives the seventh connecting piece 207 through the second follower 303, so that the front end of the fifth connecting piece 205 is lifted by the seventh connecting piece 207. Thus, when the user changes from a sitting position to a lying position, the front end of the fifth connecting piece 205 will be lifted upward relative to the rear end, preventing the user's body from sliding forward and improving the user's experience comfort.

[0055] Referring to Figure 6 and Figure 7 The fourth connecting piece 204 includes two straight plate portions arranged in an L shape, and the included angle between the two straight plate portions is 106±5°, so that in the folded state, the height of the front end of the seat unit 4 is reduced, and the use habit is more in line with the use habit.

[0056] Further, the stretching unit 2 further comprises:

[0057] The stretching unit 2 further comprises:

[0058] Further comprising an eighth connecting piece 208 hinged to the sixth connecting piece 206, and a ninth connecting piece 209 hinged to the seventh connecting piece 207, the eighth connecting piece 208 and the ninth connecting piece 209 are hingedly connected in a scissors shape;

[0059] Further comprising a tenth connecting piece 210 hinged to the ninth connecting piece 209, an eleventh connecting piece 211 hinged to the tenth connecting piece 210, and a twelfth connecting piece 212 hinged to the eleventh connecting piece 211, and the other end of the twelfth connecting piece 212 is hinged to the eighth connecting piece 208;

[0060] A thirteenth connecting piece 213 is hinged at both ends to the tenth connecting piece 210 and the twelfth connecting piece 212;

[0061] The twelfth connecting piece 212 is fixedly provided with a foot support unit 5. In the unfolded state, the twelfth connecting piece 212 is in a nearly parallel state with the fifth connecting piece 205, and in the folded state, the fifth connecting piece 205 is in a nearly vertical state, thereby facilitating the user to use in a sitting position or a lying position, the user's legs or feet are placed on the foot support unit 5, and the user's use comfort is improved.

[0062] Further, the stretching unit 2 further comprises:

[0063] The fourteenth connecting piece 214 is hinged to the base unit 1, and the fifteenth connecting piece 215 is hinged to the fourteenth connecting piece 214 and the fifth connecting piece 205.

[0064] The fifteenth connecting piece 215 is fixedly provided with a backrest unit 6. Specifically, the fifteenth connecting piece 215 is provided with an extension 2153 for connecting the backrest unit 6. Through the above connection relationship, in the unfolded state, the angle between the fifteenth connecting piece 215 and the fifth connecting piece 205 is increased through the fourteenth connecting piece 214 compared with the folded state, so that it is more in line with the human sitting or lying posture, the contact area with the human body is increased, and the ergonomics is more adapted, thereby improving the user's use comfort.

[0065] Referring to Figure 6 and Figure 7 , the fifth connecting piece 205 comprises two straight plate portions arranged in an L shape, and the included angle between the two straight plate portions is 98±5°, so that in the folded state, one of the straight plate portions of the fifth connecting piece 205 is nearly parallel to the backrest unit 6, facilitating the user to lean against, and improving the user's use comfort. In the unfolded state, the included angle between the straight plate portion of the fifth connecting piece 205 and the extension 2153 of the fifteenth connecting piece 215 is greater than 180°, and the connection portion is in an upward convex shape, facilitating the support of the user's back and waist, and improving the user's use comfort.

[0066] Referring to Figure 3 , the fifth connecting piece 205 is provided with a fifth limiting column 2051, and the third connecting piece 203 is provided with a third limiting surface 2031 abutting against the fifth limiting column 2051. When the third limiting surface 2031 abuts against the fifth limiting column 2051, the back-tilting and front-sliding prevention frame is in the unfolded state. Through the cooperation of the two, the force can be dispersed, the load of the driving push rod 301 is reduced, and the overall stability of the back-tilting and front-sliding prevention frame is improved.

[0067] Referring to Figure 3 and Figure 4 , the first connecting piece 201 is provided with a first limiting column 2011 embedded in the base unit 1, and the base unit 1 is provided with a first guide long groove 111 for embedding the first limiting column 2011. Referring to Figure 3As shown, when the first limiting column 2011 abuts against the upper arc surface of the first guide long groove 111, the back-to-front sliding prevention frame is in the unfolded state, and the back-to-front sliding prevention frame is in the folded state when the first limiting column 2011 abuts against the lower arc surface of the first guide long groove 111. Figure 4 As shown, when the first limiting column 2011 abuts against the upper arc surface of the first guide long groove 111, the back-to-front sliding prevention frame is in the unfolded state, and the back-to-front sliding prevention frame is in the folded state when the first limiting column 2011 abuts against the lower arc surface of the first guide long groove 111.

[0068] As shown, the eleventh connecting piece 211 is provided with an eleventh limiting column 2111, and the twelfth connecting piece 212 is provided with a twelfth limiting surface 2121 abutting against the eleventh limiting column 2111. Figure 6 As shown, the eleventh connecting piece 211 is provided with an eleventh limiting column 2111, and the twelfth connecting piece 212 is provided with a twelfth limiting surface 2121 abutting against the eleventh limiting column 2111.

[0069] As shown, the fifteenth connecting piece 215 is provided with a fifteenth limiting column 2151, and the fourteenth connecting piece 214 is provided with a fourteenth limiting surface 2141 abutting against the fifteenth limiting column 2151. Figure 4 As shown, the fifteenth connecting piece 215 is provided with a fifteenth limiting column 2151, and the fourteenth connecting piece 214 is provided with a fourteenth limiting surface 2141 abutting against the fifteenth limiting column 2151.

[0070] As shown, the second connecting piece 202 is provided with a second connecting column, and the base unit 1 is provided with a base limiting surface 112 abutting against the second connecting column. Figure 4 As shown, the second connecting piece 202 is provided with a second connecting column, and the base unit 1 is provided with a base limiting surface 112 abutting against the second connecting column.

[0071] On the other hand, the utility model provides a sofa, including one back-to-front sliding prevention frame of the utility model as any above.

[0072] In the description of the utility model, need understanding is, the term "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" "internal", "external", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and so on indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawing, just for the convenience of describing the utility model and simplifying the description, and not indicate or imply the device or element indicated must have a particular orientation, construct and operate in a particular orientation, therefore can not be understood as the limitation of the utility model.

[0073] In the description of the utility model, the terms "first", "second" are only for the purpose of description, and can not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features.

[0074] The above only is the preferred implementation of the utility model and does not limit the utility model, and the utility model can have various changes and changes for the person skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A reverse back anti-forward slide frame, characterized by: The frame comprises a base unit (1), a plurality of spaced-apart extension units (2), and a pushing unit (3) for pushing the extension units (2), The extension unit (2) comprises: a first connecting piece (201) and a second connecting piece (202) hinged to the base unit (1), the first connecting piece (201) and the second connecting piece (202) are hinged in a scissor shape, One end of the first connecting piece (201) away from the base unit (1) is hinged with a third connecting piece (203); One end of the second connecting piece (202) away from the base unit (1) is hinged with a fourth connecting piece (204); Further comprising a fifth connecting piece (205) hinged with the third connecting piece (203) and the fourth connecting piece (204) at both ends, respectively, and a seat unit (4) fixedly connected with the fifth connecting piece (205); Further comprising a sixth connecting piece (206) hinged with the fourth connecting piece (204), and a seventh connecting piece (207) hinged with the fifth connecting piece (205), the sixth connecting piece (206) and the seventh connecting piece (207) are hinged in a scissor shape; Further comprising an eighth connecting piece (208) hinged with the sixth connecting piece (206), and a ninth connecting piece (209) hinged with the seventh connecting piece (207), the eighth connecting piece (208) and the ninth connecting piece (209) are hinged in a scissor shape; The pushing unit (3) comprises: a driving push rod (301) hinged with the base unit (1) at one end, the other end of the driving push rod (301) is hinged with a first driven piece (302), the side end of the first driven piece (302) is hinged with a second driven piece (303), the second driven piece (303) is fixedly connected with the seventh connecting piece (207), the lower end of the first driven piece (302) is hinged with a third driven piece (304), the other end of the third driven piece (304) is hinged with the base unit (1).

2. The frame according to claim 1, wherein: The extension unit (2) further comprises: Further comprising an eighth connecting piece (208) hinged with the sixth connecting piece (206), and a ninth connecting piece (209) hinged with the seventh connecting piece (207), the eighth connecting piece (208) and the ninth connecting piece (209) are hinged in a scissor shape; Further comprising a tenth connecting piece (210) hinged with the ninth connecting piece (209), an eleventh connecting piece (211) hinged with the tenth connecting piece (210), a twelfth connecting piece (212) hinged with the eleventh connecting piece (211), the other end of the twelfth connecting piece (212) is hinged with the eighth connecting piece (208); A thirteenth connecting piece (213) hinged with the tenth connecting piece (210) and the twelfth connecting piece (212) at both ends, respectively; The twelfth connecting piece (212) is fixedly provided with a foot support unit (5).

3. The frame according to claim 1, wherein: The extension unit (2) further comprises: A fourteenth connecting piece (214) hinged with the base unit (1), and a fifteenth connecting piece (215) hinged with the fourteenth connecting piece (214) and the fifth connecting piece (205); The fifteenth connecting piece (215) is fixed with a backrest unit (6).

4. A reverse tilt anti-forward slide frame according to claim 1, wherein: The fifth connecting piece (205) is provided with a fifth limiting column (2051), and the third connecting piece (203) is provided with a third limiting surface (2031) abutting against the fifth limiting column (2051).

5. A reverse tilt anti-forward slide frame according to claim 1, wherein: The first connecting piece (201) is provided with a first limiting column (2011) embedded in the base unit (1), and the base unit (1) is provided with a first guide long slot (111) for embedding the first limiting column (2011).

6. A reverse tilt anti-forward slide frame according to claim 1, wherein: The second connecting piece (202) is provided with a second connecting column, and the base unit (1) is provided with a base limiting surface (112) abutting against the second connecting column.

7. A reverse tilt anti-forward slide frame according to claim 2, wherein: The eleventh connecting piece (211) is provided with an eleventh limiting column (2111), and the twelfth connecting piece (212) is provided with a twelfth limiting surface (2121) abutting against the eleventh limiting column (2111).

8. A reverse tilt anti-forward slide frame according to claim 3, wherein: The fifteenth connecting piece (215) is provided with a fifteenth limiting column (2151), and the fourteenth connecting piece (214) is provided with a fourteenth limiting surface (2141) abutting against the fifteenth limiting column (2151).

9. A reverse tilt anti-forward slide frame according to claim 3, wherein: The fifteenth connecting piece (215) is provided with a sixteenth limiting column (2152), and the fifth connecting piece (205) is provided with a fifth limiting surface (2052) abutting against the sixteenth limiting column (2152).

10. A sofa characterized in that: A frame is provided, which comprises a frame as claimed in any one of claims 1 to 9.

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