Torsion joint of lamp holder

Abstract

The utility model relates to a torsion joint of a lamp holder, a first pivot joint seat is provided with a first containing cavity which is through left and right, and a first ball body is arranged in the first containing cavity; the second pivot joint seat is provided with a second containing cavity penetrating front and back, and a second ball is arranged in the second containing cavity. An upper rotating lug is arranged at the upper end of the connecting piece, a lower rotating lug is arranged at the lower end of the connecting piece, a clamping ring is arranged at the top end of the upper rotating lug and buckled on the first ball body, and the inner wall of the clamping ring is in movable contact with the first ball body with frictional resistance; a through hole is formed in the middle of the lower rotating lug and sleeves the second ball body, and the inner wall of the through hole is in movable contact with the second ball body with frictional resistance; the first ball body and the second ball body are elastic rubber bodies, and friction resistance between the first ball body and the second ball body and the connecting piece is adjusted through expansion of rubber. Resistance limiting of the joint is achieved through the rubber ball, abrasion of rubber to the connecting base and the connecting piece is small, the friction resistance can be controlled through expansion, and the damping adjusting effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bionic movable joints, specifically relates to a torsion joint of a lamp holder. Background Art

[0002] Desk lamps are a common lighting tool, and foldable lamps are particularly common. Conventional desk lamps typically use bolts as both the connecting and rotating shafts, with the lamp holder's angle being maintained by friction between the lamp's shaft end and the lampholder's shaft. These lamp frames are often made of PVC, and the bolts are often metal. Over time, the frame wears, reducing friction on the shaft and causing the lamp holder's angle to become unstable. Accumulated wear can lead to frame breakage, shortening the lamp's lifespan. Utility Model Content

[0003] The technical problem to be solved by the utility model is that the rotation damping of the existing table lamp rotation joint is consumed and the expected angle of the lamp head cannot be stably fixed.

[0004] The utility model solves the above problems by adopting the following technical solutions:

[0005] A torsional joint of a lamp holder comprises a first joint for connecting a lamp base, a second joint for connecting the lamp holder and a connecting piece, the first joint comprising a lamp holder mounting seat, a first pivot seat being fixedly connected to the lower side of the lamp holder mounting seat, the first pivot seat being provided with a first accommodating cavity which passes through left and right, and a first sphere being provided in the first accommodating cavity; the second joint comprises a lamp holder mounting seat, a second pivot seat being fixedly connected to the upper side of the lamp holder mounting seat, the second pivot seat being provided with a second accommodating cavity which passes through front and back, and a second sphere being provided in the second accommodating cavity; the connecting piece has an upper rotating ear at the upper end and a lower rotating ear at the lower end, a snap ring being provided at the top of the upper rotating ear, the snap ring being buckled on the first sphere and its inner wall being in movable contact with the first sphere with friction resistance; a through hole being provided in the middle of the lower rotating ear, the through hole being sleeved on the second sphere and its inner wall being in movable contact with the second sphere with friction resistance; the first sphere and the second sphere are elastic rubber bodies, and the friction resistance between the first sphere and the connecting piece is adjusted by the expansion of the rubber.

[0006] Compared with the prior art, the present invention adopting the above structure has the following beneficial effects:

[0007] The utility model utilizes the rubber ball to realize the resistance limitation of the joint, the rubber causes little wear to the connecting seat and the connecting piece, and can control the size of the friction resistance through expansion, thereby playing the role of adjusting the damping.

[0008] Optionally, the first pivot seat is composed of a fixed seat and a movable seat, and the inner walls of the fixed seat and the movable seat are provided with grooves; the fixed seat is fixed to the front side of the lamp holder mounting seat, and the rear side of the lamp holder mounting seat is provided with an engaging groove adapted to the movable seat, the fixed seat and the movable seat are fixed by snap-fitting the mating surfaces, and the top of the movable seat is inserted into the engaging groove and bonded to the engaging groove.

[0009] Furthermore, a through screw hole is provided on the rear side of the movable seat, a top screw is installed in the screw hole, and the inner end of the top screw is in contact with the first sphere.

[0010] Optionally, the second pivot seat is composed of a left support seat and a right support seat, the inner walls of the left support seat and the right support seat are provided with spherical grooves, and the rear side of the spherical groove is provided with a mounting hole; the second sphere is composed of a left hemisphere and a right hemisphere, a sleeve shaft is installed on the left hemisphere, the front end of the sleeve shaft is provided with a threaded hole and the end is installed in the left hemisphere, and the rear end of the sleeve shaft is installed in the mounting hole of the left support seat; the right hemisphere is installed with a screw shaft, the front end of the screw shaft is threaded in the threaded hole, and the rear end is installed in the mounting hole of the right support seat; a baffle is also provided on the rear side of the left hemisphere and the right hemisphere, and the baffle is fixed to the sleeve shaft or the screw shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is the overall structural diagram of the utility model;

[0012] Figure 2 This is a side structural diagram of the first joint of the utility model;

[0013] Figure 3 This is a side structural sectional view of the first joint of the utility model;

[0014] Figure 4 This is a front structural diagram of the first joint of the utility model;

[0015] Figure 5 This is a front structural sectional view of the first joint of the utility model;

[0016] Figure 6 This is a sectional view of the utility model along line AA;

[0017] Figure 7 This is a schematic diagram of the AA line structure decomposition of the utility model;

[0018] Figure 8 This is a side structural diagram of an example of a connector of the present utility model;

[0019] Figure 9 This is a side structural diagram of Example 2 of the connector of the utility model;

[0020] Figure 10 This is a schematic diagram of the front structure of the second joint of the utility model;

[0021] Figure 11This is a cross-sectional view of the second joint of the utility model;

[0022] Figure 12 This is a schematic diagram of the side structure of the second joint of the utility model;

[0023] Figure 13 This is a diagram of the assembly structure of the left hemisphere and the right hemisphere of the utility model;

[0024] Figure 14 This is an exploded view of the assembly structure of the left hemisphere and the right hemisphere of the utility model.

[0025] In the figure: 1, first joint; 101, lamp holder mounting seat; 102, fixed seat; 103, movable seat; 104, first accommodating cavity; 105, limit plate; 106, screw hole;

[0026] 2. Connector; 201. Upper rotating ear; 202. Snap ring; 203. Lower rotating ear; 204. Through hole;

[0027] 3. Second joint; 301. Lamp holder mounting base; 302. Left support base; 303. Right support base; 304. Second accommodating cavity; 305. Mounting hole;

[0028] 4. First sphere; 5. Dovetail groove; 6. Dovetail block; 7. Top screw; 8. Press block; 9. Second sphere; 901. Left hemisphere; 902. Right hemisphere; 903. Sleeve shaft; 904. Screw shaft; 905. Baffle. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0030] See also Figure 1 The utility model provides a torsion joint of a lamp holder, comprising a first joint 1 for connecting to a lamp base, a second joint 3 for connecting to the lamp holder, and a connecting piece 2.

[0031] See also Figures 2 to 7 The first joint 1 includes a lamp holder mounting seat 101, and the lower side of the lamp holder mounting seat 101 is fixedly connected to a first pivot seat, and the first pivot seat is provided with a first accommodating cavity 104 that passes through the left and right sides, and a first sphere 4 is provided in the first accommodating cavity 104.

[0032] See also Figures 10 to 14 The second joint 3 includes a lamp holder mounting seat 301, and a second pivot seat is fixedly connected to the upper side of the lamp holder mounting seat 301. The second pivot seat is provided with a second accommodating cavity 304 that passes through the front and back, and a second sphere 9 is provided in the second accommodating cavity 304.

[0033] See also Figure 8 、 Figure 9 The connector 2 has an upper rotating ear 201 at its upper end and a lower rotating ear 203 at its lower end. The top of the upper rotating ear 201 is provided with a snap ring 202, which is buckled on the first sphere 4 and its inner wall is in active contact with the first sphere 4 with friction resistance; the middle of the lower rotating ear 203 is provided with a through hole 204, which is sleeved on the second sphere 9 and its inner wall is in active contact with the second sphere 9 with friction resistance. The snap ring 202 can be as follows Figure 8 The C-ring shown can also be Figure 9 Closed ring shown.

[0034] The first sphere 4 and the second sphere 9 of the present invention are elastic rubber bodies, and the friction resistance between the first sphere 4 and the second sphere 9 and the connector 2 is adjusted by the expansion of the rubber.

[0035] The rotation of the connecting member 2 and the first joint 1 of the utility model is used to control the left and right rotation angle of the lamp head, and the rotation of the connecting member 2 and the second joint 3 is used to control the expansion and contraction of the console lamp.

[0036] Optionally, the first pivot seat is composed of a fixed seat 102 and a movable seat 103, and the inner walls of the fixed seat 102 and the movable seat 103 are provided with spherical grooves; the fixed seat 102 is fixed to the front side of the lamp holder mounting seat 101, and the rear side of the lamp holder mounting seat 101 is provided with an engaging groove adapted to the movable seat 103, the fixed seat 102 and the movable seat 103 are fixed by snap-fitting the mating surfaces, and the top of the movable seat 103 is inserted into the engaging groove and bonded and fixed to the engaging groove.

[0037] The spherical groove is used to stabilize the first sphere 4. The spherical groove can abut against the first sphere 4 to limit its rotation or displacement. Furthermore, a through screw hole 106 is provided on the rear side of the movable seat 103. A top screw 7 is installed in the screw hole 106. The inner end of the top screw 7 abuts against the first sphere 4. The top screw 7 is used to adjust the extrusion strength of the first sphere 4, thereby adjusting the diameter and circumference of the circle in contact with the snap ring 202. Figure 6 、 Figure 7 As shown, in order to optimize the squeezing effect on the first ball, a pressing block 8 is installed at the end of the top screw 7.

[0038] Furthermore, a through screw hole 106 is provided on the rear side of the movable seat 103 , and a top screw 7 is installed in the screw hole 106 , and the inner end of the top screw 7 is in contact with the first sphere 4 .

[0039] Generally, the appropriate tilt angle is adjusted according to the distance between the lamp and the user. A rotation range of 20 degrees to 30 degrees to the left or right can meet the requirements. In order to reasonably restrict the tilt angle of the lamp head, a limit plate 105 can be set on the side of the first accommodating cavity 104. Figure 5 The height of the lower end of the limiting plate 105 can constrain the rotation angle of the upper rotating ear 201; the limiting plate 105 can be made into one piece with the fixed seat 102 or the movable seat 103.

[0040] The present invention also provides a connection structure between the fixed seat 102 and the movable seat 103. Figure 6 、 Figure 7 The fixed seat 102 is provided with a dovetail groove 5 on the side, and the movable seat 103 is provided with a dovetail block 6 on the side. During installation, the first sphere 4 is first placed in the predetermined position of the fixed seat 102, and then the retaining ring 202 is buckled onto the first sphere. The movable seat 103 is then inserted from the bottom along the dovetail groove 5. After the top end is pushed into the fitting groove, it is installed in place. The top screw 7 is rotated to make the pressure block 8 pressurize the first sphere 4, causing the first sphere 4 to expand and deform, thereby increasing the friction resistance of the contact surface between the first sphere 4 and the retaining ring 202. The dovetail block 6 structure ensures the stability of the first joint 1, prevents the movable seat 103 from separating from the fixed seat 102, and prevents the movable seat 103 from tilting when the top screw 7 is pressurized.

[0041] Optionally, the second pivot seat is composed of a left support seat 302 and a right support seat 303, and the inner walls of the left support seat 302 and the right support seat 303 are provided with spherical grooves, and the rear side of the spherical groove is provided with a mounting hole 305; the second sphere 9 is composed of a left hemisphere 901 and a right hemisphere 902, and a sleeve shaft 903 is installed on the left hemisphere 901, and the front end of the sleeve shaft 903 is provided with a threaded hole and the end is installed in the left hemisphere 901, and the rear end of the sleeve shaft 903 is installed in the mounting hole 305 of the left support seat 302; the right hemisphere 902 is installed with a screw shaft 904, and the front end of the screw shaft 904 is threadedly sleeved in the threaded hole, and the rear end is installed in the mounting hole 305 of the right support seat 303; a baffle 905 is also provided on the rear side of the left hemisphere 901 and the right hemisphere 902, and the baffle 905 is fixedly connected to the sleeve shaft 903 or the screw shaft 904.

[0042] The beneficial effects of the utility model are as follows: the utility model uses the rubber ball to realize the resistance limit of the joint, the rubber causes little wear to the connecting seat and the connecting piece, and can control the size of the friction resistance by expansion, thereby playing the role of adjusting the damping.

[0043] The above description is only a preferred embodiment of the present invention and does not limit the scope of the present invention. Any equivalent changes made using the contents of the present invention specification and its drawings are included in the scope of the present invention.

Claims

1. A torsion joint of a lamp holder, comprising a first joint (1) for connecting to a lamp base, a second joint (3) for connecting to the lamp holder, and a connecting member (2), characterized in that: The first joint (1) comprises a lamp holder mounting seat (101), the lower side of the lamp holder mounting seat (101) is fixedly connected to a first pivot seat, the first pivot seat is provided with a first accommodating cavity (104) extending leftward and rightward, and a first sphere (4) is provided in the first accommodating cavity (104); The second joint (3) comprises a lamp holder mounting seat (301), the upper side of the lamp holder mounting seat (301) being fixedly connected to a second pivot seat, the second pivot seat being provided with a second accommodating cavity (304) extending through the front and rear, and a second sphere (9) being provided in the second accommodating cavity (304); A connecting member (2) is provided with an upper rotating ear (201) at the upper end and a lower rotating ear (203) at the lower end; a snap ring (202) is provided at the top end of the upper rotating ear (201); the snap ring (202) is buckled onto the first sphere (4) and its inner wall is in movable contact with the first sphere (4) with friction resistance; a through hole (204) is provided in the middle of the lower rotating ear (203); the through hole (204) is sleeved on the second sphere (9) and its inner wall is in movable contact with the second sphere (9) with friction resistance; The first sphere (4) and the second sphere (9) are elastic rubber bodies, and the friction resistance between them and the connecting member (2) is adjusted by the expansion of the rubber.

2. The torsion joint of a lamp holder according to claim 1, characterized in that: The first pivot seat is composed of a fixed seat (102) and a movable seat (103), and the inner walls of the fixed seat (102) and the movable seat (103) are provided with grooves; the fixed seat (102) is fixed to the front side of the lamp holder mounting seat (101), and the rear side of the lamp holder mounting seat (101) is provided with an engaging groove adapted to the movable seat (103); the fixed seat (102) and the movable seat (103) are fixed by snapping the matching surfaces, and the top end of the movable seat (103) is inserted into the engaging groove and is adhesively fixed to the engaging groove.

3. The torsion joint of a lamp holder according to claim 2, characterized in that: A through screw hole (106) is provided on the rear side of the movable seat (103), a top screw (7) is installed in the screw hole (106), and the inner end of the top screw (7) is in contact with the first sphere (4).

4. The torsion joint of a lamp holder according to claim 1, characterized in that: The second pivot seat is composed of a left support seat (302) and a right support seat (303), the inner walls of the left support seat (302) and the right support seat (303) are provided with a spherical groove, and the rear side of the spherical groove is provided with a mounting hole (305); the second sphere (9) is composed of a left hemisphere (901) and a right hemisphere (902), a sleeve shaft (903) is installed on the left hemisphere (901), and the front end of the sleeve shaft (903) is provided with a threaded hole and the end is installed in the left hemisphere (901), and the sleeve shaft (903) is provided with a threaded hole. The rear end of the tube shaft (903) is installed in the mounting hole (305) of the left support seat (302); a screw shaft (904) is installed on the right hemisphere (902), the front end of the screw shaft (904) is threadedly sleeved in the threaded hole, and the rear end is installed in the mounting hole (305) of the right support seat (303); a baffle (905) is further provided on the rear side of the left hemisphere (901) and the right hemisphere (902), and the baffle (905) is fixedly connected to the tube shaft (903) or the screw shaft (904).

5. The torsion joint of a lamp holder according to claim 1, characterized in that: The snap ring (202) is a C-shaped ring.

6. The torsion joint of a lamp holder according to claim 1, characterized in that: The snap ring (202) is a closed ring.

Images