Foldable and liftable table tennis table with four legs provided with lock catch devices

Abstract

In order to enable adults and children to play table tennis at home, the utility model provides the table tennis table which can be folded, lifted and locked and is easy to move. As shown in Figure 4, the table tennis table comprises table tennis table tops (1 and 1 '), table legs (3 and 3'), table top lifting rails (4 and 4 ') welded to the table legs and table top lifting control rods (14 and 14'), after the table tops are unfolded and locked, the rods (1 and 1 '), the rods (3 and 3') and the rods (14 and 14 ') form a triangle, and when the table tops are folded, the rods (1 and 1'), the rods (3 and 3 '), the rods (14 and 14') and the rods form a deformable triangle. Besides the rod pieces, the table tennis table further comprises a locking device after the table top is unfolded, a damping device for preventing inertia collision when the table top is unfolded and folded, a lifting device suitable for children to play table tennis and the like, and compared with a similar patent with the patent number of 201320135714.4, all the devices are simplified, so that the table tennis table is easy to manufacture and convenient to operate.

Description

Technical Field

[0001] The present invention relates to a foldable table tennis table. In particular, the present invention relates to a foldable table tennis table. When unfolding, two table tops are placed horizontally (in use state). When folding, the two table tops are brought together vertically (folded state). ... Background Art

[0002] Table tennis is a sport enjoyed by people of all ages and enjoys a broad mass following in my country. While playing in a ping-pong hall or outdoor table tennis table is acceptable in spring and summer, it becomes inconvenient in winter and during bad weather. Having a foldable, liftable table tennis table at home, suitable for both adults and children, and taking up minimal floor space when folded, is a good option. To this end, in 2013, I invented a "foldable and liftable table tennis table with a locking and lifting mechanism, patent number: 201320135714.4." However, the table tennis table has a double row of supporting rods, numerous rods, a complex locking mechanism, and damping rods and springs on the upper parts of the four legs. This creates a large gap between the two tabletops when folded, resulting in high manufacturing costs and a potential market challenge.

[0003] The present invention is proposed in view of the existing situation in the above paragraph. After the improvement, the supporting rod is single. On the original basis, the supporting rods are reduced, the locking device is realized by a rotating rod locking handle and a rotating locking handle hinge, the damping rod and the damping spring on the upper part of the four legs are cancelled, and are replaced by a table top connecting damping hinge. On the basis of ensuring the original functions, various settings are simplified. After folding, the distance between the two table tops is smaller, which further improves the folding rate and can be placed in the corner of the home. Due to the reduction of supporting rods, the simplification of the damping rod, the damping spring and the locking device, the manufacturing cost is reduced. Summary of the Invention

[0004] In order to achieve the above objectives, the following problems need to be solved:

[0005] 1. After the support rods are reduced, the table legs must still be stable. The table top can be unfolded to support the table top stably, and the table top can be folded to rotate to a vertical position.

[0006] 2. The desktop should be able to be locked when unfolded and should not be deformed by collision during movement.

[0007] 3. When the table top is folded and unfolded, the stability of the table top and legs must be ensured to prevent it from tipping over.

[0008] 4. Since the table top is heavy and the legs are supported in the middle of the table top, when the table top is folded or unfolded, if there is not much resistance, the table top will produce a rotational inertia impact force. For safety reasons, the table top should be folded or unfolded slowly.

[0009] 5. Under the condition that the length of the table legs remains unchanged, the table top can be raised and lowered, and the table top can be stabilized at different heights.

[0010] The solution to the above problem is:

[0011] 1. If Figure 4 As shown, two table legs (3, 3') are installed in the middle of each table top. The legs with ' and without ' are symmetrical. The legs with ' will not be described later. When the table top is unfolded and locked, the table top (1), the legs (3), and the table top lifting control rod (14) form a stable triangle. When the table top is folded, the table top (1), the legs (3), and the table top lifting control rod (14) form a deformable triangle. This triangle will not fall outward under the action of the table leg balance spring (15), thereby realizing that the table top can be unfolded and folded. Figure 1 、 33 , as shown in Figure 34.

[0012] 2. When the table tennis table is unfolded, in order to make it stable, a rotating rod lock handle (17) is added below the table top plate, and a rotating lock hinge (24) is used to connect them. The center of the hinge rotation axis is set on the line connecting the center of the rotation axis of the table top connection damping hinge (2). Since the hinge can only rotate in one direction, the rotating lock hinge (24) rotates to a horizontal position, and its rotation direction is consistent with the table top connection damping hinge (2). The table top can be folded. Figure 3 As shown, when the table is rotated to be vertical to the damping hinge (2) connected to the table, the table is locked, as shown in FIG. Figure 1 shown.

[0013] 3. In order to prevent the table legs (3) from falling outward during the process of folding and unfolding the table top, a table leg balancing spring (15) and a balancing spring hinge seat (23) are added. Under the action of the table leg balancing spring (15), the two table legs always have a torque that is relatively close to each other and will not fall outward. At the same time, in order to prevent the table legs (3) from falling inward, a raised end is provided at the hinged rotation point of the table top moving wheel (16). When the table legs (3) are rotated to be perpendicular to the table top moving wheel (16), the raised end abuts against the moving wheel frame, preventing the table legs from falling inward, thereby making the table legs (3) always perpendicular to the ground. Figure 23 shown.

[0014] 4. In order to prevent the unsafe factors of the inertial impact force of the desktop rotation, the desktop connection hinge uses a desktop connection damping hinge (2). Under the action of the desktop connection damping hinge (2), the table tennis table (1) will be slowly folded or unfolded, such as Figure 1 、 33 shown

[0015] 5. If Figure 4 、 5As shown, in the triangle formed by the table tennis table (1), the table legs (3), and the table top lifting control rod (14), the table legs (3) change from vertically supporting the ground to tilting supporting the ground. In this process, the table top is lowered or raised by moving the table legs (3) up and down at the intersection of the table top lifting control rod (14). When the table top is lowered to the required height, the extended end of the table top lifting control rod (14) is held and pushed horizontally, so that the large diameter shaft of the table top lifting moving shaft (8) enters the hole of the table top lifting track (4) and is stuck. In order to prevent the table top lifting control rod (14) from being lowered by the user without human control, the table top lifting control rod (14) is lifted and lowered. The desktop lifting rail (4) is manually controlled so that the desktop lifting control rod (14) moves to the left or right side. The limiting steel ball (11) is provided with a steel ball telescopic spring (12) and a steel ball limiting snap ring (13). The steel ball limiting snap ring (13) can only move up and down with the control rod and cannot move left and right. Under manual control, no matter whether the desktop lifting control rod (14) moves to the left or right side of the desktop lifting track (4), the limiting steel ball (11) will enter the circular hole of the steel ball limiting snap ring (13) under the action of the steel ball telescopic spring (12), so that the desktop lifting moving shaft (8) cannot be easily displaced, thereby achieving the purpose of stabilizing the desktop at different heights. Figure 12 、 13 , 14, 15, 16, and 19. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a side view of the table tennis table when it is unfolded, at this time the table tennis table is in a fixed state;

[0017] Figure 2 This is a side view of the table tennis table after it is lowered, at this time the table tennis table is in a fixed state;

[0018] Figure 3 This is the state of the table tennis table when it is ready to be folded;

[0019] Figure 4 It is a numbered side view of the table tennis table in its unfolded and fixed state;

[0020] Figure 5 It is a numbered expanded side view of the table tennis table when it is lowered to the lowest position and fixed;

[0021] Figure 6 This is a bottom view of the table tennis table after it is unfolded;

[0022] Figure 7 This is a bottom view of a table tennis table with numbers;

[0023] Figure 8 It is the numbered leg on the left end of the ping-pong table;

[0024] Figure 9 It is the numbered leg on the right end of the ping-pong table;

[0025] Figure 10This is a bottom view of the notch on the left side of the upper connecting rod of the table leg;

[0026] Figure 11 This is a bottom view of the notch on the right side of the upper connecting rod of the table leg;

[0027] Figure 12 This is the front view of the table tennis table lifting track;

[0028] Figure 13 This is a side view of the sectional view of the table tennis table lifting track;

[0029] Figure 14 This is a three-dimensional side view of the table tennis table lifting track;

[0030] Figure 15 This is a cross-sectional view of the intersection of the desktop lift track and the lift control rod;

[0031] Figure 16 This is the side view of the desktop lifting and moving axis;

[0032] Figure 17 This is a side view of the relative positions of the bearing, gasket, screw, and steel ball limit ring;

[0033] Figure 18 This is a side view of the relative positions of the desktop lift track and the desktop lift control lever;

[0034] Figure 19 This is a side view of the cross section where the tabletop lift track intersects the lift control rod;

[0035] Figure 20 This is a side view of the desktop lifting and moving axis;

[0036] Figure 21 This is a side view showing the relative positions of the bearing, gasket, screw, and steel ball limit ring;

[0037] Figure 22 This is a side view showing the relative positions of the table lift track and the table lift control lever;

[0038] Figure 23 This is a side view of the table legs and table top moving wheels being vertically articulated;

[0039] Figure 24 This is a side view of the table legs and table top moving wheels tilted and articulated;

[0040] Figure 25 It is a side view of the Z-shaped steel plates connected to the two sides of the table top;

[0041] Figure 26 It is a bottom view of the locking handle limit fixing seat (18) and the locking handle limit pin (19) when the table is folded;

[0042] Figure 27 It is a bottom view of the locking handle limit fixing seat (18) and the locking handle limit pin (19) when locked on the desktop;

[0043] Figure 28 It is a front view of the locking handle limit fixing seat (18) and the locking handle limit pin (19) when the table top is folded;

[0044] Figure 29 It is a front view of the locking handle limit fixing seat (18) and the locking handle limit pin (19) when locked on the desktop;

[0045] Figure 30 The lock is rotated to put the hinge (24) vertically downward, and the table tennis table is fixed at this time;

[0046] Figure 31 The locking buckle is rotated to put the hinge (24) into a horizontal state, and the table tennis table is folded;

[0047] Figure 32 This is a partial cross-sectional perspective view of the table tennis table when it is folded 45 degrees;

[0048] Figure 33 This is the side view of the table tennis table when it is folded 45 degrees;

[0049] Figure 34 This is a side view of the ping pong table when it is fully folded.

[0050] Number in the figure

[0051] 1; 1'- table tennis table 14; 14'- table lifting control rod

[0052] 2; 2'-Desktop connection damping hinge 15; 15'-Table leg balance spring

[0053] 3; 3'- table legs 16; 16'- table top moving wheels

[0054] 4; 4'-Desktop lifting track 17; 17'-Rotating rod lock handle

[0055] 5; 5'- table leg upper connecting rod 18; 18'- lock handle limit fixing seat

[0056] 6; 6'- table leg lower connecting rod 19; 19'- lock handle limit pin

[0057] 7;7'-track rolling bearing 20;20'-lock handle rotating fixed seat

[0058] 8; 8'-desktop lifting and moving axis 21; 21'-table leg support hinge seat

[0059] 9; 9'- bearing blocking gasket 22; 22'- lifting control rod hinge seat

[0060] 10; 10'- bearing blocking screw 23; 23'- balance spring hinge seat

[0061] 11; 11'-limited steel ball 24-rotating lock handle hinge

[0062] 12; 12'- steel ball telescopic spring 25- lock handle change direction tension spring

[0063] 13; 13'-Steel ball limit snap ring DETAILED DESCRIPTION

[0064] The table tennis table (1) is made according to a net height of 760 mm and can be adjusted between 560 and 760 mm. The table top has a length × width of 2740 × 1525 mm and is made of finished compressed plate material. The table top is 18 mm thick and 30 × 20 × 1 mm square tubes are used as reinforcing ribs around the bottom surface of the table top. The table top is connected to the damping hinge (2) using a 100 × 80 × 2 mm finished damping hinge, and a Z-shaped 100 × (50 + 48 + 40) × 2 mm steel plate is installed on both sides of each hinge. Figure 25 As shown; the table leg (3) is 653mm long and is made of a 40×40×1mm square tube; the center distance between the left and right legs of a single table top is 1000mm;

[0065] The tabletop lifting track (4) is 400mm long and is made of 20×20×1mm square tubes. It is welded to the upper and lower sides of the table leg connecting rods (5, 6). The upper part is padded with four square tube heads. The square tube heads are made of 20×20×1mm square tubes, 40mm long, and horizontally protrude 60mm from the center of the table leg support hinge seat. The side of the tabletop lifting track (4) is drilled with φ14mm holes at 126mm, 144mm, 167mm, 205mm, and 351mm from top to bottom, and a 10mm wide groove is opened. Figure 13 As shown; the upper and lower table leg connecting rods (5, 6) on the sides of the two table legs are 960mm long and made of 30×30×1mm square tubes and welded to the opposite sides of the table legs; the upper side of the table leg upper connecting rod (5) is 65mm away from the center of the table leg support hinge seat (21), and a gap is reserved between 202 and 296mm near the welding table legs, and a 134×40×4mm flat iron is welded on the back of the gap. This gap is a reserved position for the desktop lifting track (4). When the desktop is fully folded, the desktop lifting track (4) can be inserted into the gap, as shown in FIG. Figure 10 、 11 Track rolling bearing (7), outer diameter 17mm, inner diameter 9mm, thickness 5mm, purchase finished product, such as Figure 15 desktop lifting movable shaft (8) is 46mm long, 9mm in small diameter and 14mm in large diameter, and is made of φ16 steel bars, as shown. Figure 16As shown; bearing blocking gasket (9) outer diameter 12mm, inner diameter 5mm, thickness 1mm, purchase finished product, such as Figure 17 As shown; bearing blocking screw (10), with φ5 × 5mm countersunk screw, purchase finished product, such as Figure 17 As shown; limit steel ball (11), use φ8mm steel ball, purchase finished product, such as Figure 15 As shown; steel ball telescopic spring (12), with an outer diameter of φ8mm spring, purchase the finished product, such as Figure 15 As shown; ball limit clasp (13), made of 1mm thick steel plate 31.5 × 21.5 × 30 square ring, drill φ14mm holes at both ends, drill two φ7mm holes on the upper and lower sides, such as Figure 17 As shown; desktop lifting control rod (14) full length 1194mm, with 30 × 20 × 1mm square tube, from the lifting control rod hinge seat (22) center to the other end 464mm on the bend 13.5 degrees, such as Figure 4 Table leg balance spring (15), the telescopic range is between 350 ~ 550mm, with an outer diameter of φ20mm spring, purchase finished products, such as Figure 1 、 34 As shown; the desktop moving wheel (16) is 89mm high with a reserved notch, and a 1-inch universal wheel is used. The outer wheel has a brake and the inner wheel does not have a brake. The universal wheel bracket is made of 40×4mm flat iron. The two wheels under one table leg are 176mm apart. The notch on the wheel frame surface is 35mm high. This notch is a reserved position for the peripheral reinforcement ribs of the desktop. When the desktop is fully folded, the reinforcement ribs can be inserted into the notch. Figure 33 、 34 As shown; the table leg support hinge seat (21) is made of two 2-30×30×3×40mm angle irons. The center of the axis hole is 15mm from the bottom of the table top and 705mm from the center of the table top connection damping hinge (2). Figure 4 As shown; the lifting control rod hinge seat (22) is made of two 2-30×30×3×40mm angle irons. The center of the axis hole is 15mm from the bottom of the desktop and 140mm from the center of the desktop connection damping hinge (2). Figure 4 As shown; the balance spring hinge seat (23) is 50 + 95mm long, the flange portion is 50mm, the raised portion is 95mm, and is made of a 50 × 50 × 1.5mm square tube. The center is 90mm from the center of the two table legs and 390mm from the center of the table leg support hinge seat (21) closer to the center. Figure 7 As shown; the rotating rod lock handle (17) is shaped as Figure 4 、 7As shown, the straight part is 1206mm long, the bend part is 131mm long, the handle part is 114mm long, the center of the straight part is 90mm away from the center of the long direction of the desktop, and it is made of φ18×2mm steel pipe. The bend part of the rotating rod lock handle (17) is welded with the rotating lock hinge (24). This hinge can be purchased as a 100×80×2mm finished product, and then the two pages of this hinge are widened to 60mm. The distance between one side of the hinge at the bend of the hinge and the center of the straight part of the rotating rod lock handle (17) is 50mm. Figure 7 In order to enable the rotating lock hinge (24) to be accurately rotated to a horizontal or vertical position, a 6×16.5mm hole groove is opened at the lower portion of the lock handle limit fixing seat (18), as shown. Figure 26 、 27 As shown, the locking handle limit fixing seat (18) is made of 25×132×1.5mm thick steel plate, and is 1138mm away from the center of the desktop connecting damping hinge (2). Figure 7 As shown; the lock handle limit pin (19) is inserted with a φ6×23mm screw, as shown Figure 28 、 29 The lock is rotated to fix the seat (20) with a 25 × 132 × 1.5mm thick steel plate, the center distance from the desktop connecting damping hinge (2) is 175mm, as shown. Figure 7 As shown; the lock latch hinge (24) is hung on the lock handle changing spring (25) is subjected to a force length of 80mm to 115mm and is telescopic, and a finished tension spring of φ15 is used. Regardless of whether the rotating lock latch handle (17) on the rotating lock latch hinge (24) is turned to a horizontal position or a vertical position, the lock latch handle changing spring (25) can make the rotating lock latch handle (17) play a role in stopping rotation, such as Figure 30 、 31 shown.

Claims

1. A table tennis table with four legs having locking devices capable of being folded and raised and lowered, comprising a table tennis table top (1, 1'), Table legs (3, 3'), table top lifting rails (4, 4'), table top lifting control rods (14, 14'), upper connection of the table legs Connecting rod (5, 5'), lower connecting rod of table leg (6, 6'), table leg support hinge seat (21, 21'), lifting control The rod-making hinge seat (22, 22') is characterized by: When the table top is unfolded and locked, the table top (1, 1'), the table legs (3, 3'), the desktop lifting control rod (14, 14') form a triangular support frame; when the desktop is folded, the desktop (1, 1'), table legs (3, 3'), and table top lifting control rods (14, 14') form a deformable triangle.

2. The table tennis table according to claim 1, wherein: Also includes desktop connection damping hinge (2, 2'), table tennis table top (1, 1'), when the table top is unfolded, the connection ends of the two table tennis table tops (1, 1') are The table top is connected by a damping hinge (2, 2') which will slowly drop down; when the table top is folded, the two table tops The other two ends (1, 1') that are not connected are acted upon in the opposite direction by the desktop connection damping hinges (2, 2') and will slowly move closer together.

3. A locking device for the table tennis table as claimed in claim 1 after it is unfolded, comprising a rotating rod locking handle (17, 17'), lock handle limit fixing seat (18, 18'), lock handle limit pin (19, 19'), lock The fixed seat (20, 20') is rotated, the lock is turned to the hinge (24), and the lock is turned to the tension spring (25). The characteristic is that the hinge (24) of the rotating lock handle rotates along with the rotation of the rotating rod lock handle (17, 17'); when When the lock is turned to turn the hinge (24) to the horizontal, the damping hinge (2, 2') connected to the desktop rotates in the same direction. The desktop is foldable; when it is rotated to be perpendicular to the damping hinges (2, 2') connected to the desktop, the desktop is locked.

4. A device for keeping the table legs of the table tennis table as claimed in claim 1 perpendicular to the ground when the table is folded and unfolded. Including table legs (3, 3'), table leg balance springs (15, 15'), table top moving wheels (16, 16'), balance springs The hinge seat (23, 23') is characterized by: Table leg balance spring (15, 15') balances table legs (3, 3') The outward tilting force; the raised end provided at the hinged rotation position of the desktop moving wheel (16, 16') abuts against the moving wheel frame, Stop the table legs from falling inward.

5. A device capable of raising and lowering a table tennis table in accordance with claim 1, comprising a table tennis table top (1, 1'), tabletop lifting rails welded on the table legs (4, 4'), rail rolling bearings (7, 7'), tabletop lifting rails Lowering shaft (8, 8'), steel ball limit ring (13, 13'), desktop lifting control rod (14, 14'), lifting The lowering control rod hinge seat (22, 22') is characterized by: To lower the table top, hold the table top lift control The extended end of the rod (14, 14') is pulled horizontally to allow the small diameter shaft to fit into the slot of the table lift rail (4, 4'). Pull upwards to allow the large diameter shaft to enter the track hole, and the table legs (3, 3') will open outwards obliquely; increase the height of the table top. Reverse operation.

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