CN211186306U - Retractable myopia prevention position of sitting rectification appearance - Google Patents

Abstract

The utility model discloses a telescopic myopia-preventing sitting posture correction instrument, wherein a transverse pipe comprises unit pipes with axially butted adjacent ends, and the unit pipes are subjected to mortise and tenon butt joint through joints inserted in shaft holes; reinforcing ribs which are positioned at the two sides of the drop foot and are symmetrical to each other are arranged at the right-angle joint of the bracket; a convex end at the right-angle joint on the bracket is provided with a spherical shape for protection; the base comprises a locking pad with an uneven bearing surface; a taper hole for installation is arranged on the locking pad, and the diameter of the hole bottom is larger than that of the hole; the rotary arm comprises a fulcrum part which is butted with the base and provides horizontal rotation; a groove and a matching part for guiding the rotation of the swing arm are arranged between the swing arm and the relative rotation plane of the base; at least two grooves are arranged; the matching part comprises a positioning pin and a spring steel ball component; the first end and the second end of the groove matched with the steel balls are both provided with a recess with the depth larger than that of the groove. The main body of the product is made of ABS material, and the injection molding process is more suitable for pupils compared with a metal frame.

Description

Retractable myopia prevention position of sitting rectification appearance

Technical Field

The utility model relates to the field of vision care equipment, in particular to a telescopic myopia-preventing sitting posture correction instrument.

Background

The sitting posture correction instrument in the current market has a backpack type, a chest supporting type and a bracket type. The backpack type is used for fixing a body together with a chair, so that the body cannot tilt forwards, the distance between eyes and books is ensured, the backpack type is in direct contact with the body, discomfort is easily caused to the body, the body can be forced to tilt forwards by virtue of the pulling force of the back strap after long-time use, and the backpack type is not beneficial to the cultivation of a correct sitting posture habit; the chest-supporting type is that a top plate is arranged between a desk and a body, the top plate supports the body, the body can not be excessively inclined forward when reading and writing, the distance between eyes and books is ensured, the style is also in direct contact with the body, the body can bear force on the top plate, the effect of protecting eyes is only achieved after long-term use, and the correct sitting posture is not facilitated. There is not direct contact between appearance and the health is corrected to the posture of support to through making the student form the habit of correct position of sitting to reach protection eyesight and prevention hunchback purpose, the not enough in the aspect of structure and safety of the similar support formula product in market, the problem has: 1. the main body of the material is of a metal structure, so that the product is easy to damage in the installation and use processes, and meanwhile, the metal edges and corners can also cause damage to the human body, so that the material is inconvenient for pupils to use; 2. the product can not be adjusted in the length or height direction, and the product can not be well used or even used under different environments; 3. the angle is not controllable, products in the market can rotate 360 degrees, the products are inconvenient to use and collect, and meanwhile certain damage can be caused to the products; 4. the product structure is unreasonable, and the requirements of different lengths cannot be well met; the deformation of the main functional area is serious; the product appearance shrinkage ratio is unbalanced, and the product not only wastes materials but also causes uneven influence on the product appearance.

Disclosure of Invention

The utility model discloses the purpose is: the telescopic sitting posture correction instrument for preventing myopia is used for correcting the sitting posture of pupils when reading and writing, cultivating the correct sitting posture habit of pupils and effectively preventing myopia and humpback of pupils.

The technical scheme of the utility model is that: a telescopic sitting posture correction instrument for preventing myopia.

The horizontal pipe comprises unit pipes which are horizontally arranged and axially butted at adjacent ends, and the unit pipes are subjected to mortise and tenon butt joint through joints inserted in shaft holes. Meanwhile, a tubular sheath is sleeved outside the transverse pipe. Therefore, the joint built in the cross pipe does not affect the movement of the sheath.

The two ends of the transverse pipe are respectively connected with a support in a coaxial opposite-inserting mode, and radial tightening is carried out at the inserting position through a locking nut, so that firm connection is ensured.

The bracket is in a right-angle shape, so that the bracket can be divided into a horizontal end and a vertical end. The front end of the horizontal end is inserted into the horizontal pipe, and the rear end of the horizontal end is a protruding end at the right-angle hinge joint. In order to avoid the influence of sharp or edge on the use, the convex end is processed into a spherical surface and is more attractive. The reinforcing ribs are arranged at the vertical intersecting positions of the horizontal end and the vertical end, and the reinforcing ribs are arranged on two sides of the foot hanging position in the plane where the vertical angle is located. The left side and the right side of the vertical end are symmetrically provided with the reinforcing rib structures, so that the levelness of the horizontal end and the horizontal rod after assembly can be guaranteed. Meanwhile, the deformation of a bending right angle caused by the shrinkage of the horizontal end material can be avoided, and the phenomenon that the cross rod is concave is avoided.

The vertical end of the bracket is also butted with the radial arm in an inserting mode, and the inserting position is still radially locked by the locking nut. The swing arm is a rotating member, and the lower end thereof is mounted on the base and rotated through a fulcrum portion.

Preferably, the fulcrum portion includes: the raised cylindrical end of the radial arm and the bolt in the cylindrical end are in threaded fit. The matching hole of this bolt is the blind hole, can avoid adopting the base to leak the reference column outward, solves the problem of tong when using.

The base is provided with a through hole matched with the cylindrical end. The cylinder end is inserted into the through hole, protrudes out of the surface of the spiral arm, the protruding length of the cylinder end is larger than the depth of the through hole, the bolt matched in the cylinder end is assembled from the base, and the base can be tightly connected with the spiral arm. At this time, the length of the protrusion on the cylindrical end can prevent the radial arm from being locked.

The swing arm rotates based on the fulcrum portion, and therefore the rotation requires guidance and limitation. A groove and a matching part for guiding the rotation of the radial arm are arranged between the radial arm and the relative rotation plane of the base. Wherein, the groove takes the fulcrum as the centre of a circle and is arranged in an arc shape, and the groove can be matched with the rotating track of the matching part.

Each groove includes at least: the first end part of the rotating arm is stopped at a horizontal position, the second end part of the rotating arm is stopped at a correct sitting position, and the two end parts can ensure the maximum limit of the rotating amplitude of the rotating arm.

At least two grooves are arranged between the relative rotation planes of the spiral arm and the base, and the two grooves are distinguished according to functions and can be matched with different matching parts. The cooperation portion includes locating pin and spring steel ball subassembly, and wherein, the first end in the groove of cooperation steel ball and second end all are equipped with the recess that is greater than the groove depth degree. The recess can generate a structure-matched prompt tone while playing a limiting role, and a user is reminded of rotating the limit.

Preferably, the slots are divided into: a pin shaft motion track groove matched with the positioning pin and a steel ball motion track groove matched with the spring steel ball component. The spring steel ball assembly comprises a spring arranged in a spring cavity, the steel ball is pressed in a steel ball moving track groove by the free end of the spring, and the two ends of the steel ball moving track groove are provided with the spherical depressions larger than the groove depth.

Preferably, the end face of the base is further provided with a mark for distinguishing the left installation side from the right installation side, and simultaneously, the Chinese and English marks are adopted, so that the installation direction can be made clear, and the operation is convenient.

The base is clamped at the edge of the table top, so that the base is provided with a U-shaped opening, and one side wall of the opening is provided with a screw hole which is opposite to the other side wall. The screw hole is internally matched with a bolt, and the front end of the bolt is provided with a locking pad. The locking pad is provided with a taper hole for installation, and the diameter of the hole bottom is larger than the diameter of the hole. Thus, the front end of the bolt fits within the tapered hole, ensuring that the front end of the bolt has an interference fit with the bore of the tapered hole, but a clearance fit with the bottom of the tapered hole. Thus, the locking pad cannot rotate along with the rotation of the bolt, and the locking pad cannot fall off.

Preferably, however, the locking pad has an uneven pressure surface to prevent the locking pad from slipping or loosening.

Preferably, the main body of the telescopic myopia-preventing sitting posture correction instrument is made of ABS engineering plastics, the injection molding process is adopted, the service life of the product is long, obvious deformation and damage cannot occur in long-term use, and compared with the main body which is made of a metal steel pipe, the telescopic myopia-preventing sitting posture correction instrument is made of ABS materials and is more suitable for pupils.

The utility model has the advantages that:

1. the product protective sleeve passes through the joint without resistance, and the protective sleeve can be arranged at any position of use, thereby achieving the protective effect.

2. The locking pad has large friction force between the uneven surface and the desktop, and can not damage the locked object in the locking state.

3. The base has the slow-witted sign of preventing, can not adorn in the assembly anti-, adopts indent formula to end the position groove simultaneously, can not cause the interference to the surrounding environment, mainly for pressing from both sides the risk of hindering, has the heavy groove of angle response in the base, and the product is more or receive and release the angle occasionally the angle warning when arriving work, can not too big cause the damage to the product.

4. The left and right rotating arms adopt blind hole design, the outer part is smooth, and the use potential safety hazard of a product is reduced; when the product is used, the body is not contacted with the product, and the long-term use of the product is more favorable for the development of good sitting habit.

5. The main body of the product is made of ABS material, and the injection molding process is more suitable for pupils compared with a metal frame.

Drawings

The invention will be further described with reference to the following drawings and examples:

FIG. 1 is a structural diagram of a retractable anti-myopia sitting posture correction instrument;

FIG. 2 is a structural docking diagram of the cross tube;

FIG. 3 is a structural view of the cross tube;

FIG. 4 is a diagram of a cross tube docking according to the prior art;

FIG. 5 is a block diagram of a prior art cross tube;

FIG. 6 is a structural diagram of a bending part of the bracket;

FIG. 7 is a structural deformation diagram of a bending part of a bracket in the prior art;

FIG. 8 is an enlarged partial cross-sectional view of the engagement of the radial arm with the base;

FIG. 9 is an enlarged partial cross-sectional view of the radial arm;

FIG. 10 is a side view of the left base;

FIG. 11 is a side view of the right base;

FIG. 12 is a prior art combination of a radial arm and base;

FIG. 13 is a pressure bearing surface view of the locking pad;

FIG. 14 is a cross-sectional view A-A of the locking pad;

FIG. 15 is a view showing the variation in the size of the screw holes in the locking pad;

FIG. 16 is a cross-sectional view of a prior art locking pad and bolt engagement;

FIG. 17 is a view showing a state of rotation of the swing arm;

FIG. 18 is a perspective view of the arm of the retractable anti-myopia sitting posture correction instrument at a horizontal angle;

FIG. 19 is a perspective view of the arm of the retractable anti-myopia sitting posture correction instrument at a working angle;

wherein: 1. a unit pipe; 11. a joint; 2. a support; 21. a protruding end; 22. reinforcing ribs; 3. a swing arm; 31. a second bolt; 32. a locking spring; 33. rolling the steel ball; 34. positioning pins; 35. a cylindrical end; 4. a fixed seat; 41. the steel balls move the track grooves; 42. the pin shaft moves the track groove; 43. chinese and English marks; 44. the pin shaft moves the track groove; 45. a locking pad; 46. spherical depressions; 47. a knob.

Detailed Description

Example 1:

the main body of the telescopic myopia-preventing sitting posture correction instrument is made of ABS engineering plastics, and the telescopic myopia-preventing sitting posture correction instrument structurally comprises a cross rod, a support 2, a spiral arm 3 and a fixing seat 4. The both ends of horizontal pole dock a support 2 respectively, and support 2 is the type bracing piece of bending, and the lower extreme butt joint spiral arm 3 of support 2, spiral arm 3 then install on the turning point of fixing base 4, and fixing base 4 is fixed on the desk. The swing arm 3 and the cross rod form a frame structure in a shape of a gantry, and the cross rod rotates around the fixed seat 4 based on a rotating point between the swing arm 3 and the fixed seat 4.

The horizontal pipe in this embodiment includes unit pipes 1 with adjacent ends in axial butt joint, and the unit pipes 1 are in mortise and tenon butt joint through lengthened joints 11 inserted in the shaft holes. As shown in fig. 2 and 3, the elongated connectors 11 are located within the cross tubes and do not affect the flatness of the cross tube surface. Meanwhile, a protective sleeve 7 with a protective function is sleeved outside the transverse pipe. Therefore, the joint 11 built in the lateral pipe does not affect the movement of the sheath.

Different from the prior art: at present, most unit pipes are mainly in an outer wrapping mode in butt joint mode (as shown in figures 4 and 5), a sheath cannot penetrate through a joint, and the sheath loses the protection function under certain conditions.

Example 2:

the main body of the telescopic myopia-preventing sitting posture correction instrument is made of ABS engineering plastics, and the telescopic myopia-preventing sitting posture correction instrument structurally comprises a cross rod, a support 2, a spiral arm 3 and a fixing seat 4. Wherein the bracket 2 is in a right-angle shape, so the bracket 2 can be divided into a horizontal end and a vertical end. The front end of the horizontal end is inserted into the horizontal pipe, the inserted part is radially locked by a first locking nut 5, and the rear end of the horizontal end is a protruding end 21 at the right-angle hinge joint. In order to avoid sharp or sharp edges affecting the use, the protruding end 21 is machined to be spherical and more attractive.

The reinforcing ribs 22 are also arranged at the vertical intersection positions of the horizontal end and the vertical end, and the reinforcing ribs 22 are arranged on two sides of the foot hanging position in the plane where the vertical angle is located. As shown in fig. 6, the reinforcing rib structures are symmetrically arranged at the left and right sides of the vertical end, which can ensure the levelness of the horizontal end and the cross bar after assembly. Meanwhile, the deformation of a bending right angle caused by the shrinkage of the horizontal end material can be avoided, and the phenomenon that the cross rod is concave is avoided. The vertical end of the bracket 2 is also butted with the radial arm in an inserting way, and the inserting part is radially locked by a second locking nut 6.

Different from the prior art: the same type of product currently on the market is a single-bent stent that does not employ reinforcing ribs or asymmetric single-sided reinforcement (as shown in fig. 7). Therefore, after long-term use, the 90-degree folding angle is deformed due to material shrinkage, and the actual angle is smaller than 90 degrees, so that the middle cross bar is sunken.

Example 3:

the main body of the telescopic myopia-preventing sitting posture correction instrument is made of ABS engineering plastics, and the telescopic myopia-preventing sitting posture correction instrument structurally comprises a cross rod, a support 2, a spiral arm 3 and a fixing seat 4. Wherein, the swing arm 3 is installed with the fixed seat 4 through a fulcrum part and keeps the swing arm to rotate.

Specifically, the method comprises the following steps:

as shown in fig. 8, a raised cylindrical end 35 of the radial arm 3, and a second bolt 31 threadedly engaged in the cylindrical end. The matching hole of the second bolt 31 is a blind hole, so that the positioning column can be prevented from being leaked outside the fixing seat 4, and the problem of clamping hands in use is solved.

A through hole matched with the cylindrical end 35 is arranged on the fixed seat 4. The cylindrical end 35 is inserted into the through hole, the cylindrical end 35 protrudes from the surface of the radial arm (as shown in fig. 8 and 9), the protruding length of the cylindrical end 35 is greater than the depth of the through hole, and the second bolt 31 fitted in the cylindrical end is assembled from the fixed seat 4, which can fasten the fixed seat 4 and the radial arm 3. The length of the cylindrical end 35 is such that it prevents the radial arm 3 from being locked.

As shown in fig. 10 and 11, a pin movement track groove 42 and a steel ball movement track groove 41 are formed on the outer side surface of the fixed base 4, and a corresponding positioning pin 34 and a spring steel ball assembly are provided on the swing arm 3. The two grooves are both arranged in an arc shape by taking the second bolt 31 as a circle center, and the grooves can be matched with the rotating track of the matching part.

The arrangement positions of the two grooves can be designed according to actual conditions, and in the embodiment, the two grooves are arranged at two opposite positions by taking the fulcrum part as a central symmetrical point.

Each groove includes at least: the first end part of the rotating arm is stopped at a horizontal position, the second end part of the rotating arm is stopped at a correct sitting position, and the two end parts can ensure the maximum limit of the rotating amplitude of the rotating arm. As shown in fig. 17, in the present embodiment, the maximum rotation amplitude of the radial arm is 130 degrees from horizontal to horizontal.

Wherein, the first end and the second end of the steel ball moving track groove 41 are both provided with a spherical recess 46 which is larger than the depth of the groove. The spherical recess 46 can generate a structural matching prompt tone while playing a limiting role, and reminds a user of the limit of rotation.

The spring steel ball assembly comprises a spring cavity arranged on the spiral arm, a locking spring 32 is arranged in the spring cavity, the free end of the locking spring 32 presses the rolling steel ball 33 in the steel ball movement track groove 41, when the rolling steel ball 33 rotates to the spherical recess 46 along with the spiral arm 3, the rolling steel ball 33 is bounced into the groove by the locking spring 32 to give out impact sound because of the change of the groove depth, and therefore a user is reminded that the rolling steel ball has rotated to a stop angle.

The end face of the fixed seat 4 is also provided with a mark for distinguishing the left installation side from the right installation side, and meanwhile, the Chinese and English marks 43 are adopted, so that the installation direction can be made clear, and the operation is convenient.

Different from the prior art: like products in the market at present rely on the outer leakage cylinder to limit, namely set up the location cylinder on the surface of base, can be blocked by the location cylinder when the radial arm rotates to the angle of stopping the position (as shown in fig. 12). The structure has the risk of clamping hands in operation, and the structure is easy to deform after long-term use, so that the operation safety is influenced.

Example 4:

the main body of the telescopic myopia-preventing sitting posture correction instrument is made of ABS engineering plastics, and the telescopic myopia-preventing sitting posture correction instrument structurally comprises a cross rod, a support 2, a spiral arm 3 and a fixing seat 4. Wherein, the swing arm 3 is installed with the fixed seat 4 through a fulcrum part, and keeps the swing arm 3 rotating.

The fixing seat 4 is clamped at the edge of the table top, so that a U-shaped opening is arranged on the fixing seat 4, and a screw hole which is opposite to the other side wall is formed in one side wall of the opening. The first bolt 44 is fitted in the screw hole, and a lock pad 45 is mounted on the front end of the first bolt 44. As shown in fig. 13, the locking pad 45 has an uneven pressure surface to prevent the locking pad from slipping or loosening.

As shown in fig. 15, the locking pad 45 is provided with a tapered hole for installation, and the diameter of the bottom of the hole is larger than the diameter of the hole. Thus, the front end of the first bolt 44 fits within the tapered bore, ensuring that the front end of the first bolt 44 has an interference fit with the bore of the tapered bore, but a clearance fit with the bottom of the tapered bore (as shown in FIG. 14). When the knob 47 at the lower end of the first bolt 44 is twisted, the lock pad 45 is not rotated together with the rotation of the first bolt 44, and it is ensured that the lock pad is not dropped.

Different from the prior art: the inner and outer sizes of the assembling holes of the locking pads of the same type of products in the market at present are the same, and the locking pads are directly assembled by adopting common screws (as shown in figure 15). The locking pad can rotate along with the rotation of the bolt under the condition, and meanwhile, the locking pad and the bolt cannot be guaranteed not to fall off, so that troubles are caused to the use of customers.

Example 5:

the main part of retractable myopia prevention position of sitting rectification appearance adopts ABS engineering plastics, and the structure includes two unit pipes, left socle, right branch frame, left swinging boom, right swinging boom, left fixing base, right fixing base. Wherein, the two unit pipes form a cross rod through the built-in butt joints; the left end of the cross rod is in butt joint with the left support, and the right end of the cross rod is in butt joint with the right support; the lower end of the left bracket is in butt joint with the left rotating arm, and the lower end of the right bracket is in butt joint with the right rotating arm; the left rotating arm is matched with the left fixed seat, and the right rotating arm is matched with the right fixed seat.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical concepts of the present invention be covered by the claims of the present invention.

Claims (10)

1. A telescopic myopia-preventing sitting posture correction instrument comprises a horizontal pipe which is horizontally arranged, and two ends of the horizontal pipe are inserted with right-angle brackets; the lower end of the bracket is assembled to the base through the spiral arm; the method is characterized in that:

the transverse pipe comprises unit pipes with adjacent ends in axial butt joint, and the unit pipes are in mortise and tenon butt joint through joints inserted in the shaft holes;

reinforcing ribs which are positioned at two sides of the foot and are symmetrical to each other are arranged at the right-angle joint of the bracket; a convex end at the right-angle joint on the bracket is provided with a spherical shape for protection;

the base comprises an opening for clamping; a locking pad with an uneven pressure bearing surface is arranged in the opening; a taper hole for installation is formed in the locking pad, and the diameter of the hole bottom is larger than that of the hole;

the rotary arm comprises a fulcrum part which is butted with the base and provides horizontal rotation; a groove and a matching part for guiding the rotation of the swing arm are arranged between the swing arm and the relative rotation plane of the base; the grooves are arranged in an arc shape by taking the supporting points as circle centers; the groove at least comprises: a first end portion for stopping the swing arm in a horizontal position, and a second end portion for stopping the swing arm in a correct sitting posture height; at least two grooves are arranged; the matching part comprises a positioning pin and a spring steel ball assembly; the first end and the second end of the groove matched with the steel balls are both provided with a recess with the depth larger than that of the groove.

2. The retractable myopia-preventing sitting posture correction instrument as claimed in claim 1, wherein: the first bolt with the front end matched in the taper hole is included; the front end of the first bolt is in interference fit with the hole opening of the taper hole and is in clearance fit with the hole bottom of the taper hole.

3. The retractable myopia-preventing sitting posture correction instrument as claimed in claim 1 or 2, wherein: a screw hole which is opposite to the other side wall is formed in one side wall of the opening; the first bolt is matched in the screw hole.

4. The retractable myopia-preventing sitting posture correction instrument as claimed in claim 3, wherein: the fulcrum portion includes: the second bolt is in threaded fit with the cylindrical end; and the base is provided with a through hole matched with the cylindrical end.

5. The retractable myopia-preventing sitting posture correction instrument as claimed in claim 4, wherein: the cylindrical end protrudes out of the surface of the spiral arm, and the protruding length of the cylindrical end is larger than the depth of the through hole.

6. The retractable myopia-preventing sitting posture corrector as claimed in claim 1 or 5, wherein: the groove is divided into: the pin shaft of the positioning pin is matched with the moving track groove, and the steel ball of the spring steel ball component is matched with the moving track groove.

7. The retractable myopia-preventing sitting posture correction instrument as claimed in claim 5, wherein: the spring steel ball assembly comprises a spring arranged in a spring cavity, and the free end of the spring presses the steel ball in the steel ball movement track groove.

8. The retractable myopia-preventing sitting posture correction instrument as claimed in claim 7, wherein: the outer sleeve of the transverse tube is provided with a tubular sheath.

9. The retractable myopia-preventing sitting posture correction instrument as claimed in claim 8, wherein: the splicing parts of the bracket and the cross rod and the splicing parts of the bracket and the swing arm are all fastened through locking nuts.

10. The retractable myopia-preventing sitting posture correction instrument as claimed in claim 9, wherein: and the end surface of the base is provided with a mark for distinguishing the mounting side of the base.

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