Folding mark pen box

Abstract

The utility model discloses a folding mark pen box which is characterized in that the folding mark pen box comprises a folding upper box, a first turnover box, a lower box and a second turnover box, the upper box is rotatably connected with one side wall of the first turnover box through a first connecting piece, and the lower box is rotatably connected with one side wall of the second turnover box through a second connecting piece. The other side walls of the first overturning box and the second overturning box are clamped through clamping groove plates arranged on the right inner side walls of the upper box and the lower box respectively, one side of the upper box and one side of the lower box are rotatably connected through a third connecting piece, the other side of the upper box and the other side of the lower box are mutually buckled through a buckle plate and a buckle, and a plurality of pen clamping grooves are formed in the upper box, the first overturning box, the lower box and the second overturning box. The mark pen clamping device is used for neatly clamping mark pens. During working, the four boxes can be opened and laid flatly, so that marker pens in the four boxes can be replaced frequently and conveniently during drawing by art students, and the marker pens are convenient to take and cannot stain hands; and when not in use, the four boxes can be folded in a vertical overlapping state, so that the storage and the carrying are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of pencil cases, in particular to a foldable marker pen case for storing a plurality of colored marker pens. Background Art

[0002] Markers are colored pens used for writing or drawing. They contain ink and typically come with a cap. They typically have a hard tip. Their pigment is volatile and designed for quick, one-time drawing. They are often used for designing objects, advertising slogans, posters, and other artistic endeavors.

[0003] Markers, as a painting tool, have gained widespread popularity among art students. Currently, markers are available in boxes of 80, 120, 168, and 192 colors. These boxes typically contain simple, single-layered rectangular boxes, with the pens placed side by side. Art students frequently change between different colored markers during painting. This inefficiency is compounded by the need to cap and place each marker in the box after each use. Uncapping the markers before placing them in the box can lead to the risk of bumping into nearby markers and contaminating their hands. Consequently, many art students leave a large number of markers scattered across their drawing board or work surface, taking up considerable space, hindering efficiency, and easily staining the board or work surface. Utility Model Content

[0004] In order to solve the problem that the existing marker pen box is not conducive to art students frequently changing markers when painting and easily dirtying their hands, the utility model provides a foldable marker pen box. By providing foldable upper and lower boxes and first and second flip boxes, the four boxes can be opened flat when in use, which is convenient for art students to frequently change the markers in the four boxes when painting, and the markers are easy to take out without dirtying their hands; when not in use, the four boxes can be folded into a vertical stacking state, which is convenient for storage and carrying.

[0005] The foldable marker pen box of claim 1, wherein the foldable marker pen box comprises a first flip box, a second flip box, a left side wall of the upper box and a right side wall of the first flip box being rotatably connected by a first connecting piece, and the left side wall of the lower box and the right side wall of the second flip box being rotatably connected by a second connecting piece. The middle of the inner side surfaces of the right sides of the upper box and the lower box are provided with a slot plate for snapping with the left side wall of the first flip box or the second flip box when folded, the front side wall of the upper box and the rear side wall of the lower box being rotatably connected by a third connecting piece, and the rear side wall of the upper box and the front side wall of the lower box being snapped with each other by a buckle plate and a buckle when folded, the buckle plate being provided on the front side wall of the lower box, and the buckle being provided on the rear side wall of the upper box, and a plurality of pen clipping slots being provided in the upper box, the first flip box, the lower box and the second flip box for neatly snapping marker pens.

[0006] In the working state, the upper box, the first flip box, the lower box and the second flip box can be completely flipped and opened horizontally, and all openings face upwards, so that the markers neatly arranged inside are displayed in front of the eyes, which is convenient for the painter to use;

[0007] In the non-working state, the first flip box flips to the right and is set in the upper box, the second flip box flips to the right and is set in the lower box, and the upper box flips forward with the first flip box on top of the lower box, so that the four boxes are in a vertical stacking state.

[0008] Furthermore, the upper box, the first flip box, the lower box, the second flip box, the first connecting piece, the second connecting piece and the third connecting piece are all integrally injection molded;

[0009] The left and right sides of the first connecting member are connected to the right outer side of the first flip box and the left inner side of the upper box respectively. The wall thickness of the first connecting member gradually increases from right to left, and the minimum thickness on the right side is set to 0.2-0.4 mm.

[0010] The left and right sides of the second connecting member are respectively connected to the right outer side of the second flip box and the left inner side of the lower box. The wall thickness of the second connecting member gradually increases from right to left, and the minimum thickness on the right side is set to 0.2-0.4 mm.

[0011] The front and rear sides of the third connecting member are connected to the front outer side of the upper box and the rear outer side of the lower box respectively. The wall thickness of the third connecting member gradually increases from the middle to the front and rear sides, and the minimum thickness in the middle is set to 0.2-0.4 mm.

[0012] Furthermore, the gusset plate is provided with two pieces, which are respectively provided on the upper ends of the left front outer side and the right front outer side of the lower box. The thickness of the connection between the gusset plate and the lower box is set to 0.2-0.4 mm, so that the gusset plate can be flipped up and down, and a slot is provided in the middle of the gusset plate;

[0013] The left and right rear outer sides of the upper box are both provided with first grooves at positions corresponding to the buckle plate, and the buckles are provided with two pieces, respectively provided on the bottom surfaces of the left and right first grooves;

[0014] When folded, the buckle plate flips upward and is engaged with the buckle. A round-head protrusion extending upward is provided on the outer side of the upper end surface of the buckle, and the inner side surface of the round-head protrusion is an inclined surface inclined inward and downward. The upper side surface of the card slot is V-shaped, and the front side surface of the V-shape is consistent with the inclination of the inclined surface, which is convenient for buckling.

[0015] Furthermore, the slot plate is configured as a U-shaped slot plate, the opening of the U-shaped slot plate faces the right inner wall of the upper box or the lower box, and a vertical slot is provided on the left side of the upper end, and the slot is used to cooperate and snap into the right side wall of the first flip box or the second flip box when the first flip box and the second flip box are flipped and folded.

[0016] Furthermore, left clamping plates are provided at both ends of the outer side surface of the left side wall of the lower box, and a right clamping plate is provided in the middle of the outer side surface of the right side wall. The left clamping plate and the right clamping plate are used to clamp the left and right outer side surfaces of the upper box when the upper box and the lower box are docked and folded.

[0017] Furthermore, two first support plates are provided on the left and right sides of the inner bottom surface of the upper box, each of which is spaced apart and arranged side by side. The first support plates are provided with a plurality of evenly distributed pen holder slots. The number of pen holder slots on the four first support plates is the same and the positions are one-to-one corresponding. A marker pen is respectively received in the same corresponding pen holder slot of the two first support plates on the left and the two first support plates on the right.

[0018] Two second support plates are provided on the left and right sides of the inner bottom surface of the lower box, each of which is spaced apart and arranged side by side. The second support plates are provided with a plurality of evenly distributed pen holder slots. The number of pen holder slots on the four second support plates is the same and the positions are one-to-one corresponding. A marker pen is respectively received in the same corresponding pen holder slot of the two second support plates on the left and the two second support plates on the right.

[0019] Two third support plates are provided on the left and right sides of the inner bottom surface of the first flip box, and are arranged side by side. The third support plates are provided with a plurality of evenly distributed pen holder slots. The number of pen holder slots on the four third support plates is the same and the positions are one-to-one corresponding. A marker pen is respectively received in the same corresponding pen holder slot of the two third support plates on the left and the two third support plates on the right;

[0020] Two fourth support plates are provided on the left and right sides of the inner bottom surface of the second flip box, and are arranged side by side. The fourth support plates are provided with a number of evenly distributed pen holder slots. The number of pen holder slots on the four fourth support plates is the same and the positions correspond one to one. A marker pen is respectively clamped in the same corresponding pen holder slot of the two fourth support plates on the left and the two fourth support plates on the right.

[0021] Furthermore, it also includes a handle, which is a hollow structure and is divided into an upper handle and a lower handle in half. The upper handle is provided in the middle of the lower end of the rear side of the upper box, and two symmetrical positioning pins are provided on the inner bottom surface of the rear side of the inner cavity of the upper handle; the lower handle is provided in the middle of the upper end of the front side of the lower box, and two positioning pin sleeves are provided on the inner bottom surface of the front side of the inner cavity of the lower handle, which cooperate with the positioning pins and plug into them. When the upper box is flipped forward and folded, the upper and lower handles are connected by plugging into the positioning pins and the positioning pin sleeves;

[0022] The upper handle, the positioning pin and the upper box are integrally formed, and the lower handle, the positioning pin sleeve and the lower box are integrally formed.

[0023] Furthermore, a double plug-in plate is provided on the front side of the inner cavity of the lower half handle, and the double plug-in plate is provided with two pairs, which are respectively arranged between the two positioning pin sleeves and close to the two positioning pin sleeves. The double plug-in plate includes two plug-in plates, which are respectively connected to the front and rear inner side surfaces of the inner cavity, and the upper ends extend out of the lower half handle; the front and rear inner side surfaces of the rear side of the inner cavity of the upper half handle are provided with second grooves that cooperate with the plug-in plates, and when the upper half handle is docked with the lower half handle, the plug-in plates are snapped into the corresponding second grooves; the double plug-in plates are integrally formed with the lower box.

[0024] Furthermore, a number of evenly distributed fifth support plates are provided on the inner side walls around the upper box and the lower box, and downward steps are provided on the upper ends of the fifth support plates near the inner side of the box. The upper surface of the steps is used to support the first flip box that is mounted in the upper box after flipping or the second flip box that is mounted in the lower box after flipping.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. The utility model is provided with a foldable upper box, a first flip box, a second flip box and a lower box. The upper box, the first flip box, the second flip box and the lower box can each store a plurality of markers of evenly distributed colors. When working, the upper box, the first flip box, the second flip box and the lower box can be opened flat, which is convenient for art students to frequently change markers when painting. Each time the marker is used up, it can be put back into the pen card slot in the box body. The pen is placed flat in the box body, which is convenient to take out without getting your hands dirty.

[0027] 2. The utility model realizes the folding function of the upper box, the first flip box, the lower box and the second flip box by setting the first, second and third connecting members. The four boxes can be folded into a vertical stacking state, which is convenient for storage and carrying;

[0028] 3. The utility model provides a positioning pin and a positioning pin sleeve, and a double plug-in plate and a second groove for plugging in, so that the upper and lower boxes can be folded and connected more simply and quickly. The buckle and the buckle plate are buckled with each other, so that the upper and lower boxes are firmly buckled. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the flat auxiliary structure of an embodiment of the utility model;

[0030] Figure 2 for Figure 1 Enlarged view of point E in the middle;

[0031] Figure 3 for Figure 1 Enlarged view of point F in the middle;

[0032] Figure 4 This is a schematic structural diagram of the first connecting member in the open state according to an embodiment of the utility model;

[0033] Figure 5 This is a schematic diagram of the folding and stowing structure of an embodiment of the utility model;

[0034] Figure 6 This is a cross-sectional structural diagram of an embodiment of the utility model in a folded state;

[0035] Figure 7 for Figure 6 Enlarged view of point G in the middle;

[0036] Figure 8 This is a schematic diagram of the longitudinal cross-section structure of the embodiment of the utility model in the folded state;

[0037] Figure 9 for Figure 8 Enlarged view of H in the middle;

[0038] Figure 10 for Figure 1 Enlarged view of point I in the middle.

[0039] In the figure: 1, upper box, 101, first groove, 2, lower box, 3, first flip box, 4, second flip box, 5a, first support plate, 5b, second support plate, 5c, third support plate, 5d, fourth support plate, 501, pen slot, 6, slot plate, 601, slot, 7, handle, 7a, upper handle, 7b, lower handle, 701, positioning pin, 702, second groove, 703, positioning pin sleeve, 704, double plug-in plate, 8, fifth support plate, 9, buckle, 10, card plate, 1001, square through groove, 11a, first reinforcing rib, 11b, second reinforcing rib, 12, left card plate, 13, right card plate, 14, first connecting piece, 15, second connecting piece, 16, third connecting piece. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the corresponding drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0042] like Figure 1 As shown, the embodiment of the present utility model includes a foldable upper box 1, a first flip box 3, a lower box 2 and a second flip box 4, the left side wall of the upper box 1 and the right side wall of the first flip box 3 are rotatably connected by a first connecting member 14, and the left side wall of the lower box 2 and the right side wall of the second flip box 4 are rotatably connected by a second connecting member 15. A card slot plate 6 is provided in the middle of the inner side surface of the right side wall of the upper box 1 and the lower box 2, which is used to snap with the left side wall of the first flip box 3 and the second flip box 4 when folded. The front side wall of the upper box 1 and the rear side wall of the lower box 2 are rotatably connected by a third connecting member 16, and the rear side wall of the upper box 1 and the front side wall of the lower box 2 are snapped together by a buckle plate 10 and a buckle 9. The buckle plate 10 is provided on the front side wall of the lower box 2, and the buckle 9 is provided on the rear side wall of the upper box 1. 40 pen slots 501 are provided in the upper box 1, the first flip box 3, the lower box 2 and the second flip box 4, which are used to neatly snap into 80 colors of double-headed triangular markers;

[0043] Figure 1 The figure shows the working state. The upper box 1, the first flip box 3, the lower box 2 and the second flip box 4 can be completely flipped and opened horizontally, with the openings facing upwards, so that the markers neatly arranged inside are displayed in front of the eyes, making it convenient for the painter to use;

[0044] like Figure 5 The figure shows the folded and stowed state. The first flip box 3 is flipped to the right and is placed inside the upper box 1. The second flip box 4 is flipped to the right and is placed inside the lower box 2. The upper box 1 flips forward with the first flip box 3 on top of the lower box 2, so that the four boxes are in a vertically stacked state.

[0045] Furthermore, the upper box 1, the first flip box 3, the lower box 2, the second flip box 4, the first connecting member 14, the second connecting member 15 and the third connecting member 16 are all integrally injection molded;

[0046] like Figure 1 As shown, the left and right sides of the first connecting member 14 are connected to the right outer side of the first flip box 3 and the left inner side of the upper box 1 respectively. The wall thickness of the first connecting member 14 gradually increases from right to left, and the minimum thickness S2 on the right side is set to 0.2-0.4 mm;

[0047] The left and right sides of the second connecting member 15 are connected to the right outer side of the second flip box 4 and the left inner side of the lower box 2 respectively. The wall thickness of the second connecting member 15 gradually increases from right to left, and the minimum thickness S2 on the right side is set to 0.2-0.4 mm.

[0048] like Figure 6 、 7 It is a structural diagram of the first connecting member 14, the upper box 1, the first flip box 3, and the second connecting member 15, the lower box 2, and the second flip box 4 in the folded state.

[0049] like Figure 4 As shown, in this embodiment, when the upper box 1 is in the horizontally opened state, the front and rear sides of the third connecting member 16 are respectively connected to the front outer side of the upper box 1 and the rear outer side of the lower box 2. The wall thickness of the third connecting member 16 gradually increases from the middle to the front and rear sides, and the minimum thickness S1 in the middle is set to 0.2-0.4 mm.

[0050] Further, such as Figure 1 、 5 As shown, there are two buckle plates 10, which are respectively arranged on the left front outer side surface and the upper end of the right front outer side surface of the lower box 2. The thickness of the connection between the buckle plate 10 and the lower box 1 is set to 0.2~0.4mm, so that the buckle plate 10 can be flipped up and down. A card slot 1001 is provided in the middle of the buckle plate 10; the buckle plate 10 and the lower box 2 are integrally formed.

[0051] like Figure 1 As shown, the left rear outer side surface and the right rear outer side surface of the upper box 1 are both provided with first grooves 101 at positions corresponding to the buckle plate 10, and the buckle 9 has two pieces, which are respectively provided on the bottom surfaces of the left and right first grooves 101 (as shown in FIG. Figure 5 As shown); the buckle 9 is integrally formed with the upper box.

[0052] like Figure 8 、 9 As shown, in the folded state, a round head protrusion extending upward is provided on the outer side of the upper end surface of the buckle 9, and the inner side surface of the round head protrusion is an inclined surface inclined inward and downward. The upper side surface of the card slot 1001 is V-shaped, and the front side surface of the V-shape is consistent with the slope of the inclined surface, which is convenient for buckling.

[0053] Further, such as Figure 1 、 10 As shown, the card slot plate 6 is set as a U-shaped card plate, the opening of the U-shaped card plate faces the right inner wall of the upper box 1 or the lower box 2, and a vertical card slot 601 is provided on the left side of the upper end. The card slot 601 is used to cooperate with the right side wall of the first flip box 3 or the second flip box 4 when the first flip box 3 and the second flip box 4 are flipped and folded (as shown in FIG. Figure 6 shown).

[0054] Further, such as Figure 1 As shown, left clamping plates 12 are provided at both ends of the outer side surface of the left side wall of the lower box 2, and a right clamping plate 13 is provided in the middle of the outer side surface of the right side wall. The left clamping plate 12 and the right clamping plate 13 are used to clamp the left and right outer side surfaces of the upper box 1 when the upper box 1 and the lower box 2 are folded and docked.

[0055] Further, such as Figure 1As shown, two first support plates 5a are provided on the left and right sides of the inner bottom surface of the upper box 1, each separated and arranged side by side. The first support plates 5a are provided with 10 evenly distributed pen holder slots 501. The number of pen holder slots 501 on the four first support plates 5a is the same and the positions are one-to-one corresponding. A marker pen is respectively held in the same corresponding pen holder slot 501 on the two first support plates 5a on the left and the two first support plates 5a on the right.

[0056] Two second support plates 5b are provided on the left and right sides of the inner bottom surface of the lower box 2, each spaced apart and arranged side by side. Each second support plate 5b is provided with 10 evenly distributed pen holder slots 501. The number of pen holder slots 501 on the four second support plates 5b is the same and the positions are one-to-one corresponding. A marker pen can be respectively received in the corresponding pen holder slot 501 on the two second support plates 5b on the left and the two second support plates 5b on the right.

[0057] Two third support plates 5c are provided on the left and right sides of the inner bottom surface of the first flip box 3, and are arranged side by side. Each of the third support plates 5c is provided with 10 evenly distributed pen holder slots 501. The number of pen holder slots 501 on the four third support plates 5c is the same and the positions are one-to-one corresponding. A marker pen is respectively held in the same corresponding pen holder slot 501 on the two third support plates 5c on the left and the two third support plates 5c on the right.

[0058] Two fourth support plates 5d are provided on the left and right sides of the inner bottom surface of the second flip box 4, and are arranged side by side. The fourth support plates 5d are provided with 10 evenly distributed pen holder slots 501. The number of pen holder slots 501 on the four fourth support plates 5d is the same and the positions are one-to-one corresponding. A marker pen is respectively clamped in the same corresponding pen holder slot 501 of the two fourth support plates 5d on the left and the two fourth support plates 5d on the right.

[0059] Further, such as Figure 1 、 2 As shown in Figures 3 and 4, the embodiment of the present invention further includes a handle 7. The handle 7 is a hollow structure and is divided into an upper handle 7a and a lower handle 7b. The upper handle 7a is provided in the middle of the lower end of the rear side of the upper box 1. Two symmetrical positioning pins 701 are provided on the inner bottom surface of the rear side of the inner cavity of the upper handle 7a; the lower handle 7b is provided in the middle of the upper end of the front side of the lower box 2. Two positioning pin sleeves 703 that cooperate with the positioning pins 701 are provided on the inner bottom surface of the front side of the inner cavity of the lower handle 7b. When the upper box 1 is flipped and folded forward, the upper handle 7a and the lower handle 7b are connected by the positioning pins 701 and the positioning pin sleeves 703.

[0060] The upper handle 7a and the positioning pin 701 are integrally formed with the upper box 1 , and the lower handle 7b and the positioning pin sleeve 703 are integrally formed with the lower box 2 .

[0061] Furthermore, the positioning pin 701 is a conical positioning pin, and the inner hole of the positioning pin sleeve 703 is set to be an inner conical hole with the same taper as the positioning pin 701.

[0062] Further, such as Figure 1 、 2 As shown in Figure 3, a double plug-in plate 704 is further provided on the front side of the inner cavity of the lower half handle 7b. There are two pairs of double plug-in plates 704, which are respectively arranged between the two positioning pin sleeves 703 and close to the two positioning pin sleeves 703. The double plug-in plates 704 include two plug-in plates, which are respectively connected to the front and rear inner side surfaces of the inner cavity, and the upper ends extend out of the lower half handle 7b; the front and rear inner side surfaces of the rear side of the inner cavity of the upper half handle 7a are provided with second grooves 702 that cooperate with the plug-in plates. When the upper half handle 7a is docked with the lower half handle 7b, the plug-in plates are snapped into the corresponding second grooves 702; the double plug-in plates 704 are integrally formed with the lower box 2.

[0063] Further, such as Figure 1 As shown, a plurality of evenly distributed fifth support plates 8 are provided on the inner side walls of the upper box 1 and the lower box 2. The upper ends of the fifth support plates 8 are provided with downward steps near the inner side of the box. The upper surface of the steps is used to support the first flip box 3 set in the upper box 1 after flipping or the second flip box 4 set in the lower box 2 after flipping (as shown in FIG. Figure 6 shown).

[0064] Further, such as Figure 1 As shown, a longitudinal first reinforcing rib 11a is provided in the middle of the inner bottom surface of the upper box 1 and the lower box 2, which is used to improve the strength of the upper box 1 and the lower box 2; a longitudinal second reinforcing rib 11b is provided in the middle of the inner bottom surface of the first flip box 3 and the second flip box 4, which is used to improve the strength of the first flip box 3 and the second flip box 4.

[0065] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. A foldable marker pen box, characterized by: The foldable box comprises a first flip box, a lower box and a second flip box, the left side wall of the upper box and the right side wall of the first flip box being rotatably connected by a first connecting piece, the left side wall of the lower box and the right side wall of the second flip box being rotatably connected by a second connecting piece, a slot plate is provided in the middle of the inner side surfaces of the right sides of the upper box and the lower box, for being snapped with the left side wall of the first flip box or the second flip box when folded, the front side wall of the upper box and the rear side wall of the lower box being rotatably connected by a third connecting piece, and when folded, the rear side wall of the upper box and the front side wall of the lower box are snapped with each other by a buckle plate and a buckle, the buckle plate being provided on the front side wall of the lower box, and the buckle being provided on the rear side wall of the upper box, and a plurality of pen slots are provided in the upper box, the first flip box, the lower box and the second flip box for neatly snapping markers; In the working state, the upper box, the first flip box, the lower box and the second flip box can be completely flipped and opened horizontally, and all openings face upwards, so that the markers neatly arranged inside are displayed in front of the eyes, which is convenient for the painter to use; In the non-working state, the first flip box flips to the right and is set in the upper box, the second flip box flips to the right and is set in the lower box, and the upper box flips forward with the first flip box on top of the lower box, so that the four boxes are in a vertical stacking state.

2. The foldable marker pen box according to claim 1, characterized in that: The upper box, the first flip box, the lower box, the second flip box, the first connecting piece, the second connecting piece and the third connecting piece are all integrally injection-molded; The left and right sides of the first connecting member are connected to the right outer side of the first flip box and the left inner side of the upper box respectively. The wall thickness of the first connecting member gradually increases from right to left, and the minimum thickness on the right side is set to 0.2-0.4 mm. The left and right sides of the second connecting member are connected to the right outer side of the second flip box and the left inner side of the lower box respectively. The wall thickness of the second connecting member gradually increases from right to left, and the minimum thickness on the right side is set to 0.2-0.4 mm. The front and rear sides of the third connecting member are respectively connected to the front outer side of the upper box and the rear outer side of the lower box. The wall thickness of the third connecting member gradually increases from the middle to the front and rear sides, and the minimum thickness in the middle is set to 0.2-0.4 mm.

3. The foldable marker box according to claim 1, characterized in that: The gusset plate is provided with two pieces, which are respectively provided on the upper ends of the left front outer side and the right front outer side of the lower box. The thickness of the connection between the gusset plate and the lower box is set to 0.2-0.4 mm, so that the gusset plate can be turned up and down. A card slot is provided in the middle of the gusset plate; The left and right rear outer sides of the upper box are both provided with first grooves at positions corresponding to the buckle plate, and the buckles are provided with two pieces, respectively provided on the bottom surfaces of the left and right first grooves; When folded, the buckle plate flips upward and is engaged with the buckle. A round-head protrusion extending upward is provided on the outer side of the upper end surface of the buckle, and the inner side surface of the round-head protrusion is an inclined surface inclined inward and downward. The upper side surface of the card slot is V-shaped, and the front side surface of the V-shape is consistent with the inclination of the inclined surface, which is convenient for buckling.

4. The foldable marker pen box according to claim 1, characterized in that: The slot plate is configured as a U-shaped slot plate, the opening of the U-shaped slot plate faces the right inner wall of the upper box or the lower box, and a vertical slot is provided on the left side of the upper end. The slot is used to cooperate with the right side wall of the first flip box or the second flip box when the first flip box and the second flip box are flipped and folded.

5. The foldable marker box according to claim 1, characterized in that: Left clamping plates are provided at both ends of the outer side surface of the left side wall of the lower box, and a right clamping plate is provided in the middle of the outer side surface of the right side wall. The left clamping plate and the right clamping plate are used to clamp the left and right outer side surfaces of the upper box when the upper box and the lower box are docked and folded.

6. The foldable marker box according to claim 1, characterized in that: Two first support plates are provided on the left and right sides of the inner bottom surface of the upper box, each of which is spaced apart and arranged side by side. The first support plates are provided with a plurality of evenly distributed pen holder slots. The number of pen holder slots on the four first support plates is the same and the positions are one-to-one corresponding. A marker pen is respectively received in the same corresponding pen holder slot of the two first support plates on the left and the two first support plates on the right. Two second support plates are provided on the left and right sides of the inner bottom surface of the lower box, each of which is spaced apart and arranged side by side. The second support plates are provided with a plurality of evenly distributed pen holder slots. The number of pen holder slots on the four second support plates is the same and the positions are one-to-one corresponding. A marker pen is respectively received in the same corresponding pen holder slot of the two second support plates on the left and the two second support plates on the right. Two third support plates are provided on the left and right sides of the inner bottom surface of the first flip box, and are arranged side by side. The third support plates are provided with a plurality of evenly distributed pen holder slots. The number of pen holder slots on the four third support plates is the same and the positions are one-to-one corresponding. A marker pen is respectively received in the same corresponding pen holder slot of the two third support plates on the left and the two third support plates on the right; Two fourth support plates are provided on the left and right sides of the inner bottom surface of the second flip box, and are arranged side by side. The fourth support plates are provided with a number of evenly distributed pen holder slots. The number of pen holder slots on the four fourth support plates is the same and the positions correspond one to one. A marker pen is respectively clamped in the same corresponding pen holder slot of the two fourth support plates on the left and the two fourth support plates on the right.

7. The foldable marker box according to claim 1, characterized in that: The handle is hollow and is divided into an upper handle and a lower handle in half. The upper handle is provided at the middle of the lower end of the rear side of the upper box, and two symmetrical positioning pins are provided on the inner bottom surface of the rear side of the inner cavity of the upper handle; the lower handle is provided at the middle of the upper end of the front side of the lower box, and two positioning pin sleeves are provided on the inner bottom surface of the front side of the inner cavity of the lower handle, which cooperate with the positioning pins and plug into each other. When the upper box is flipped forward and folded, the upper and lower handles are connected by plugging into the positioning pins and the positioning pin sleeves. The upper handle, the positioning pin and the upper box are integrally formed, and the lower handle, the positioning pin sleeve and the lower box are integrally formed.

8. The foldable marker box according to claim 7, characterized in that: A double plug-in plate is also provided on the front side of the inner cavity of the lower half handle, and the double plug-in plate is provided with two pairs, which are respectively arranged between the two positioning pin sleeves and close to the two positioning pin sleeves. The double plug-in plate includes two plug-in plates, which are respectively connected to the front and rear inner side surfaces of the inner cavity, and the upper ends extend out of the lower half handle; the front and rear inner side surfaces of the rear side of the inner cavity of the upper half handle are provided with second grooves that cooperate with the plug-in plates. When the upper half handle is docked with the lower half handle, the plug-in plates are snapped into the corresponding second grooves; the double plug-in plates are integrally formed with the lower box.

9. The foldable marker pen box according to claim 1, characterized in that: A plurality of evenly distributed fifth support plates are provided on the inner side walls around the upper box and the lower box, and a downward step is provided on the upper end of the fifth support plate near the inner side of the box, and the upper surface of the step is used to support the first flip box that is mounted in the upper box after flipping or the second flip box that is mounted in the lower box after flipping.

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