A coverall for use in engineering work

Abstract

The present application relates to the technical field of work clothes, in particular to a work clothes set for engineering operation, which comprises a jacket and trousers, the jacket is composed of two sleeves and a body, the body is composed of two pairs of open front, collar, back and hem, and the trousers are composed of a waist and legs. The purpose of the present application is to provide a functional work clothes set which is fit, comfortable, wearable and can classify and contain a variety of commonly used tools and personal items by using ergonomics.

Description

Technical Field

[0001] This invention relates to the field of workwear technology, and more specifically to a workwear set used in engineering operations. Background Technology

[0002] Work uniforms not only facilitate workers' work, protect their health, and improve safety, but also serve as an important representation of a company's corporate culture and image. With social development and the continuous improvement of people's living standards, the demands for work clothing are also increasing. This is especially true for work uniforms worn during engineering operations. Workers need many different tools, particularly in environments such as climbing heights or descending mines where it's inconvenient to carry tool bags. If tools had to be replaced from a tool bag every time, work efficiency would inevitably decrease, and the tool bag contains a wide variety of tools, making searching time-consuming and laborious.

[0003] Currently, traditional work clothes have several drawbacks. First, they are simple in function and lack specific tool storage features. If tools are placed directly in the pockets, they are prone to slipping out and being lost, resulting in poor convenience. Second, they are loose and baggy, with clothing exceeding the body's volume excessively. This not only results in poor aesthetics but also hinders the worker's work. Ill-fitting clothes do not move with the body and are easily caught on protruding objects, posing a significant safety hazard. Third, they restrict movement in critical areas (such as the arms when bending the sleeves and the knees when squatting), leading to poor comfort during work.

[0004] Therefore, this study aims to develop a beautiful, practical, and comfortable workwear set that allows for greater activity, is compact, easy to manufacture, fully functional, and helps improve work efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a well-fitting, comfortable, wearable, and functional workwear set that can be categorized to accommodate a variety of commonly used tools and personal items, using ergonomics.

[0006] This invention is achieved through the following technical solution: a workwear set for engineering operations, comprising a jacket and trousers. The jacket consists of two sleeves and a main body, the main body consisting of two open front panels, a collar, a back panel, and a hem. The trousers consist of a waistband and leg openings. The invention is characterized in that the two open front panels include a left front panel and a right front panel connected by a zipper. Each front panel includes an upper shoulder panel, an upper chest panel, a lower chest panel, side panels, and armpit panels. The upper shoulder panel, upper chest panel, and lower chest panel are sewn together sequentially, wherein the inner edge of the chest panel connects to the side panels, and the outer edge connects to the armpit panels. The garment consists of two panels: an upper back panel and a lower back panel. The lower back panel comprises a left lower back panel and a right lower back panel. The left and right lower back panels are inverted right-angled trapezoids, with the hypotenuse of the trapezoid serving as the seam line of the lower back panel. The seam line of the left lower back panel is equal in length to the seam line of the right lower back panel and they overlap and connect. The two sleeves are sewn to the left and right sides of the garment body, respectively. Each sleeve includes an upper large sleeve panel, a middle large sleeve panel, a lower large sleeve panel, a small sleeve panel, and a split cuff. The upper large sleeve panel, the middle large sleeve panel, and the lower large sleeve panel are sewn together sequentially, and the side seams are connected by the small sleeve panel. The top edge of the upper sleeve connects to the main body of the garment, while the bottom edges of the lower sleeve and the smaller sleeve connect to the split cuff. The middle sleeve corresponds to the elbow, and its top edge, bottom seam, and top edge are all concave arc lines. The trouser legs are made of a front and back panel. The front panel includes a front upper panel, a front middle panel, and a front lower panel sewn together sequentially. The front middle panel corresponds to the knee, and its inner and outer edges each have a seam line A. The upper and lower ends of seam line A coincide and are sewn together, giving the front middle panel a forward-convex shape. The back panel includes a series of sewn... The yoke, upper back panel, and lower back panel are described. The upper back panel includes an inner back panel and an outer back panel that are sewn together. An additional allowance is provided at point A on the inner back panel and at point B under the crotch. Both additional allowances are triangular. A concave arc panel is connected to the bottom edge of the middle front panel, the top edge of the lower front panel, the bottom edge of the upper back panel, and the top edge of the lower back panel for additional allowance. The outer edges of the yoke, outer back panel, and lower back panel are sewn to the outer edges of the front panel, and the inner edges of the inner back panel and lower back panel are sewn to the inner edges of the front panel.

[0007] Preferably, the upper left shoulder piece has a first buckle loop, the upper left front chest piece has a first zippered pocket, and the first zippered pocket has a second buckle loop. The upper right front chest piece has a large patch pocket, and the large patch pocket has a second zippered pocket. The second zippered pocket has a small patch pocket on its outer layer. The lower left and right front chest pieces each have symmetrical diagonal pockets. The upper left and right large sleeves each have a zippered concealed pocket, and the outer layer of the zippered concealed pocket has a pen pocket. The zippered concealed pocket on the right sleeve is a mobile phone pocket. The top of the mobile phone pocket has a round hole, and a triangular insulating piece is placed at the round hole. The triangular insulating piece has a cross-shaped sew, which corresponds to the round hole. The earphone cord passes through the round hole and the cross-shaped sew. The trouser legs have zippered three-dimensional pockets, and the zippered three-dimensional pockets have a third buckle loop above them. The zippered three-dimensional pockets have elastic straps inside, which correspond vertically to the third buckle loop. The middle front of the trousers has a knee pad pocket.

[0008] Preferably, the waistband is a V-type elastic waistband with several loops spaced apart on the waistband. One of the loops has a fixed loop below it, with a hook hanging on the fixed loop. The width of the loop at the center of the back side is increased to 4-6cm.

[0009] Preferably, the large and small patch bags are opened and closed by snap fasteners or Velcro, and warning labels are provided on the opening edges of both the large and small patch bags. The knee pad placement bag is opened and closed by Velcro.

[0010] Preferably, reflective warning strips are provided at the seams of the front middle piece and the front lower piece, the seams of the back upper piece and the back lower piece, and the seams of the back upper piece and the back lower piece.

[0011] Preferably, the connection between the two sleeves and the lower back panel, i.e., the back armpit area, is provided with accordion pleats.

[0012] Preferably, the two ends of the concave arc plate are 0.3-0.75 cm higher than the middle part.

[0013] Preferably, the lowest point of the concave arc line is P, the P point of the top edge seam of the large sleeve is 0.5-1.5cm lower than the two ends, the P point of the bottom edge seam of the large sleeve is 0.5-1cm lower than the two ends, and the P point of the top edge seam of the large sleeve is 0.5cm lower than the two ends.

[0014] Preferably, the first addition is located at the crotch bend, with an addition of 2-4 cm; the second addition is located at the lower part of the crotch, with an addition of 1-2 cm.

[0015] Preferably, the underarm piece includes a front underarm piece and a back underarm piece, with the front underarm piece connected to the front chest piece and the back underarm piece connected to the back lower panel.

[0016] The beneficial effects of this invention are:

[0017] 1. The workwear of the present invention allows for a greater range of motion with a smaller volume (the volume encompassed by the surface of the garment when worn on the human body) when elastic fabrics are not suitable. The smaller volume helps avoid work accidents caused by obstructions from protrusions in complex work environments. The greater range of motion reduces the strain on the worker's body, alleviates fatigue, and improves work efficiency.

[0018] 2. This work uniform features appropriately larger chest and hip circumferences. Compared to standard work uniforms, the back panel circumference is larger than the front panel circumference. The longitudinal seams in the indicated areas reduce the circumference of non-moving, key areas, thus reducing the garment's volume. Furthermore, the length of the longitudinal seams is adjusted using transverse seams to accommodate the changes in joint movement caused by the opening and closing, stretching and contracting of the limbs and torso during work.

[0019] 3. In situations where elastic fabrics are not suitable, this work uniform can achieve the desired shape and posture of the human body by using less seam length (reducing production costs), reducing wrinkles when the body is standing, and giving a neat and professional look that is in line with the style of engineering clothing.

[0020] 4. Even without using elastic fabric, the clothing for this project can still accommodate various work activities such as raising both arms 180 degrees simultaneously, bending the elbows to the junction of the forearm and upper arm, and squatting down to the junction of the buttocks and calves.

[0021] 5. The knee pad storage bag provided in this invention can prevent knee chafing and effectively protect the worker's knees.

[0022] 6. This invention features multiple components for storing specific tools, offering comprehensive functionality and an ergonomic layout that facilitates tool access and storage for workers, improving work efficiency. For example, placing the walkie-talkie on the right shoulder allows workers to use their right hand while holding it with their left. Considering the weight-bearing capacity of the legs, the tool loops and large-capacity pockets on the thighs are positioned higher, away from the joint area. When workers use safety belts, pockets on the torso become unsuitable for storing items; therefore, this workwear includes large-capacity pockets on both upper arms to meet the needs of workers.

[0023] 7. The reflective warning strips in this invention make workers more visible when working at night, ensuring safety; the warning labels make it easier for workers to find their pockets at night and also serve as a warning to the outside world.

[0024] The following is supplementary explanation regarding the above-mentioned beneficial effects 1 to 3:

[0025] 1. Vertical dividing lines for the top are, in order: between the side panel and the front chest panel; between the front chest panel and the armpit panel; between the front armpit panel and the back armpit panel; between the back armpit panel and the lower back panel; and between the left and right lower back panels. For the trousers, the dividing lines are, in order: between the outer back panel and the inner back panel; and between the front panel and the back panel.

[0026] The horizontal divisions are specifically the dividing line between the upper shoulder piece and the front chest piece, the dividing line between the upper front chest piece and the lower front chest piece (the upper and lower front chest pieces are increased by 1 cm in length near the front placket, up to the front side piece; the increase is zero near the front side piece); the division between the upper and lower back plackets; the division between the upper, middle, and lower front pieces of the trousers (the division above and below the knee); the division between the back yoke and the upper back piece of the trousers; and the division between the upper back piece and the lower back piece of the trousers.

[0027] 2. When a person raises both arms forward to approximately 135 degrees, the demand for movement in the upper garment is greatest. Plumbing, electrical, and heating engineers frequently perform this movement during wiring operations. To ensure the garment can accommodate this movement, reducing restriction on the body and improving work efficiency, the following design features are implemented: The back shoulder width is 0.5-1 cm wider than the front shoulder width; this is the back shoulder seam allowance, designed to increase the capacity of the scapula. The top and bottom edges of the large sleeve panel are designed with concave arcs, reducing the length of the inward bend at the elbow and lengthening the length of the outward bend. The front of the sleeve is 1-3 degrees greater than the front of the arm, and the sleeve bends at the elbow one to five degrees beyond the natural bend of the arm; the sleeve is inward-buttoned. The back width is increased, the back armhole curve is gently sculpted, and it is sewn to the straight line of the back sleeve cap, allowing for easier forward movement of the sleeve. The accordion pleat at the back armpit is set higher than the center point of the shoulder joint.

[0028] 3. The work pants of the present invention can adapt to the human body's squatting and leg raising movements, effectively reducing the restriction of the pants on the human leg movement, reducing the fatigue of workers during operation, improving work efficiency, and also maintaining a relatively flat state when the human body is standing. This invention achieves its goals through the following design: ① The inner back panel of the pants has an added 2-4cm of movement at the crotch bend and 1-2cm of movement at the lower crotch; ② The lower part of the upper back panel and the upper part of the lower back panel are both made into concave arc panels, and the two concave arc panels are sewn together to form the shape of the lower back panel curving outward, which is conducive to the backward protrusion of the human lower leg and enhances comfort; ③ The upper and lower ends of the edge line A of the middle front panel are overlapped and sewn together to form a pleat, making the middle front panel convex in front, which corresponds exactly to the human knee, expanding the space for movement at the knee and making it more comfortable when the knee is bent; the pleat compresses the lower front panel inward and compresses the lower leg, so the concave arc panel is set to make the lower front panel curve outward, forming a pant shape curve that fits the human lower leg and enhances comfort; ④ When the human squats or lifts his leg, the waist circumference increases, and the length of the movement extension band from the knee, through the inner thigh, to the buttock and to the lower back increases. In order to make the pants adapt to this change, in addition to the above technical treatments, the waistband of these work pants is ⅔ elastic. When a person squats down, the waistband drops down to provide assistance and reduce the pressure on the knees. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the present invention;

[0030] Figure 2 This is a front view of the present invention.

[0031] Figure 3 for Figure 2 A magnified structural diagram of A in the middle;

[0032] Figure 4 This is a schematic diagram of the structure of the back side of the present invention;

[0033] Figure 5 This is a schematic diagram of the disassembled sleeve structure of the present invention;

[0034] Figure 6 This is an exploded structural diagram of the front panel of the trousers of the present invention;

[0035] Figure 7 This is an exploded structural diagram of the back panel of the trousers of the present invention;

[0036] Figure 8 This is a schematic diagram of the concave arc sheet of the present invention;

[0037] In the attached diagram, 1 represents the top, 101 represents the sleeve, 1011 represents the upper part of the large sleeve, 1012 represents the middle part of the large sleeve, 1013 represents the lower part of the large sleeve, 1014 represents the small sleeve, and 1015 represents the split cuff.

[0038] 102 Front panel, 1021 Left front panel, 1022 Right front panel, 1023 Windproof panel, 10211 Upper shoulder panel, 10212 Upper chest panel, 10213 Lower chest panel, 10214 Side panel, 10215 Underarm panel

[0039] 103 Back placket, 1031 Upper back placket, 1032 Lower left back placket, 1033 Lower right back placket, 104 Collar, 105 Hem; 2 Pants, 201 Waistband, 2011 Pants loops, 2012 Fastening piece, 2013 Hook, 202 Pants legs, 2021 Front panel, 20211 Upper front panel, 20212 Center front panel, 2021201 Edge line A, 2021202 Concave arc panel, 20213 Lower front panel, 2022 Back panel, 20221 Yoke, 20222 Outer back panel. 20223 Inner back panel of pants, 20224 Lower back panel of pants, 20225 Additional Item 1, 20226 Additional Item 2, 3 Reflective warning strip, 4 Button loop 1, 5 Button loop 2, 6 Zipper pocket 1, 7 Zipper pocket 2, 8 Small patch pocket, 9 Warning label, 10 Slanted pocket, 11 Zippered concealed pocket, 12 Pen pocket, 13 Button loop 3, 14 Round hole, 15 Triangular insulating piece, 1501 Cross stitch, 16 Zippered three-dimensional pocket, 1601 Elastic strap, 17 Knee pad placement strap, 18 Female concealed snap, 19 Female concealed snap, 20 Accordion pleats. Detailed Implementation

[0040] The invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0041] like Figures 1 to 7 As shown, a workwear set for engineering operations includes a jacket and trousers. The jacket consists of two sleeves and a main body. The main body is composed of two open front panels, a collar, a back panel, and a hem sewn together. The two open front panels include a left front panel and a right front panel connected by a zipper. A windproof flap is provided on the outside of the zipper. The upper and lower ends of the windproof flap are respectively provided with female snap fasteners. The right side of the windproof flap is sewn onto the right front panel, and the left side is connected to the left front panel by a female snap fastener and a female snap fastener. The front panel is composed of an upper shoulder panel, an upper chest panel, a lower chest panel, a side panel, and a front armpit panel sewn together, that is, the upper shoulder panel, the upper chest panel, and the lower chest panel are sewn together from top to bottom. The inner edge of the chest panel is connected to the side panel, the outer edge is connected to the front armpit panel, the front armpit panel is connected to the back armpit panel, and the back armpit panel is connected to the back panel. The purpose of setting the side panels is to shift the bust dart, making the chest area of ​​the garment more defined and shapely. The upper front panel can also be made with extra fabric, with an additional 2-3cm of width added.

[0042] The back placket is made up of an upper back placket and a lower back placket sewn together. A reflective warning strip is sewn onto the surface of the seam between the upper and lower back plackets. The lower back placket includes a left lower back placket and a right lower back placket. The left and right lower back plackets are set in an inverted right-angled trapezoid. The hypotenuse of the inverted right-angled trapezoid is the dividing seam of the lower back placket. The dividing seam of the left lower back placket is the same length as the dividing seam of the right lower back placket and they overlap and connect to divide the lower back placket into two pieces. The use of an inverted right-angled trapezoidal design can effectively prevent the tail of the back placket from curling up, making the top more slim and stylish.

[0043] The two sleeves include the left and right sleeves sewn onto the left and right sides of the garment body. Each sleeve consists of an upper sleeve piece, a middle sleeve piece, a lower sleeve piece, a small sleeve piece, and a split cuff. The upper sleeve piece, middle sleeve piece, and lower sleeve piece are sewn together sequentially, with the side seams connected by the small sleeve piece. The top edge of the upper sleeve piece connects to the garment body. The back armhole of the upper sleeve piece has a gentle curve, while the back sleeve cap is relatively straight, allowing for easier forward movement of the sleeve after sewing. The bottom edges of the lower sleeve piece and the small sleeve piece connect to the split cuff. The middle sleeve piece corresponds to the elbow; to accommodate arm movement and elbow flexion, the top edge of the middle sleeve piece, the bottom seam of the middle sleeve piece, and the top edge of the lower sleeve piece are all concave arc lines. Figure 5 As shown, the lowest point of the concave arc line is P. Point P of the top edge seam of the large sleeve is 0.5-1.5cm lower than both ends. Point P of the bottom edge seam of the large sleeve is 0.5-1cm lower than both ends. Point P of the top edge seam of the large sleeve is 0.5cm lower than both ends. The bottom edge seam of the large sleeve coincides with the top edge seam of the large sleeve and is sewn together. The bottom edge seam of the large sleeve coincides with the top edge seam of the split cuff and is sewn together. Each side of the split cuff has one female button and two female buttons. The purpose of the two female buttons is to allow for adjustment of the cuff size as needed. There are button loops on both sides of the hem, each with one female button and two corresponding female buttons on the hem.

[0044] The trousers consist of a waistband and trouser legs. The waistband is a V-shaped elastic waistband. Several loops are spaced apart on the waistband, usually five in total. One of the loops on one side has a fixed loop below it, on which a hook for hanging keys / tools is suspended. Since the back of the worker experiences greater force when squatting, the loop in the center of the back side is widened to 4-6cm.

[0045] The trouser legs are made of front and back panels. The front panel consists of an upper front panel, a middle front panel, and a lower front panel, which are sewn together in sequence. The middle front panel corresponds to the knee. To conform to the curvature of the human leg, there are edge lines A on the inner and outer edges of the middle front panel. The upper and lower ends of edge lines A are overlapped and sewn together to form pleats, making the middle front panel protrude forward. A knee pad pocket is provided on the middle front panel. The opening of the knee pad pocket is attached to the middle front panel with Velcro. The bottom edge of the middle front panel is sewn to the top edge of the lower front panel, and a reflective warning strip is provided at the seam.

[0046] The back panel of the pants includes a yoke, an upper back panel, and a lower back panel. The upper back panel includes a sewn inner back panel and an outer back panel. The top edge of the upper back panel is sewn to the bottom edge of the yoke, and the bottom edge is sewn to the lower back panel, with a reflective warning strip sewn onto the outside of the seam. The inner back panel has a first reinforcement at point A and a second reinforcement at point B under the crotch. Both reinforcements are triangular. The first reinforcement is located at the crotch bend and has an reinforcement of 2-4cm; the second reinforcement is located under the crotch and has an reinforcement of 1-2cm. By adding reinforcements to the inner back panel, the purpose is to enhance the curve of the buttocks and increase the range of motion in the pant legs.

[0047] At the bottom edge of the front center panel, the top edge of the front lower panel, the bottom edge of the back upper panel, and the top edge of the back lower panel, a concave arc piece is added for extra weight. The ends of the concave arc piece are 0.3-0.75cm higher than the middle. This is to create a forward-convex shape for the front center panel after edge A is applied, with the convex point corresponding to the knee. The lower part of the front center panel curves inward, compressing the calf. To ensure worker comfort and for the leg lines to conform to the human body's curves, these concave arc pieces are added at the aforementioned locations, creating an outward-curving front lower panel for greater comfort and a better fit. Since the highest point of the calf is level with the highest point of the buttocks, a concave arc piece is also added to the top edge of the back lower panel, creating an outward-curving back lower panel and increasing the calf's range of motion.

[0048] The outer edges of the yoke, the outer back panel of the pants, and the lower back panel of the pants are sewn together with the outer edge of the front panel of the pants. The inner edges of the back panel of the pants and the lower back panel of the pants are sewn together with the inner edge of the front panel of the pants.

[0049] The upper left shoulder panel has a loop for hanging walkie-talkies or recorders. The upper left chest panel has a zippered pocket, which has a loop for hanging work badges, measuring tapes, or fixing wrenches and pliers. The upper right chest panel has a large patch pocket for tools, which has a zippered pocket that can be opened and closed. The zippered pocket can be used to store work tickets, notebooks, drawings, and other documents. The outer layer of the large patch pocket has a small patch pocket for storing small parts such as screws and nuts. Both the large and small patch pockets are opened and closed with Velcro or snap fasteners. Warning labels are placed on the opening edges of both the large and small patch pockets so that workers can quickly find the pockets and take out tools when working at night. The lower left and right chest panels have symmetrical slanted pockets for workers to put their hands in to put masks, gloves, or other tools.

[0050] Both the left and right sleeves have zippered pockets. The outer layer of each zippered pocket has a pair of pen holders for electric pens, markers, or utility knives. The zippered pocket on the right sleeve is a cell phone holder. This pocket has a round hole at the top, with a triangular insulating piece at the hole. The triangular insulating piece has a cross-shaped slit that corresponds to the round hole. The cross-shaped slit holds the headphone cord in place to prevent it from slipping. The headphone cord can be used by passing through the round hole and the cross-shaped slit through the cell phone holder.

[0051] The trouser legs feature zippered pockets on the outside. Above the zipper of the left trouser leg's zippered pocket is a loop for hanging tools. Inside the zippered pocket is an elastic strap, which corresponds to the loop. Through the combination of the loop, the zippered pocket, and the elastic strap, large tools with handles such as wrenches can be placed. The elastic strap secures the tools, preventing them from shifting or slipping out while the worker is walking or working. For example, when hanging an adjustable wrench, the wrench head hangs from the loop, while the handle extends into the zippered pocket and is secured by the elastic strap. The zippered pocket can also be used alone to hold tools such as multimeters.

[0052] The connection between the two sleeves and the lower back panel, i.e. the back armpit area, is provided with an accordion pleat, the height of which exceeds the center point of the shoulder joint.

[0053] The upper shoulder piece of the front placket is smaller than the upper back placket, making the back shoulder line 0.5-1.3cm wider than the front shoulder line. When sewing, the back shoulder line is embellished to accommodate the back scapula and increase the range of motion.

[0054] Wearing the workwear set of this invention is not only comfortable and stylish, but also allows for the placement of various categorized tools on the clothing, making them convenient and efficient for workers to access during operations.

[0055] Except for the technical features described in the specification, all other technical features are known to those skilled in the art.

Claims

1. A workwear suit for use in engineering work, comprising a jacket and trousers, said jacket being composed of two sleeves and a body, the body being composed of two pairs of open front, collar, back and hem, said trousers being composed of a waist and legs, characterized in that, The two pairs of open front include left and right front pieces connected by a zipper, the front pieces include upper shoulder pieces, upper front chest pieces, lower front chest pieces, side pieces and underarm pieces, the upper shoulder pieces, the upper front chest pieces and the lower front chest pieces are sequentially sewn, wherein the inner side line of the front chest piece connects the side piece, the outer side line connects the underarm piece, and the underarm piece connects the back; the back includes a back upper piece and a back lower piece, the back lower piece includes a left back lower piece and a right back lower piece, the left back lower piece and the right back lower piece are inverted right angle trapezoids, the oblique edge of the inverted right angle trapezoid is the dividing seam line of the back lower piece, the dividing seam line of the left back lower piece is equal in length to the dividing seam line of the right back lower piece and is connected in coincidence; the two sleeves are respectively sewn on the left and right sides of the body, the sleeve includes an upper sleeve piece, a middle sleeve piece, a lower sleeve piece, a small sleeve piece and a split sleeve opening, the upper sleeve piece, the middle sleeve piece and the lower sleeve piece are sequentially sewn, the two side lines after sewing are connected through the small sleeve piece, the top edge line of the upper sleeve piece connects the body, and the bottom edge line of the lower sleeve piece and the small sleeve piece connects the split sleeve opening, wherein the middle sleeve piece corresponds to the elbow of the human body, the top edge line of the middle sleeve piece, the bottom seam line of the middle sleeve piece and the top edge line of the lower sleeve piece are all concave arc lines; the trousers legs are made of a front piece and a back piece, the front piece includes a front upper piece, a front middle piece and a front lower piece which are sequentially sewn, the front middle piece corresponds to the knee, the inner and outer side lines of the front middle piece are respectively provided with edge line A, the upper end point and the lower end point of the edge line A are coincidentally sewn, and the front middle piece is in front convex type; the back piece includes a yoke, a back upper piece and a back lower piece which are sequentially sewn, the back upper piece includes a back inner side piece and a back outer side piece which are mutually sewn, the back inner side piece is provided with an added amount one at A and an added amount two at B; the bottom edge line of the front middle piece, the top edge line of the front lower piece, the bottom edge line of the back upper piece and the top edge line of the back lower piece are respectively connected with a concave arc piece for added amount processing; the outer side lines of the yoke, the back outer side piece and the back lower piece are sewn with the outer side line of the front piece, the inner side lines of the back inner side piece and the back lower piece are sewn with the inner side line of the front piece; the curve at the back sleeve pocket of the upper sleeve piece is gentle, the curve at the back sleeve mountain tends to be straight, the connection between the two sleeves and the back lower piece, i.e. the back underarm, is provided with an organ fold, the setting height of the organ fold exceeds the center point of the shoulder joint, and the upper shoulder piece of the front is smaller than the back upper piece, so that the back shoulder line is wider than the front shoulder line by 0.5-1.3 cm.

2. The coverall suit for use in engineering work according to claim 1, characterized by The left upper shoulder piece is provided with a buckle one, the left front chest upper piece is provided with a zipper bag one, the zipper bag one is provided with a buckle two, the right front chest upper piece is provided with a large patch bag, the large patch bag is provided with a zipper bag two, the outer layer of the zipper bag two is provided with a small patch bag, and the left and right front chest lower pieces are respectively provided with symmetrical oblique insertion pockets.

3. The coverall suit for use in engineering work according to claim 1, characterized by The trousers are provided with a zipper type three-dimensional pocket, and a buckle three is arranged above the zipper type three-dimensional pocket.

4. The coverall suit for use in engineering work according to claim 2, characterized by The large patch bag and the small patch bag are opened and closed through four-buckle or magic paste adhesion.

5. The coverall suit for use in engineering work according to claim 1, wherein The sewing joints of the front middle piece and the front lower piece of the trousers, the sewing joints of the back upper piece and the back lower piece, and the sewing joints of the back upper piece and the back lower piece are all provided with reflective warning strips.

6. The coverall suit for use in engineering work according to claim 1, wherein The two ends of the concave arc piece are higher than the middle part by 0.3-0.75 cm.

7. The workwear ensemble for use in engineering work of claim 1, wherein, The lowest point of the concave arc line is P, the P point of the top edge sewing line of the middle piece of the large sleeve is concave by 0.5-1.5 cm than the two ends, the P point of the bottom edge sewing line of the middle piece of the large sleeve is concave by 0.5-1 cm than the two ends, and the P point of the top edge sewing line of the lower piece of the large sleeve is concave by 0.5 cm than the two ends.

8. The coverall suit for use in engineering work according to claim 1, wherein The first added amount is arranged at the crotch bending part and is 2-4 cm; and the second added amount is arranged at the lower part of the crotch and is 1-2 cm.

9. The workwear ensemble for use in engineering work of claim 1, wherein, The underarm piece comprises a front underarm piece and a back underarm piece, the front underarm piece is connected with the front chest piece, and the back underarm piece is connected with the back lower piece of the back.

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