Face shield
Patent Information
- Application Number
- BR202020015917
- Authority / Receiving Office
- BR · BR
- Patent Type
- Utility models
- Current Assignee / Owner
- Publication Date
- 2026-08-25
Smart Images
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Abstract
Description
1 / 6 FACE SHIELD DESCRIPTION FIELD
[0001] This description pertains to the field of protective clothing, more specifically to face masks. FUNDAMENTALS OF THE MODEL
[0002] The outbreak of the novel coronavirus (SARS-CoV-2) was declared a pandemic by the WHO on March 11, 2020. Since then, various efforts have been made to control this disease, including recommendations for the use of personal protective equipment (PPE) by government authorities.
[0003] Face shields are devices that have a transparent visor, designed to cover the entire front of the user's face. They are used to prevent exposure, primarily of the eyes, to splashes, droplets, and aerosols, and are recommended in various healthcare situations (Brazil, 2020, TECHNICAL NOTE GVIMS / GGTES / ANVISA No. 04 / 2020), and should be used in combination with masks (e.g., N95 / PFF2). STATE OF THE ART
[0004] One problem related to the construction technique of face shields is the balance between ergonomics, ease of sterilization, cost reduction and simplicity of manufacture.
[0005] Regarding ergonomics, the visor should be held far enough away from the face during use, while a visor support element should be comfortably adjustable to the body when wearing the protector.
[0006] A reduced number of individual parts facilitates both the manufacture and assembly of the face shield. A solution that addresses the sterilization problem is provided by parts free of curves and complex geometries, for example, flexible parts that assume a flat shape when not in use and assume another suitable geometry when in use.
[0007] Documents USD732242, US20120047614, US5983390, Petition 870200097806, dated 04 / 08 / 2020, page 9 / 20 2 / 6 US5440760 and US5113528 describe face shields that essentially comprise three elements: a visor; a strap connected to the visor, configured to fasten around a user's head; and a spacer element, positioned between the visor and the user's forehead, which prevents the visor from coming into contact with the face during use.
[0008] Document US4853974 describes a face shield comprising three elements: a flexible visor; a flexible fastening strap, configured to fasten around a user's head; and hook-and-loop fastenings (e.g., Velcro®), provided on the visor and the fastening strap, wherein the strap fasteners are configured to connect with the visor fasteners. The visor is made of flexible material, having a flat shape when not tensioned and assuming a semi-circular shape, viewed from above, when the visor is tensioned by the connection with the fastening strap. The constitutive characteristics of the visor material and the tensioning provided by the strap are sufficient to create an adequate clearance between the visor and the user's face during the use of the face shield.
[0009] Document US4867178 describes a type of face shield comprising two elements: a trapezoidal visor when viewed from above; and a fastening strap, configured to fasten around the user's head, having two free ends for securing it to the visor. The characteristics of this trapezoidal visor and the fastening strap with free ends allow for adequate clearance between the visor and the user's face during the use of the face shield.
[0010] Prior art models do not disclose a face shield with only two flexible elements, namely a flexible visor and a flexible fastening strap. Therefore, the problem that is not solved by prior techniques lies in combining simplicity of manufacture with ease of disassembly and sterilization of the equipment parts. BRIEF DESCRIPTION OF THE MODEL Petition 870200097806, dated 04 / 08 / 2020, page 10 / 20 3 / 6
[0011] One of the objectives of this description is to provide a face shield comprising a reduced number of individual parts. Another objective of this description is to provide a face shield consisting only of flexible, easily sanitized elements, which assume a flat shape when disassembled to facilitate sterilization, transport and storage of the equipment parts.
[0012] The objectives of this description are achieved by a face shield comprising:
[0013] a flexible fastening strap, configured to fasten around a user's head, provided with adjustable fasteners at both ends, which allow an adjustable connection between the ends of the strap; and,
[0014] a flexible visor, provided with two pairs of through holes arranged on opposite edges of an upper end of the visor, wherein the visor assumes an approximately semi-circular shape, viewed from above, when tensioned by inserting the fixing tape into its two pairs of through holes followed by connecting the ends of the flexible fixing tape.
[0015] The objectives of this description are also achieved by a face shield, in which:
[0016] the said flexible display assumes a flat shape when the ends of said tape are disconnected and said tape is removed from the through holes of the flexible display; and,
[0017] the aforementioned flexible fastening tape assumes a flat shape when its ends are disconnected and it is removed from the through holes of the flexible visor. BRIEF DESCRIPTION OF THE FIGURES
[0018] The present description will be illustrated below in some modalities represented in the drawings.
[0019] Figure 1 is a schematic perspective representation of Petition 870200097806, dated 04 / 08 / 2020, page 11 / 20 4 / 6 a configurable variant of the described face shield.
[0020] Figures 2a and 2b are schematic representations of a configurational variant of the described face shield, in its three-dimensional form, in side and front views.
[0021] Figures 3a and 3b are schematic representations of the visor and fastening strap of a variant configuration of the described face shield, in its flat form.
[0022] Figures 4a to 4e are schematic representations of configurational variants of the described face shield visor, in its flat form. DETAILED DESCRIPTION OF THE FIGURES
[0010] Figure 1 illustrates the assembly of the two individual elements that constitute the main modality of the face shield (10) described, in its three-dimensional form.
[0011] A flexible fastening strap (30) is provided, configured to fasten around a user's head. The strap has adjustable fasteners (31) at both ends, allowing a connection between these ends in a way that is adjustable in length along the strap. When the ends of the strap are connected, the strap assumes an approximately circular shape, viewed from above. The adjustable connection may, for example, have an adjustable graduation every 10 mm, so as to increase / decrease the circumference of the closed strap, viewed from above.
[0012] A flexible visor (20) is provided, having two pairs of through holes (21) arranged on opposite edges (22,22') of an upper end (24) of the visor. In its three-dimensional configuration, mounted with the tape (30) closed, the visor (20) assumes an approximately semi-circular shape, viewed from above. This three-dimensional shape is achieved by the curvature of the flexible visor (20), tensioned by the connection with the tape (30).
[0013] In its three-dimensional form, an inner surface of the visor (20) faces the user's face, defining an inner and an outer area of the visor (20). The tape (30) is inserted through each hole of the pair of holes. Petition 870200097806, dated 04 / 08 / 2020, page 12 / 20 5 / 6 through holes (21), wherein the tape (30) passes from the inner area to the outer area of the visor, through a first hole (21) of the pair of holes, and passes from the outer area to the inner area of the visor, through a second hole (21) of the pair of holes. In the three-dimensional form of the face shield (10), when worn by a user, each pair of holes (21) is situated adjacent to a temporal region of the user's head.
[0014] As an additional element, the tape (30) has two pairs of recesses (32). When the tape is encircling the user's head, each pair of recesses (32) is situated adjacent to a temporal region of the head. The recesses (32) are configured for the correct positioning of the tape (30) in the pairs of through holes (21) of the visor (20). The ends of the recesses (32) provide stops at the interface with the edges of the holes (21), which prevent the visor (20) from accidentally moving relative to the tape (30) when in use.
[0015] The tape (30) and the visor (20) are made of a flexible material. Desirable characteristics of this material include transparency, mechanical resistance, non-toxicity, flexibility, fire retardancy and anti-reflective and anti-fog surface treatments. Additionally, they must be easy to clean, thus excluding the use of foams and elastics. An example of a material with these characteristics is Polyethylene Terephthalate Glycol (PETG), which is suitable for making the tape (30) and the visor of the present face shield.
[0016] Figures 2a and 2b illustrate a face shield (10) assembled, in its three-dimensional form, in side and front views, respectively.
[0017] In turn, Figure 3a illustrates a visor (20), in its flat form, having its two pairs of through holes (21) adjacent to the edges (22,22') of the flexible visor (20). In this figure it is possible to observe the smooth curved geometry of the visor (20), which is free of sharp edges, for user safety. Figure 3b shows the flexible fastening tape (30), in its flat form, with pairs of recesses (32) in two intermediate sections and adjustable fasteners. Petition 870200097806, dated 04 / 08 / 2020, page 13 / 20 6 / 6 (31) at both ends.
[0018] In a variant configuration of the face shield (10) described, represented in the figures, the side edges (22,22') of the visor (20) are slightly inclined in relation to the vertical axis, while the lower end (23) has a slight protrusion in the center and slight recesses near the edges (22,22'), so as to extend the internal protection area of the user's frontal region, when in the assembled configuration, without compromising the user's mobility due to interference of the visor with the user's shoulders.
[0019] In another configuration variant, represented in figure 4a, the display has the side edges (22,22') parallel to the vertical axis, while the lower end (23) has a smooth protrusion in the center and smooth recesses near the edges (22,22').
[0020] In another configuration variant, represented in figure 4b, the display has the lower end (23) parallel to the horizontal axis, while the side edges (22,22') of the display (20) are slightly inclined in relation to the vertical axis.
[0021] In another configuration variant, represented in figure 4c, the display has the lower end (23) in the shape of an arc of a circle (e.g., from 2 to 120°), while the side edges (22,22') of the display (20) are slightly inclined in relation to the vertical axis.
[0022] In another configuration variant, represented in figure 4d, the display has lateral edges (22,22') in the shape of a circular arc (e.g., from 2 to 120°), while the lower end (23) has a smooth protrusion in the center and smooth recesses near the edges (22,22').
[0023] Although exemplary forms of the described object have been presented in this report, the possible configurational variants are not limited to the literal meaning of these forms. A technician may readily apply the teachings presented here to analogous solutions, resulting from combinations of characteristics of the configurational variants presented here. Petition 870200097806, dated 04 / 08 / 2020, page 14 / 20
Claims
1 / 2 CLAIMS 1. Face shield, characterized by comprising: a flexible fastening strap (30), configured to fasten around the head of a user, provided with adjustable fasteners (31) at both ends, which allow an adjustable connection between the ends of the flexible fastening strap (30); and, a flexible visor (20), provided with two pairs of through holes (21) arranged on opposite edges (22,22') of an upper end (24) of the visor (20), wherein the visor (20) has an approximately semi-circular shape, viewed from above, being tensioned by the insertion of the flexible fastening strap (30) into its two pairs of through holes (21) followed by the connection between the ends of the flexible fastening strap (30).
2. Face shield, according to claim 1, characterized in that the side edges (22,22') of the visor (20) are slightly inclined relative to the vertical axis, and the lower end (23) has a smooth protrusion in the center and smooth recesses near the edges (22,22').
3. Face shield, according to claim 1, characterized in that the side edges (22,22') are parallel with respect to the vertical axis, and the lower end (23) has a smooth protrusion in the center and smooth recesses near the edges (22,22').
4. Face shield, according to claim 1, characterized in that the lower end (23) is parallel to the horizontal axis, and the side edges (22,22') of the visor (20) are slightly inclined relative to the vertical axis.
5. Face shield, according to claim 1, characterized in that the lower end (23) is shaped like an arc of a circle, and the side edges (22,22') of the visor (20) are slightly inclined relative to the vertical axis.
6. Face shield, according to claim 1, characterized in that the side edges (22,22') are in the shape of a circle arc, and the Petition 870200097806, dated 04 / 08 / 2020, page 15 / 20 2 / 2 lower end (23) has a smooth protrusion in the center and smooth recesses near the edges (22,22').
7. Face shield according to any one of claims 1 to 6, characterized by comprising two pairs of recesses (32) in the flexible fastening tape (30), wherein each recess end (32) is configured to provide stops interfacing with the edges of respective through holes (21) in the flexible visor (20). Petition 870200097806, dated 04 / 08 / 2020, page 16 / 20